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[Jboss-svn-commits] JBL Code SVN: r2010 - in trunk/labs/jbossrules/drools-core/src: main/java/org/drools/reteoo main/java/org/drools/rule main/java/org/drools/spi test/java/org/drools/examples/manners test/java/org/drools/rule test/java/org/drools/spi
Author: mar...@jb...
Date: 2006-01-06 21:17:23 -0500 (Fri, 06 Jan 2006)
New Revision: 2010
Removed:
trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/ExtractorBinding.java
Modified:
trunk/labs/jbossrules/drools-core/src/main/java/org/drools/reteoo/ReteTuple.java
trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/Binding.java
trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/ColumnBinding.java
trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/Declaration.java
trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/EvaluatorFactory.java
trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/Rule.java
trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/ClassObjectType.java
trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/DefaultKnowledgeHelper.java
trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/Evaluator.java
trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/Extractor.java
trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/KnowledgeHelper.java
trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/ObjectType.java
trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/Tuple.java
trunk/labs/jbossrules/drools-core/src/test/java/org/drools/examples/manners/Context.java
trunk/labs/jbossrules/drools-core/src/test/java/org/drools/examples/manners/Guest.java
trunk/labs/jbossrules/drools-core/src/test/java/org/drools/examples/manners/MannersTest.java
trunk/labs/jbossrules/drools-core/src/test/java/org/drools/examples/manners/Seat.java
trunk/labs/jbossrules/drools-core/src/test/java/org/drools/examples/manners/Seating.java
trunk/labs/jbossrules/drools-core/src/test/java/org/drools/rule/ConstraintTest.java
trunk/labs/jbossrules/drools-core/src/test/java/org/drools/rule/DeclarationTest.java
trunk/labs/jbossrules/drools-core/src/test/java/org/drools/spi/ClassFieldExtractor.java
trunk/labs/jbossrules/drools-core/src/test/java/org/drools/spi/MockObjectType.java
Log:
-Fist commit for the native manners example
-Refactoring due to issues uncovered implementing manners
Modified: trunk/labs/jbossrules/drools-core/src/main/java/org/drools/reteoo/ReteTuple.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/main/java/org/drools/reteoo/ReteTuple.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/main/java/org/drools/reteoo/ReteTuple.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -158,6 +158,10 @@
return null;
}
}
+
+ public FactHandle getFactHandleForDeclaration(Declaration declaration) {
+ return this.key.get( declaration.getColumn() );
+ }
public WorkingMemory getWorkingMemory() {
return this.workingMemory;
Modified: trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/Binding.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/Binding.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/Binding.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -1,16 +1,21 @@
package org.drools.rule;
+import org.drools.spi.Extractor;
import org.drools.spi.ObjectType;
public abstract class Binding {
private final String identifier;
- private final ObjectType objectType;
+ private final ObjectType objectType;
+
+ private final Extractor extractor;
public Binding(String identifier,
- ObjectType objectType) {
+ ObjectType objectType,
+ Extractor extractor) {
this.identifier = identifier;
this.objectType = objectType;
+ this.extractor = extractor;
}
/**
@@ -26,5 +31,11 @@
public ObjectType getObjectType() {
return this.objectType;
}
+
+ public Extractor getExtractor() {
+ return this.extractor;
+ }
+
+
}
Modified: trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/ColumnBinding.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/ColumnBinding.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/ColumnBinding.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -1,5 +1,6 @@
package org.drools.rule;
+import org.drools.spi.ColumnExtractor;
import org.drools.spi.ObjectType;
public class ColumnBinding extends Binding {
@@ -9,7 +10,8 @@
ObjectType objectType,
Column column) {
super( identifier,
- objectType );
+ objectType,
+ new ColumnExtractor(objectType));
this.column = column;
}
Modified: trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/Declaration.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/Declaration.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/Declaration.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -114,8 +114,8 @@
*
* @return The object-type.
*/
- public Class getDeclarationType() {
- return this.extractor.getValueType();
+ public ObjectType getObjectType() {
+ return this.extractor.getObjectType();
}
/**
@@ -176,7 +176,7 @@
Declaration other = (Declaration) object;
- return this.index == other.index && this.identifier.equals( other.identifier ) && this.extractor.getValueType().equals( other.extractor.getValueType() );
+ return this.index == other.index && this.identifier.equals( other.identifier ) && this.extractor.getObjectType().equals( other.extractor.getObjectType() );
}
}
Modified: trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/EvaluatorFactory.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/EvaluatorFactory.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/EvaluatorFactory.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -23,6 +23,8 @@
return getShortEvaluator( operator );
case Evaluator.INTEGER_TYPE :
return getIntegerEvaluator( operator );
+ case Evaluator.BOOLEAN_TYPE :
+ return getBooleanEvaluator( operator );
default :
throw new RuntimeException( "Type '" + type + "' does not exist for BaseEvaluatorFactory" );
}
@@ -80,7 +82,60 @@
return !object1.equals( object2 );
}
}
+
+ static class BooleanEqualEvaluator extends BaseEvaluator {
+ private static Evaluator INSTANCE;
+ public static Evaluator getInstance() {
+ if ( INSTANCE == null ) {
+ INSTANCE = new BooleanEqualEvaluator();
+ }
+ return INSTANCE;
+ }
+
+ private BooleanEqualEvaluator() {
+ super( Evaluator.BOOLEAN_TYPE,
+ Evaluator.EQUAL );
+ }
+
+ public boolean evaluate(Object object1,
+ Object object2) {
+ return ((Boolean)object1).booleanValue() == ((Boolean)object2).booleanValue();
+ }
+ }
+
+ Evaluator getBooleanEvaluator(int operator) {
+ switch ( operator ) {
+ case Evaluator.EQUAL :
+ return ObjectEqualEvaluator.getInstance();
+ case Evaluator.NOT_EQUAL :
+ return ObjectNotEqualEvaluator.getInstance();
+ default :
+ throw new RuntimeException( "Operator '" + operator + "' does not exist for BooleanEvaluator" );
+ }
+ }
+
+ static class BooleanNotEqualEvaluator extends BaseEvaluator {
+ private static Evaluator INSTANCE;
+
+ public static Evaluator getInstance() {
+ if ( INSTANCE == null ) {
+ INSTANCE = new BooleanNotEqualEvaluator();
+ }
+ return INSTANCE;
+ }
+
+ private BooleanNotEqualEvaluator() {
+ super( Evaluator.BOOLEAN_TYPE,
+ Evaluator.NOT_EQUAL );
+ }
+
+ public boolean evaluate(Object object1,
+ Object object2) {
+ return ((Boolean)object1).booleanValue() != ((Boolean)object2).booleanValue();
+ }
+ }
+
Evaluator getShortEvaluator(int operator) {
switch ( operator ) {
case Evaluator.EQUAL :
Deleted: trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/ExtractorBinding.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/ExtractorBinding.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/ExtractorBinding.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -1,24 +0,0 @@
-package org.drools.rule;
-
-import org.drools.spi.Extractor;
-import org.drools.spi.ObjectType;
-
-public class ExtractorBinding extends Binding {
- private final Extractor extractor;
-
- public ExtractorBinding(String identifier,
- ObjectType objectType,
- Extractor extractor) {
- super( identifier,
- objectType );
- this.extractor = extractor;
- }
-
- /**
- * @return Returns the extractor.
