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[Jboss-svn-commits] JBL Code SVN: r3751 - in labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools: . xml
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From: <jbo...@li...> - 2006-04-18 00:13:30
|
Author: mar...@jb...
Date: 2006-04-17 20:13:18 -0400 (Mon, 17 Apr 2006)
New Revision: 3751
Added:
labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/
labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/BaseAbstractHandler.java
labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/Configuration.java
labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/DefaultConfiguration.java
labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/Dummy.java
labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/FunctionHandler.java
labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/GlobalDummy.java
labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/GlobalHandler.java
labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/Handler.java
labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/ImportEntryDummy.java
labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/ImportHandler.java
labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/PackageHandler.java
labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/PackageReader.java
Log:
JBRULES-61 XML Parser
-Migrate RuleSetReader to work as PackageReader
Added: labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/BaseAbstractHandler.java
===================================================================
--- labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/BaseAbstractHandler.java 2006-04-17 23:56:20 UTC (rev 3750)
+++ labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/BaseAbstractHandler.java 2006-04-18 00:13:18 UTC (rev 3751)
@@ -0,0 +1,30 @@
+package org.drools.xml;
+
+import java.util.Set;
+
+/**
+ * @author mproctor
+ *
+ */
+abstract class BaseAbstractHandler
+{
+ protected PackageReader packageReader;
+ protected Set validPeers;
+ protected Set validParents;
+ protected boolean allowNesting;
+
+ public Set getValidParents()
+ {
+ return this.validParents;
+ }
+
+ public Set getValidPeers()
+ {
+ return this.validPeers;
+ }
+
+ public boolean allowNesting()
+ {
+ return this.allowNesting;
+ }
+}
\ No newline at end of file
Added: labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/Configuration.java
===================================================================
--- labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/Configuration.java 2006-04-17 23:56:20 UTC (rev 3750)
+++ labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/Configuration.java 2006-04-18 00:13:18 UTC (rev 3751)
@@ -0,0 +1,88 @@
+package org.drools.xml;
+
+/**
+ * Configuration passed to a configurable <code>SemanticComponent</code>.
+ *
+ * <p>
+ * A <code>Configuration</code> may actually form a tree-shaped structure in
+ * order to hold complex configuration data. Each node in the tree is
+ * represented by a <code>Configuration</code> object that has a name and may
+ * contain attributes, children and text.
+ * </p>
+ *
+ * @author <a href="mailto:bo...@we...">bob mcwhirter </a>
+ *
+ * @version $Id: Configuration.java,v 1.5 2005/01/23 18:16:20 mproctor Exp $
+ */
+public interface Configuration
+{
+ // ----------------------------------------------------------------------
+ // Constants
+ // ----------------------------------------------------------------------
+
+ /** Empty <code>Configuration</code> array. */
+ Configuration[] EMPTY_ARRAY = new Configuration[0];
+
+ // ----------------------------------------------------------------------
+ // Interface
+ // ----------------------------------------------------------------------
+
+ /**
+ * Retrieve the node name.
+ *
+ * @return The node name.
+ */
+ String getName();
+
+ /**
+ * Retrieve the node text.
+ *
+ * @return The node text.
+ */
+ String getText();
+
+ /**
+ * Retrieve an attribute value.
+ *
+ * @param name The attribute name.
+ *
+ * @return The attribute value or <code>null</code> if no attribute
+ * matches the specified name.
+ */
+ String getAttribute(String name);
+
+ /**
+ * Retrieve all attribute names.
+ *
+ * @return The attribute names.
+ */
+ String[] getAttributeNames();
+
+ /**
+ * Retrieve a child node.
+ *
+ * @param name The child name.
+ *
+ * @return The first child matching the specified name, otherwise
+ * <code>null</code> if none match.
+ */
+ Configuration getChild(String name);
+
+ /**
+ * Retrieve children nodes.
+ *
+ * @param name The child name.