- */
- public Extractor getExtractor() {
- return this.extractor;
- }
-
-}
Modified: trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/Rule.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/Rule.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/main/java/org/drools/rule/Rule.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -49,9 +49,13 @@
import java.util.List;
import java.util.Map;
+import org.drools.spi.ClassObjectType;
+import org.drools.spi.ColumnExtractor;
import org.drools.spi.Condition;
import org.drools.spi.Consequence;
+import org.drools.spi.Constraint;
import org.drools.spi.Duration;
+import org.drools.spi.Evaluator;
import org.drools.spi.Extractor;
import org.drools.spi.Importer;
import org.drools.spi.Module;
@@ -363,7 +367,7 @@
* the <code>identifier</code>.
*/
public Declaration getDeclaration(String identifier) {
- return (Declaration) this.declarations;
+ return (Declaration) this.declarations.get( identifier );
}
/**
@@ -378,14 +382,50 @@
}
/**
- * Add a <code>Test</code> to this rule.
+ * Add a pattern to the rule. All patterns are searched for bindings which are then added to the rule
+ * as declarations
*
* @param condition
* The <code>Test</code> to add.
+ * @throws InvalidRuleException
*/
- public void addPattern(ConditionalElement ce) {
+ public void addPattern(ConditionalElement ce) throws InvalidRuleException {
+ addDeclarations( ce );
this.headPattern.addChild( ce );
}
+
+ public void addPattern(Column column) throws InvalidRuleException {
+ addDeclarations( column );
+ this.headPattern.addChild( column );
+ }
+
+ private void addDeclarations(Column column) throws InvalidRuleException {
+ // Check if the column is bound and if so add it as a declaration
+ if ( column.getBinding() != null ) {
+ ColumnBinding binding = (ColumnBinding ) column.getBinding();
+ addDeclaration( binding.getIdentifier(), column.getIndex(), new ColumnExtractor( new ClassObjectType( Object.class ) ) );
+ }
+
+ // Check if there are any bound fields and if so add it as a declaration
+ for ( Iterator constraintIter = column.getConstraints().iterator(); constraintIter.hasNext(); ) {
+ Constraint constraint = ( Constraint ) constraintIter.next();
+ if ( constraint instanceof FieldBinding ) {
+ FieldBinding fieldBinding = ( FieldBinding ) constraint;
+ addDeclaration(fieldBinding.getIdentifier(), fieldBinding.getColumn(), fieldBinding.getExtractor() );
+ }
+ }
+ }
+
+ private void addDeclarations(ConditionalElement ce) throws InvalidRuleException {
+ for ( Iterator it = ce.getChildren().iterator(); it.hasNext(); ) {
+ Object object = it.next();
+ if ( object instanceof Column ) {
+ addDeclarations( (Column) object );
+ } else if ( object instanceof ConditionalElement ) {
+ addDeclarations( (ConditionalElement) object );
+ }
+ }
+ }
/**
* Retrieve the <code>List</code> of <code>Conditions</code> for this
Modified: trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/ClassObjectType.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/ClassObjectType.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/ClassObjectType.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -41,6 +41,8 @@
*
*/
+import java.util.Arrays;
+
/**
* Java class semantics <code>ObjectType</code>.
*
@@ -57,6 +59,8 @@
/** Java object class. */
protected Class objectTypeClass;
+
+ protected int valueType;
// ------------------------------------------------------------
// Constructors
@@ -81,7 +85,7 @@
*
* @return The Java object class.
*/
- public Class getType() {
+ public Class getClassType() {
return this.objectTypeClass;
}
@@ -100,8 +104,12 @@
* object type, else <code>false</code>.
*/
public boolean matches(Object object) {
- return getType().isInstance( object );
+ return getClassType().isInstance( object );
}
+
+ public int getValueType() {
+ return this.valueType;
+ }
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// java.lang.Object
@@ -113,8 +121,32 @@
* @return The hash.
*/
public int hashCode() {
- return getType().hashCode();
+ return getClassType().hashCode();
}
+
+ protected void setValueType(Class clazz) {
+ if ( clazz == Character.class ) {
+ this.valueType = Evaluator.CHAR_TYPE;
+ } else if ( clazz == Byte.class ) {
+ this.valueType = Evaluator.BYTE_TYPE;
+ } else if (clazz == Short.class ) {
+ this.valueType = Evaluator.SHORT_TYPE;
+ } else if (clazz == Integer.class ) {
+ this.valueType = Evaluator.INTEGER_TYPE;
+ } else if (clazz == Long.class) {
+ this.valueType = Evaluator.LONG_TYPE;
+ } else if (clazz == Float.class) {
+ this.valueType = Evaluator.FLOAT_TYPE;
+ } else if (clazz == Double.class) {
+ this.valueType = Evaluator.DOUBLE_TYPE;
+ } else if (clazz == java.sql.Date.class) {
+ this.valueType = Evaluator.DATE_TYPE;
+ } else if (clazz.isAssignableFrom( Object[].class )) {
+ this.valueType = Evaluator.ARRAY_TYPE;
+ } else if (clazz instanceof Object) {
+ this.valueType = Evaluator.OBJECT_TYPE;
+ }
+ }
/**
* Determine if another object is equal to this.
@@ -138,6 +170,6 @@
}
public String toString() {
- return getType().getName();
+ return getClassType().getName();
}
}
Modified: trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/DefaultKnowledgeHelper.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/DefaultKnowledgeHelper.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/DefaultKnowledgeHelper.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -78,10 +78,14 @@
public void modifyObject(Object oldObject,
Object newObject) throws FactException {
FactHandle handle = this.tuple.getFactHandleForObject( oldObject );
-
- this.tuple.getWorkingMemory().modifyObject( handle,
- newObject );
+
+ modifyObject(handle, newObject);
}
+
+ public void modifyObject(FactHandle handle,
+ Object newObject) throws FactException {
+ this.tuple.getWorkingMemory().modifyObject( handle, newObject );
+ }
public void retractObject(Object object) throws FactException {
FactHandle handle = this.tuple.getFactHandleForObject( object );
Modified: trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/Evaluator.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/Evaluator.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/Evaluator.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -14,14 +14,15 @@
// Types
public static final int CHAR_TYPE = 100;
public static final int BYTE_TYPE = 110;
- public static final int SHORT_TYPE = 130;
- public static final int INTEGER_TYPE = 140;
- public static final int LONG_TYPE = 150;
- public static final int FLOAT_TYPE = 160;
- public static final int DOUBLE_TYPE = 170;
+ public static final int SHORT_TYPE = 120;
+ public static final int INTEGER_TYPE = 130;
+ public static final int LONG_TYPE = 140;
+ public static final int FLOAT_TYPE = 150;
+ public static final int DOUBLE_TYPE = 160;
+ public static final int BOOLEAN_TYPE = 170;
public static final int DATE_TYPE = 180;
public static final int ARRAY_TYPE = 190;
- public static final int OBJECT_TYPE = 195;
+ public static final int OBJECT_TYPE = 200;
public int getType();
Modified: trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/Extractor.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/Extractor.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/Extractor.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -7,5 +7,5 @@
Serializable {
Object getValue(Object object);
- Class getValueType();
+ ObjectType getObjectType();
}
Modified: trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/KnowledgeHelper.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/KnowledgeHelper.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/KnowledgeHelper.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -44,6 +44,7 @@
import java.util.List;
import org.drools.FactException;
+import org.drools.FactHandle;
/**
* KnowledgeHelper implementation types are injected into consequenses
@@ -111,6 +112,9 @@
void modifyObject(Object oldObject,
Object newObject) throws FactException;
+ void modifyObject(FactHandle handle,
+ Object newObject) throws FactException;
+
/**
* Retracts an object from the WorkingMemory. All Activations on the Agenda
* that are cancelled should emit ActivationCancelled events.
Modified: trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/ObjectType.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/ObjectType.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/ObjectType.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -61,4 +61,6 @@
* object type, else <code>false</code>.
*/
boolean matches(Object object);
+
+ int getValueType();
}
Modified: trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/Tuple.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/Tuple.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/main/java/org/drools/spi/Tuple.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -83,6 +83,8 @@
* not a root fact object.
*/
FactHandle getFactHandleForObject(Object object);
+
+ FactHandle getFactHandleForDeclaration(Declaration declaration);
/**
* Returns a reference to the <code>WorkingMemory</code> associated with