+ *
+ * @return All children matching the specified name, otherwise an empty
+ * array if none match.
+ */
+ Configuration[] getChildren(String name);
+
+ /**
+ * Retrieve all children nodes.
+ *
+ * @return All children nodes, otherwise an empty array if this node
+ * contains no children.
+ */
+ Configuration[] getChildren();
+}
Added: labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/DefaultConfiguration.java
===================================================================
--- labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/DefaultConfiguration.java 2006-04-17 23:56:20 UTC (rev 3750)
+++ labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/DefaultConfiguration.java 2006-04-18 00:13:18 UTC (rev 3751)
@@ -0,0 +1,159 @@
+package org.drools.xml;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Default implementation of <code>Configuration</code>.
+ *
+ * @author <a href="mailto:bo...@we...">bob mcwhirter </a>
+ *
+ * @version $Id: DefaultConfiguration.java,v 1.2 2004/09/17 00:25:09 mproctor
+ * Exp $
+ */
+public class DefaultConfiguration
+ implements
+ Configuration {
+ // ----------------------------------------------------------------------
+ // Class members
+ // ----------------------------------------------------------------------
+
+ /** Empty <code>String</code> array. */
+ private static final String[] EMPTY_STRING_ARRAY = new String[0];
+
+ // ----------------------------------------------------------------------
+ // Instance members
+ // ----------------------------------------------------------------------
+
+ /** Node name. */
+ private String name;
+
+ /** Node text. */
+ private String text = "";
+
+ /** Node attributes. */
+ private Map attrs;
+
+ /** Children nodes. */
+ private List children;
+
+ // ----------------------------------------------------------------------
+ // Constructors
+ // ----------------------------------------------------------------------
+
+ /**
+ * Construct.
+ *
+ * @param name
+ * The name of the node.
+ */
+ public DefaultConfiguration(String name) {
+ this.name = name;
+ this.attrs = new HashMap();
+ this.children = new ArrayList();
+ }
+
+ /**
+ * @see Configuration
+ */
+ public String getName() {
+ return this.name;
+ }
+
+ /**
+ * Set the node text.
+ *
+ * @param text
+ * The text.
+ */
+ public void setText(String text) {
+ this.text = text;
+ }
+
+ /**
+ * @see Configuration
+ */
+ public String getText() {
+ return this.text;
+ }
+
+ /**
+ * Set an attribute value.
+ *
+ * @param name
+ * The attribute name.
+ * @param value
+ * The attribute value.
+ */
+ public void setAttribute(String name,
+ String value) {
+ this.attrs.put( name,
+ value );
+ }
+
+ /**
+ * @see Configuration
+ */
+ public String getAttribute(String name) {
+ return (String) this.attrs.get( name );
+ }
+
+ /**
+ * @see Configuration
+ */
+ public String[] getAttributeNames() {
+ return (String[]) this.attrs.keySet().toArray( EMPTY_STRING_ARRAY );
+ }
+
+ /**
+ * Add a child <code>Configuration</code>.
+ *
+ * @param config
+ * The child.