Modified: trunk/labs/jbossrules/drools-core/src/test/java/org/drools/examples/manners/Context.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/test/java/org/drools/examples/manners/Context.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/test/java/org/drools/examples/manners/Context.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -47,9 +47,15 @@
implements
Serializable {
- public static final int START_UP = 0;
+ public static final int START_UP = 0;
+ public static final int ASSIGN_SEATS = 1;
+ public static final int MAKE_PATH = 2;
+ public static final int CHECK_DONE = 3;
+ public static final int PRINT_RESULTS = 4;
private int state;
+
+ //private Path path;
public Context(int state) {
this.state = state;
@@ -63,6 +69,10 @@
return this.state == state;
}
+ public int getState() {
+ return this.state;
+ }
+
public String toString() {
return "{state=" + this.state + "}";
}
Modified: trunk/labs/jbossrules/drools-core/src/test/java/org/drools/examples/manners/Guest.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/test/java/org/drools/examples/manners/Guest.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/test/java/org/drools/examples/manners/Guest.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -48,45 +48,33 @@
public class Guest
implements
Serializable {
- private String name;
+ private final String name;
- private char sex;
+ private final Sex sex;
- private List hobbies;
+ private final Hobby hobby;
public Guest(String name,
- char sex) {
+ Sex sex,
+ Hobby hobby) {
this.name = name;
this.sex = sex;
- this.hobbies = new ArrayList();
+ this.hobby = hobby;
}
public String getName() {
return this.name;
}
- public void addHobby(String hobby) {
- this.hobbies.add( hobby );
+ public Hobby getHobby() {
+ return this.hobby;
}
+
+ public Sex getSex() {
+ return this.sex;
+ }
- public List getHobbies() {
- return this.hobbies;
- }
-
- public boolean hasOppositeSex(Guest guest) {
- return this.sex != guest.sex;
- }
-
- public boolean hasSameHobby(Guest guest) {
- boolean hobbyFound = false;
- for ( int i = 0; !hobbyFound && i < this.hobbies.size(); i++ ) {
- String hobby = (String) this.hobbies.get( i );
- hobbyFound = guest.hobbies.contains( hobby );
- }
- return hobbyFound;
- }
-
public String toString() {
- return "{name=" + this.name + ",sex=" + this.sex + ",hobbies=" + this.hobbies + "}";
+ return "{name=" + this.name + ",sex=" + this.sex + ",hobbies=" + this.hobby + "}";
}
}
\ No newline at end of file
Modified: trunk/labs/jbossrules/drools-core/src/test/java/org/drools/examples/manners/MannersTest.java
===================================================================
--- trunk/labs/jbossrules/drools-core/src/test/java/org/drools/examples/manners/MannersTest.java 2006-01-06 22:44:34 UTC (rev 2009)
+++ trunk/labs/jbossrules/drools-core/src/test/java/org/drools/examples/manners/MannersTest.java 2006-01-07 02:17:23 UTC (rev 2010)
@@ -1,5 +1,8 @@
package org.drools.examples.manners;
+import java.beans.IntrospectionException;
+import java.beans.Introspector;
+import java.beans.PropertyDescriptor;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.StringWriter;
@@ -7,14 +10,36 @@
import java.util.List;
import java.util.Random;
+import org.drools.Cheese;
+import org.drools.FactException;
+import org.drools.WorkingMemory;
+import org.drools.rule.And;
+import org.drools.rule.BoundVariableConstraint;
import org.drools.rule.Column;
import org.drools.rule.ColumnBinding;
+import org.drools.rule.Declaration;
+import org.drools.rule.EvaluatorFactory;
+import org.drools.rule.FieldBinding;
+import org.drools.rule.InvalidRuleException;
import org.drools.rule.LiteralConstraint;
+import org.drools.rule.Not;
import org.drools.rule.Rule;
import org.drools.rule.RuleSet;
+import org.drools.spi.Activation;
+import org.drools.spi.ClassFieldExtractor;
import org.drools.spi.ClassObjectType;
import org.drools.spi.BaseEvaluator;
+import org.drools.spi.Consequence;
+import org.drools.spi.ConsequenceException;
+import org.drools.spi.Constraint;
+import org.drools.spi.DefaultKnowledgeHelper;
+import org.drools.spi.Evaluator;
+import org.drools.spi.Field;
+import org.drools.spi.FieldExtractor;
+import org.drools.spi.KnowledgeHelper;
import org.drools.spi.LiteralExpressionConstraint;
+import org.drools.spi.MockField;
+import org.drools.spi.Tuple;
public class MannersTest {
/** Number of guests at the dinner (default: 16). */
@@ -33,47 +58,852 @@
private ClassObjectType guestType;
private ClassObjectType seatingType;
private ClassObjectType lastSeatType;
+ private ClassObjectType countType;
+ private ClassObjectType pathType;
+ private ClassObjectType chosenType;
+ private Evaluator objectEqualEvaluator;
+ private Evaluator objectNotEqualEvaluator;
+ private Evaluator integerEqualEvaluator;
+ private Evaluator integerNotEqualEvaluator;
+ private Evaluator booleanEqualEvaluator;
+ private Evaluator booleanNotEqualEvaluator;
protected void setUp() throws Exception {
- contextType = new ClassObjectType( Context.class );
- guestType = new ClassObjectType( Guest.class );
- seatingType = new ClassObjectType( Seating.class );
- lastSeatType = new ClassObjectType( LastSeat.class );
+ this.contextType = new ClassObjectType( Context.class );
+ this.guestType = new ClassObjectType( Guest.class );
+ this.seatingType = new ClassObjectType( Seating.class );
+ this.lastSeatType = new ClassObjectType( LastSeat.class );
+ this.countType = new ClassObjectType( Count.class );
+ this.pathType = new ClassObjectType( Path.class );
+ this.chosenType = new ClassObjectType( Chosen.class );
+ this.integerEqualEvaluator = EvaluatorFactory.getInstance().getEvaluator( Evaluator.INTEGER_TYPE,
+ Evaluator.EQUAL );
+ this.integerNotEqualEvaluator = EvaluatorFactory.getInstance().getEvaluator( Evaluator.INTEGER_TYPE,
+ Evaluator.NOT_EQUAL );
+
+ this.objectEqualEvaluator = EvaluatorFactory.getInstance().getEvaluator( Evaluator.OBJECT_TYPE,
+ Evaluator.EQUAL );
+ this.objectNotEqualEvaluator = EvaluatorFactory.getInstance().getEvaluator( Evaluator.OBJECT_TYPE,
+ Evaluator.NOT_EQUAL );
+
+ this.booleanEqualEvaluator = EvaluatorFactory.getInstance().getEvaluator( Evaluator.BOOLEAN_TYPE,
+ Evaluator.EQUAL );
+ this.booleanNotEqualEvaluator = EvaluatorFactory.getInstance().getEvaluator( Evaluator.BOOLEAN_TYPE,
+ Evaluator.NOT_EQUAL );
+
RuleSet ruleSet = new RuleSet( "Miss Manners" );
Rule assignFirstSeat = getAssignFirstSeatRule();
}
- private Rule getAssignFirstSeatRule() {
- Rule rule = new Rule( "assignFirstSeat" );
+ /**
+ * <pre>
+ * rule assignFirstSeat() {
+ * Context context;
+ * Guest guest;
+ * Count count;
+ * when {
+ * context : Context( state == Context.START_UP )
+ * guest : Guest()
+ * count : Count()
+ * } then {
+ * String guestName = guest.getName();
+ * drools.assert( new Seating( count.getValue(), 1, true, 1, guestName, 1, guestName) );
+ * drools.assert( new Path( count.getValue(), 1, guestName ) );
+ * count.setCount( count.getValue() + 1 );
+ *
+ * System.out.println( "seat 1 " + guest.getName() + " );
+ *
+ * context.setPath( Context.ASSIGN_SEATS );
+ * }
+ * }
+ * </pre>
+ *
+ *
+ * @return
+ * @throws IntrospectionException
+ * @throws InvalidRuleException
+ */
+ private Rule getAssignFirstSeatRule() throws IntrospectionException,
+ InvalidRuleException {
+ final Rule rule = new Rule( "assignFirstSeat" );
- Column context = new Column( 0,
- contextType,
- "context" );
+ // -----------
+ // context : Context( state == Context.START_UP )
+ // -----------
+ Column contextColumn = new Column( 0,
+ contextType,
+ "context" );
-// LiteralExpressionConstraint isCheddar = new LiteralExpressionConstraint() {
-//
-// public boolean isAllowed(Object object,
-// BaseEvaluator comparator) {
-// Context context = (Context) object;
-// return comparator.compare( context,
-// Context.START_UP );
-// }
-//
-// };
+ contextColumn.addConstraint( getLiteralConstraint( contextColumn,
+ "state",
+ new Integer( Context.START_UP ),
+ this.integerEqualEvaluator ) );
- /*
- * Creates a constraint with the given expression
- */
-// LiteralConstraint constraint0 = new LiteralConstraint( isCheddar,
-// new ObjectConstraintComparator( BaseEvaluator.EQUAL ) );
+ rule.addPattern( contextColumn );
- // context.
+ final Declaration contextDeclaration = rule.getDeclaration( "context" );
+ // -----------
+ // guest: Guest()
+ // -----------
+ Column guestColumn = new Column( 1,
+ guestType,
+ "guest" );
+
+ rule.addPattern( guestColumn );
+
+ final Declaration guestDeclaration = rule.getDeclaration( "guest" );
+
+ // ------------
+ // count : Count()
+ // ------------
+ Column countColumn = new Column( 2,
+ countType,
+ "count" );
+
+ rule.addPattern( countColumn );
+
+ final Declaration countDeclaration = rule.getDeclaration( "count" );
+
+ Consequence consequence = new Consequence() {
+
+ public void invoke(Activation activation) throws ConsequenceException {
+ try {
+ Rule rule = activation.getRule();
+ Tuple tuple = activation.getTuple();
+ KnowledgeHelper drools = new DefaultKnowledgeHelper( rule,
+ tuple );
+
+ Guest guest = (Guest) tuple.get( guestDeclaration );
+ Context context = (Context) tuple.get( contextDeclaration );
+ Count count = (Count) tuple.get( countDeclaration );
+
+ String guestName = guest.getName();
+
+ drools.assertObject( new Seating( count.getValue(),
+ 0,
+ true,
+ 1,
+ guestName,
+ 1,
+ guestName ) );
+ drools.assertObject( new Path( count.getValue(),
+ 1,
+ guestName ) );
+
+ count.setValue( count.getValue() + 1 );
+ drools.modifyObject( tuple.getFactHandleForDeclaration( countDeclaration ),
+ count );
+
+ context.setState( Context.ASSIGN_SEATS );
+ drools.modifyObject( tuple.getFactHandleForDeclaration( contextDeclaration ),
+ context );
+ System.out.println( "leftSeat " + guestName );
+
+ } catch ( Exception e ) {
+ throw new ConsequenceException( e );
+ }
+ }
+
+ };
+
+ rule.setConsequence( consequence );
+
return rule;
}
+ /**
+ * <pre>
+ * rule makePath() {
+ * Context context;
+ * int seatingId, seatingPid, pathSeat;
+ * String pathGuestName;
+ *
+ * when {
+ * context : Context( state == Context.MAKE_PATH )
+ * Seating( seatingId:id, seatingPid:pid, pathDone == false )
+ * Path( id == seatingPid, pathGuestName:guest, pathSeat:seat )
+ * (not Path( id == seatingId, guestName == pathGuestName )
+ * } else {
+ * drools.assert( new Path( seatingId, pathSeat, pathGuestName ) );
+ *
+ * }
+ * }