+ */
+ public void addChild(Configuration config) {
+ this.children.add( config );
+ }
+
+ /**
+ * @see Configuration
+ */
+ public Configuration getChild(String name) {
+ for ( Iterator childIter = this.children.iterator(); childIter.hasNext(); ) {
+ Configuration eachConfig = (Configuration) childIter.next();
+
+ if ( eachConfig.getName().equals( name ) ) {
+ return eachConfig;
+ }
+ }
+
+ return null;
+ }
+
+ /**
+ * @see Configuration
+ */
+ public Configuration[] getChildren(String name) {
+ List result = new ArrayList();
+
+ for ( Iterator childIter = this.children.iterator(); childIter.hasNext(); ) {
+ Configuration eachConfig = (Configuration) childIter.next();
+
+ if ( eachConfig.getName().equals( name ) ) {
+ result.add( eachConfig );
+ }
+ }
+
+ return (Configuration[]) result.toArray( Configuration.EMPTY_ARRAY );
+ }
+
+ /**
+ * @see Configuration
+ */
+ public Configuration[] getChildren() {
+ return (Configuration[]) this.children.toArray( Configuration.EMPTY_ARRAY );
+ }
+}
Added: labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/Dummy.java
===================================================================
--- labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/Dummy.java 2006-04-17 23:56:20 UTC (rev 3750)
+++ labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/Dummy.java 2006-04-18 00:13:18 UTC (rev 3751)
@@ -0,0 +1,5 @@
+package org.drools.xml;
+
+public class Dummy {
+
+}
Added: labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/FunctionHandler.java
===================================================================
--- labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/FunctionHandler.java 2006-04-17 23:56:20 UTC (rev 3750)
+++ labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/FunctionHandler.java 2006-04-18 00:13:18 UTC (rev 3751)
@@ -0,0 +1,86 @@
+package org.drools.xml;
+
+import java.util.HashSet;
+
+import org.drools.lang.descr.FunctionDescr;
+import org.drools.lang.descr.PackageDescr;
+import org.drools.lang.descr.RuleDescr;
+import org.xml.sax.Attributes;
+import org.xml.sax.SAXException;
+import org.xml.sax.SAXParseException;
+
+/**
+ * @author mproctor
+ *
+ * TODO To change the template for this generated type comment go to Window -
+ * Preferences - Java - Code Style - Code Templates
+ */
+class FunctionHandler extends BaseAbstractHandler implements Handler
+{
+ FunctionHandler( PackageReader packageReader )
+ {
+ this.packageReader = packageReader;
+
+ if ( (this.validParents == null) && (validPeers == null) )
+ {
+ this.validParents = new HashSet( );
+ this.validParents.add( Package.class );
+
+ this.validPeers = new HashSet( );
+ this.validPeers.add( null );
+ this.validPeers.add( ImportEntryDummy.class );
+ this.validPeers.add( GlobalDummy.class );
+ this.validPeers.add( FunctionDescr.class );
+ this.validPeers.add( RuleDescr.class );
+
+ this.allowNesting = false;
+ }
+ }
+
+ public Object start( String uri, String localName, Attributes attrs ) throws SAXException
+ {
+ packageReader.startConfiguration( localName, attrs );
+ return null;
+ }
+
+ public Object end( String uri, String localName ) throws SAXException
+ {
+ Configuration config = packageReader.endConfiguration( );
+
+ String name = config.getAttribute( "name" );
+ if ( name == null || name.trim( ).equals( "" ) )
+ {
+ throw new SAXParseException(
+ "<function> requires a 'name' attribute", packageReader.getLocator( ) );
+ }
+
+ String returnType = config.getAttribute( "returnType" );
+ if ( returnType == null || returnType.trim( ).equals( "" ) )
+ {
+ throw new SAXParseException(
+ "<function> requires a 'returnType' attribute", packageReader.getLocator( ) );
+ }
+
+
+ FunctionDescr functionDescr = new FunctionDescr(name, returnType);
+
+ Configuration[] parameters = config.getChildren( "parameter" );
+
+ for ( int i = 0, length = parameters.length; i < length; i++ ) {
+ functionDescr.addParameter( parameters[i].getAttribute( "identifier" ), parameters[i].getAttribute( "text" ) );
+ }
+
+ functionDescr.setText( config.getText() );
+
+ PackageDescr packageDescr = this.packageReader.getPackageDescr();
+
+ packageDescr.addFunction( functionDescr );