+ * </pre>
+ *
+ * @return
+ * @throws IntrospectionException
+ * @throws InvalidRuleException
+ */
+ private Rule makePath() throws IntrospectionException,
+ InvalidRuleException {
+ final Rule rule = new Rule( "makePath" );
+
+ // -----------
+ // context : Context( state == Context.MAKE_PATH )
+ // -----------
+ Column contextColumn = new Column( 0,
+ contextType );
+
+ contextColumn.addConstraint( getLiteralConstraint( contextColumn,
+ "state",
+ new Integer( Context.MAKE_PATH ),
+ this.integerEqualEvaluator ) );
+
+ rule.addPattern( contextColumn );
+
+ // ---------------
+ // Seating( seatingId:id, seatingPid:pid, pathDone == false )
+ // ---------------
+ Column seatingColumn = new Column( 1,
+ seatingType );
+
+ seatingColumn.addConstraint( getFieldBinding( seatingColumn,
+ "id",
+ "seatingId" ) );
+ seatingColumn.addConstraint( getFieldBinding( seatingColumn,
+ "pid",
+ "seatingPid" ) );
+ seatingColumn.addConstraint( getLiteralConstraint( seatingColumn,
+ "pathDone",
+ new Boolean( false ),
+ booleanEqualEvaluator ) );
+
+ rule.addPattern( seatingColumn );
+
+ final Declaration seatingIdDeclaration = rule.getDeclaration( "seatingId" );
+ final Declaration seatingPidDeclaration = rule.getDeclaration( "seatingPid" );
+
+ // -----------
+ // Path( id == seatingPid, pathGuestName:guestName, pathSeat:seat )
+ // -----------
+ Column pathColumn = new Column( 2,
+ pathType );
+
+ pathColumn.addConstraint( getBoundVariableConstraint( pathColumn,
+ "id",
+ seatingPidDeclaration,
+ integerEqualEvaluator ) );
+ pathColumn.addConstraint( getFieldBinding( pathColumn,
+ "guestName",
+ "pathGuestName" ) );
+ pathColumn.addConstraint( getFieldBinding( pathColumn,
+ "seat",
+ "pathSeat" ) );
+
+ rule.addPattern( pathColumn );
+
+ final Declaration pathGuestNameDeclaration = rule.getDeclaration( "pathGuestName" );
+ final Declaration pathSeatDeclaration = rule.getDeclaration( "pathSeat" );
+ // -------------
+ // (not Path( id == seatingId, guestName == pathGuestName )
+ // -------------
+ Column notPathColumn = new Column( 3,
+ pathType );
+
+ notPathColumn.addConstraint( getBoundVariableConstraint( notPathColumn,
+ "id",
+ seatingIdDeclaration,
+ integerEqualEvaluator ) );
+ notPathColumn.addConstraint( getBoundVariableConstraint( notPathColumn,
+ "guestName",
+ pathGuestNameDeclaration,
+ objectEqualEvaluator ) );
+
+ Not not = new Not();
+
+ not.addChild( notPathColumn );
+ notPathColumn.addConstraint( not );
+
+ rule.addPattern( notPathColumn );
+
+ // ------------
+ // drools.assert( new Path( id, pathName, pathSeat ) );
+ // ------------
+ Consequence consequence = new Consequence() {
+
+ public void invoke(Activation activation) throws ConsequenceException {
+ try {
+ Rule rule = activation.getRule();
+ Tuple tuple = activation.getTuple();
+ KnowledgeHelper drools = new DefaultKnowledgeHelper( rule,
+ tuple );
+
+ int id = ((Integer) tuple.get( seatingIdDeclaration )).intValue();
+ String guestName = (String) tuple.get( pathGuestNameDeclaration );
+ int seat = ((Integer) tuple.get( pathSeatDeclaration )).intValue();
+
+ drools.assertObject( new Path( id,
+ seat,
+ guestName ) );
+ } catch ( Exception e ) {
+ throw new ConsequenceException( e );
+ }
+ }
+
+ };
+
+ rule.setConsequence( consequence );
+
+ return rule;
+ }
+
+ /**
+ * <pre>
+ * rule findSeating() {
+ * Context context;
+ * int seatingId, seatingPid;
+ * String seatingRightGuestName, leftGuestName;
+ * Sex rightGuestSex;
+ * Hobby rightGuestHobby;
+ * Count count;
+ *
+ * when {
+ * context : Context( state == Context.ASSIGN_SEATS )
+ * Seating( seatingId:id, seatingPid:pid, pathDone == true
+ * seatingRightGuestName:rightGuestName )
+ * Guest( name == seatingRightGuestName, rightGuestSex:sex, rightGuestHobby:hobby )
+ * Guest( leftGuestName:name , sex != rightGuestSex, hobby == rightGuestHobby )
+ *
+ * count : Count()
+ *
+ * not ( Path( id == seatingId, guestName == leftGuestName) )
+ * not ( Chosen( id == seatingId, guestName == leftGuestName, hobby == rightGuestHobby) )
+ * } then {
+ * int newSeat = rightSeat + 1;
+ * drools.assert( new Seating( coung.getValue(), rightSeat, rightSeatName, leftGuestName, newSeat, countValue, id, false );
+ * drools.assert( new Path( countValue, leftGuestName, newSeat );
+ * drools.assert( new Chosen( id, leftGuestName, rightGuestHobby ) );
+ *
+ * System.out.println( "seat " + rightSeat + " " + rightSeatName + " " + leftGuestName );
+ *
+ * count.setCount( countValue + 1 );
+ * context.setPath( Context.MAKE_PATH );
+ * }
+ * }
+ * </pre>
+ *
+ * @return
+ * @throws IntrospectionException
+ * @throws InvalidRuleException
+ */
+ private Rule findSeating() throws IntrospectionException,
+ InvalidRuleException {
+ final Rule rule = new Rule( "makePath" );
+
+ // ---------------
+ // context : Context( state == Context.ASSIGN_SEATS )
+ // ---------------
+ Column contextColumn = new Column( 0,
+ contextType,
+ "context" );
+
+ contextColumn.addConstraint( getLiteralConstraint( contextColumn,
+ "state",
+ new Integer( Context.ASSIGN_SEATS ),
+ this.integerEqualEvaluator ) );
+
+ rule.addPattern( contextColumn );
+
+ final Declaration contextDeclaration = rule.getDeclaration( "context" );
+
+ // -------------------------------
+ // Seating( seatingId:id, seatingPid:pid, pathDone == true
+ // seatingRightSeat:rightSeat
+ // seatingRightGuestName:rightGuestName )
+ // -------------------------------
+ Column seatingColumn = new Column( 1,
+ seatingType );
+
+ seatingColumn.addConstraint( getFieldBinding( seatingColumn,
+ "id",
+ "seatingId" ) );
+ seatingColumn.addConstraint( getFieldBinding( seatingColumn,
+ "pid",
+ "seatingPid" ) );
+ seatingColumn.addConstraint( getLiteralConstraint( seatingColumn,
+ "pathDone",
+ new Boolean( true ),
+ this.booleanEqualEvaluator ) );
+ seatingColumn.addConstraint( getFieldBinding( seatingColumn,
+ "rightSeat",
+ "seatingRightSeat" ) );
+ seatingColumn.addConstraint( getFieldBinding( seatingColumn,
+ "rightGuestName",
+ "seatingRightGuestName" ) );
+
+ rule.addPattern( seatingColumn );
+
+ final Declaration seatingIdDeclaration = rule.getDeclaration( "seatingId" );
+ final Declaration seatingPidDeclaration = rule.getDeclaration( "seatingPid" );
+ final Declaration seatingRightGuestNameDeclaration = rule.getDeclaration( "seatingRightGuestName" );
+ final Declaration seatingRightSeatDeclaration = rule.getDeclaration( "seatingRightSeat" );
+ // --------------
+ // Guest( name == seatingRightGuestName, rightGuestSex:sex,
+ // rightGuestHobby:hobby )
+ // ---------------
+ Column rightGuestColumn = new Column( 2,
+ guestType );
+
+ rightGuestColumn.addConstraint( getBoundVariableConstraint( rightGuestColumn,
+ "name",
+ seatingRightGuestNameDeclaration,
+ objectEqualEvaluator ) );
+
+ rightGuestColumn.addConstraint( getFieldBinding( rightGuestColumn,
+ "sex",
+ "rightGuestSex" ) );
+
+ rightGuestColumn.addConstraint( getFieldBinding( rightGuestColumn,
+ "hobby",
+ "rightGuestHobby" ) );
+
+ rule.addPattern( rightGuestColumn );
+
+ final Declaration rightGuestSexDeclaration = rule.getDeclaration( "rightGuestSex" );
+ final Declaration rightGuestHobbyDeclaration = rule.getDeclaration( "rightGuestHobby" );
+
+ // ----------------
+ // Guest( leftGuestName:name , sex != rightGuestSex, hobby == rightGuestHobby )
+ // ----------------
+ Column leftGuestColumn = new Column( 3,
+ guestType );
+
+ leftGuestColumn.addConstraint( getFieldBinding( leftGuestColumn,
+ "name",
+ "leftGuestHobby" ) );
+
+ leftGuestColumn.addConstraint( getBoundVariableConstraint( leftGuestColumn,
+ "sex",
+ rightGuestSexDeclaration,
+ objectEqualEvaluator ) );
+
+ leftGuestColumn.addConstraint( getBoundVariableConstraint( rightGuestColumn,
+ "hobby",
+ rightGuestHobbyDeclaration,
+ objectEqualEvaluator ) );
+ rule.addPattern( leftGuestColumn );
+ final Declaration leftGuestNameDeclaration = rule.getDeclaration( "lefttGuestName" );
+
+ // ---------------
+ // count : Count()
+ // ---------------
+ Column count = new Column( 2,
+ countType,
+ "count" );
+
+ rule.addPattern( count );
+
+ final Declaration countDeclaration = rule.getDeclaration( "count" );
+
+ // --------------
+ // not ( Path( id == seatingId, guestName == leftGuestName) )
+ // not ( Chosen( id == seatingId, guestName == leftGuestName, hobby == rightGuestHobby) )
+ // --------------
+ Column notPathColumn = new Column( 3,
+ pathType );
+
+ notPathColumn.addConstraint( getBoundVariableConstraint( notPathColumn,
+ "id",
+ seatingIdDeclaration,
+ integerEqualEvaluator ) );
+
+ notPathColumn.addConstraint( getBoundVariableConstraint( notPathColumn,
+ "guestName",
+ leftGuestNameDeclaration,
+ objectEqualEvaluator ) );
+ Not not = new Not();
+ not.addChild( notPathColumn );
+ notPathColumn.addConstraint( not );
+ // ------------
+ // not ( Chosen( id == seatingId, guestName == leftGuestName, hobby == rightGuestHobby ) )
+ // ------------
+ Column notChosenColumn = new Column( 4,
+ chosenType );
+
+ notChosenColumn.addConstraint( getBoundVariableConstraint( notChosenColumn,
+ "id",
+ seatingIdDeclaration,
+ integerEqualEvaluator ) );
+
+ notChosenColumn.addConstraint( getBoundVariableConstraint( notChosenColumn,
+ "guestName",
+ leftGuestNameDeclaration,
+ objectEqualEvaluator ) );
+
+ notChosenColumn.addConstraint( getBoundVariableConstraint( notChosenColumn,
+ "hobby",
+ rightGuestHobbyDeclaration,
+ objectEqualEvaluator ) );
+
+ notChosenColumn.addConstraint( notChosenColumn );
+
+ rule.addPattern( notChosenColumn );
+
+ // ------------
+ // int newSeat = rightSeat + 1;
+ // drools.assert( new Seating( coung.getValue(), rightSeat,
+ // rightSeatName, leftGuestName, newSeat, countValue, id, false );
+ // drools.assert( new Path( countValue, leftGuestName, newSeat );
+ // drools.assert( new Chosen( id, leftGuestName, rightGuestHobby ) );
+ //
+ // System.out.println( "seat " + rightSeat + " " + rightSeatName + " " +
+ // leftGuestName );
+ //
+ // count.setCount( countValue + 1 );
+ // context.setPath( Context.MAKE_PATH );
+ // ------------
+ Consequence consequence = new Consequence() {
+
+ public void invoke(Activation activation) throws ConsequenceException {
+ try {
+ Rule rule = activation.getRule();
+ Tuple tuple = activation.getTuple();
+ KnowledgeHelper drools = new DefaultKnowledgeHelper( rule,
+ tuple );
+
+ Context context = (Context) tuple.get( contextDeclaration );