+
+ return functionDescr;
+ }
+
+ public Class generateNodeFor()
+ {
+ return FunctionDescr.class;
+ }
+}
\ No newline at end of file
Added: labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/GlobalDummy.java
===================================================================
--- labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/GlobalDummy.java 2006-04-17 23:56:20 UTC (rev 3750)
+++ labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/GlobalDummy.java 2006-04-18 00:13:18 UTC (rev 3751)
@@ -0,0 +1,5 @@
+package org.drools.xml;
+
+public class GlobalDummy extends Dummy {
+
+}
Added: labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/GlobalHandler.java
===================================================================
--- labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/GlobalHandler.java 2006-04-17 23:56:20 UTC (rev 3750)
+++ labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/GlobalHandler.java 2006-04-18 00:13:18 UTC (rev 3751)
@@ -0,0 +1,60 @@
+package org.drools.xml;
+
+import java.util.HashSet;
+
+import org.drools.lang.descr.FunctionDescr;
+import org.drools.lang.descr.PackageDescr;
+import org.drools.lang.descr.RuleDescr;
+import org.xml.sax.Attributes;
+import org.xml.sax.SAXException;
+
+/**
+ * @author mproctor
+ *
+ * TODO To change the template for this generated type comment go to Window -
+ * Preferences - Java - Code Style - Code Templates
+ */
+class GlobalHandler extends BaseAbstractHandler implements Handler
+{
+ GlobalHandler( PackageReader packageReader )
+ {
+ this.packageReader = packageReader;
+
+ if ( (this.validParents == null) && (validPeers == null) )
+ {
+ this.validParents = new HashSet( );
+ this.validParents.add( Package.class );
+
+ this.validPeers = new HashSet( );
+ this.validPeers.add( null );
+ this.validPeers.add( ImportEntryDummy.class );
+ this.validPeers.add( GlobalDummy.class );
+ this.validPeers.add( FunctionDescr.class );
+ this.validPeers.add( RuleDescr.class );
+
+ this.allowNesting = false;
+ }
+ }
+
+ public Object start( String uri, String localName, Attributes attrs ) throws SAXException
+ {
+ packageReader.startConfiguration( localName, attrs );
+ return null;
+ }
+
+ public Object end( String uri, String localName ) throws SAXException
+ {
+ Configuration config = packageReader.endConfiguration( );
+
+ PackageDescr packageDescr = this.packageReader.getPackageDescr();
+
+ packageDescr.addGlobal( config.getAttribute( "identifier" ), config.getText() );
+
+ return new GlobalDummy();
+ }
+
+ public Class generateNodeFor()
+ {
+ return GlobalDummy.class;
+ }
+}
\ No newline at end of file
Added: labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/Handler.java
===================================================================
--- labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/Handler.java 2006-04-17 23:56:20 UTC (rev 3750)
+++ labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/Handler.java 2006-04-18 00:13:18 UTC (rev 3751)
@@ -0,0 +1,28 @@
+package org.drools.xml;
+
+import java.util.Set;
+
+import org.xml.sax.Attributes;
+import org.xml.sax.SAXException;
+
+/**
+ * @author mproctor
+ *
+ * TODO To change the template for this generated type comment go to Window -
+ * Preferences - Java - Code Style - Code Templates
+ */
+interface Handler
+{
+
+ Object start( String uri, String localName, Attributes attrs ) throws SAXException;
+
+ Object end( String uri, String localName ) throws SAXException;
+
+ Set getValidParents();
+
+ Set getValidPeers();
+
+ boolean allowNesting();
+
+ Class generateNodeFor();
+}
\ No newline at end of file
Added: labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/ImportEntryDummy.java
===================================================================
--- labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/ImportEntryDummy.java 2006-04-17 23:56:20 UTC (rev 3750)
+++ labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/ImportEntryDummy.java 2006-04-18 00:13:18 UTC (rev 3751)
@@ -0,0 +1,5 @@
+package org.drools.xml;
+
+public class ImportEntryDummy extends Dummy {
+
+}
Added: labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/ImportHandler.java