+ Count count = (Count) tuple.get( countDeclaration );
+ int seatId = ((Integer) tuple.get( seatingIdDeclaration )).intValue();
+ int seatingRightSeat = ((Integer) tuple.get( seatingRightSeatDeclaration )).intValue();
+ String leftGuestName = (String) tuple.get( leftGuestNameDeclaration );
+ String rightGuestName = (String) tuple.get( seatingRightGuestNameDeclaration );
+ Hobby rightGuestHobby = (Hobby) tuple.get( rightGuestHobbyDeclaration );
+
+ drools.assertObject( new Seating( count.getValue(),
+ seatId,
+ false,
+ seatingRightSeat,
+ leftGuestName,
+ seatingRightSeat + 1,
+ rightGuestName ) );
+
+ drools.assertObject( new Path( count.getValue(),
+ seatingRightSeat + 1,
+ leftGuestName ) );
+
+ drools.assertObject( new Chosen( seatId,
+ leftGuestName,
+ rightGuestHobby ) );
+
+ count.setValue( count.getValue() + 1 );
+ drools.modifyObject( tuple.getFactHandleForDeclaration( countDeclaration ),
+ count );
+
+ context.setState( Context.MAKE_PATH );
+ drools.modifyObject( tuple.getFactHandleForDeclaration( contextDeclaration ),
+ context );
+
+ } catch ( Exception e ) {
+ throw new ConsequenceException( e );
+ }
+ }
+
+ };
+
+ rule.setConsequence( consequence );
+
+ return rule;
+ }
+
+ /**
+ *
+ * rule pathDone() {
+ * Context context;
+ * Seating seating;
+ * when {
+ * context : Context( state == Context.MAKE_PATH )
+ * seating : Seating( pathDone == false )
+ * } then {
+ * seating.setPathDone( true );
+ * context.setName( Context.CHECK_DONE );
+ * }
+ * }
+ *
+ *
+ * @return
+ * @throws IntrospectionException
+ * @throws InvalidRuleException
+ */
+ private Rule pathDone() throws IntrospectionException,
+ InvalidRuleException {
+ final Rule rule = new Rule( "makePath" );
+
+ // -----------
+ // context : Context( state == Context.MAKE_PATH )
+ // -----------
+ Column contextColumn = new Column( 0,
+ contextType );
+
+ contextColumn.addConstraint( getLiteralConstraint( contextColumn,
+ "state",
+ new Integer( Context.MAKE_PATH ),
+ this.integerEqualEvaluator ) );
+
+ rule.addPattern( contextColumn );
+ final Declaration contextDeclaration = rule.getDeclaration( "context" );
+
+ // ---------------
+ // seating : Seating( pathDone == false )
+ // ---------------
+ Column seatingColumn = new Column( 1,
+ seatingType,
+ "seating" );
+
+ seatingColumn.addConstraint( getLiteralConstraint( seatingColumn,
+ "pathDone",
+ new Boolean( false ),
+ booleanEqualEvaluator ) );
+
+ rule.addPattern( seatingColumn );
+
+ final Declaration seatingDeclaration = rule.getDeclaration( "seating" );
+
+ // ------------
+ // context.setName( Context.CHECK_DONE );
+ // seating.setPathDone( true );
+ // ------------
+ Consequence consequence = new Consequence() {
+
+ public void invoke(Activation activation) throws ConsequenceException {
+ try {
+ Rule rule = activation.getRule();
+ Tuple tuple = activation.getTuple();
+ KnowledgeHelper drools = new DefaultKnowledgeHelper( rule,
+ tuple );
+
+ Context context = (Context) tuple.get( contextDeclaration );
+ Seating seating = (Seating) tuple.get( seatingDeclaration );
+
+ seating.setPathDone( true );
+ drools.modifyObject( tuple.getFactHandleForDeclaration( seatingDeclaration ),
+ seating );
+
+ context.setState( Context.CHECK_DONE );
+ drools.modifyObject( tuple.getFactHandleForDeclaration( contextDeclaration ),
+ context );
+ } catch ( Exception e ) {
+ throw new ConsequenceException( e );
+ }
+ }
+
+ };
+
+ rule.setConsequence( consequence );
+
+ return rule;
+ }
+
+ /**
+ *
+ * rule areWeDone() {
+ * Context context;
+ * LastSeat lastSear;
+ * when {
+ * context : Context( state == Context.CHECK_DONE )
+ * LastSeat( lastSeat: seat )
+ * Seating( seat == lastSeat )
+ * } then {
+ * context.setState( Context.PRINT_RESULTS );
+ * }
+ * }
+ *
+ *
+ * @return
+ * @throws IntrospectionException
+ * @throws InvalidRuleException
+ */
+ private Rule areWeDone() throws IntrospectionException,
+ InvalidRuleException {
+ final Rule rule = new Rule( "areWeDone" );
+
+ // -----------
+ // context : Context( state == Context.CHECK_DONE )
+ // -----------
+ Column contextColumn = new Column( 0,
+ contextType );
+
+ contextColumn.addConstraint( getLiteralConstraint( contextColumn,
+ "state",
+ new Integer( Context.CHECK_DONE ),
+ this.integerEqualEvaluator ) );
+
+ rule.addPattern( contextColumn );
+ final Declaration contextDeclaration = rule.getDeclaration( "context" );
+
+ // ---------------
+ // LastSeat( lastSeat: seat )
+ // ---------------
+ Column lastSeatColumn = new Column( 1,
+ lastSeatType,
+ null );
+
+ lastSeatColumn.addConstraint( getFieldBinding( lastSeatColumn,
+ "seat",
+ "lastSeat" ) );
+ rule.addPattern( lastSeatColumn );
+ final Declaration lastSeatDeclaration = rule.getDeclaration( "lastSeat" );
+ // -------------
+ // Seating( seat == lastSeat )
+ // -------------
+ Column seatingColumn = new Column( 2,
+ seatingType,
+ null );
+
+ seatingColumn.addConstraint( getBoundVariableConstraint( seatingColumn,
+ "seat",
+ lastSeatDeclaration,
+ integerEqualEvaluator ) );
+
+ rule.addPattern( seatingColumn );
+
+ // ------------
+ // context.setName(...
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