===================================================================
--- labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/ImportHandler.java 2006-04-17 23:56:20 UTC (rev 3750)
+++ labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/ImportHandler.java 2006-04-18 00:13:18 UTC (rev 3751)
@@ -0,0 +1,60 @@
+package org.drools.xml;
+
+import java.util.HashSet;
+
+import org.drools.lang.descr.FunctionDescr;
+import org.drools.lang.descr.PackageDescr;
+import org.drools.lang.descr.RuleDescr;
+import org.xml.sax.Attributes;
+import org.xml.sax.SAXException;
+
+/**
+ * @author mproctor
+ *
+ * TODO To change the template for this generated type comment go to Window -
+ * Preferences - Java - Code Style - Code Templates
+ */
+class ImportHandler extends BaseAbstractHandler implements Handler
+{
+ ImportHandler( PackageReader packageReader )
+ {
+ this.packageReader = packageReader;
+
+ if ( (this.validParents == null) && (validPeers == null) )
+ {
+ this.validParents = new HashSet( );
+ this.validParents.add( Package.class );
+
+ this.validPeers = new HashSet( );
+ this.validPeers.add( null );
+ this.validPeers.add( ImportEntryDummy.class );
+ this.validPeers.add( GlobalDummy.class );
+ this.validPeers.add( FunctionDescr.class );
+ this.validPeers.add( RuleDescr.class );
+
+ this.allowNesting = false;
+ }
+ }
+
+ public Object start( String uri, String localName, Attributes attrs ) throws SAXException
+ {
+ packageReader.startConfiguration( localName, attrs );
+ return null;
+ }
+
+ public Object end( String uri, String localName ) throws SAXException
+ {
+ Configuration config = packageReader.endConfiguration( );
+
+ PackageDescr packageDescr = this.packageReader.getPackageDescr();
+
+ packageDescr.addImport( config.getText() );
+
+ return new ImportEntryDummy();
+ }
+
+ public Class generateNodeFor()
+ {
+ return ImportEntryDummy.class;
+ }
+}
\ No newline at end of file
Added: labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/PackageHandler.java
===================================================================
--- labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/PackageHandler.java 2006-04-17 23:56:20 UTC (rev 3750)
+++ labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/PackageHandler.java 2006-04-18 00:13:18 UTC (rev 3751)
@@ -0,0 +1,61 @@
+package org.drools.xml;
+
+import java.util.HashSet;
+
+import org.drools.lang.descr.PackageDescr;
+import org.xml.sax.Attributes;
+import org.xml.sax.SAXException;
+import org.xml.sax.SAXParseException;
+
+/**
+ * @author mproctor
+ *
+ * TODO To change the template for this generated type comment go to Window -
+ * Preferences - Java - Code Style - Code Templates
+ */
+class PackageHandler extends BaseAbstractHandler implements Handler
+{
+ PackageHandler( PackageReader packageReader )
+ {
+ this.packageReader = packageReader;
+
+ if ( (this.validParents == null) && (validPeers == null) )
+ {
+ this.validParents = new HashSet( );
+ this.validParents.add( null );
+
+ this.validPeers = new HashSet( );
+ this.validPeers.add( null );
+
+ this.allowNesting = false;
+ }
+ }
+
+ public Object start( String uri, String localName, Attributes attrs ) throws SAXException
+ {
+
+ String ruleSetName = attrs.getValue( "name" );
+
+ if ( ruleSetName == null || ruleSetName.trim( ).equals( "" ) )
+ {
+ throw new SAXParseException(
+ "<package> requires a 'name' attribute", packageReader.getLocator( ) );
+ }
+
+ PackageDescr packageDescr = new PackageDescr( ruleSetName.trim( ) );
+
+
+ packageReader.setPackageDescr( packageDescr );
+ return packageDescr;
+ }
+
+ public Object end( String uri, String localName ) throws SAXException
+ {
+ return null;
+ }
+
+ public Class generateNodeFor()
+ {
+ return PackageDescr.class;
+ }
+}
\ No newline at end of file
Added: labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/PackageReader.java
===================================================================
--- labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/PackageReader.java 2006-04-17 23:56:20 UTC (rev 3750)
+++ labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/xml/PackageReader.java 2006-04-18 00:13:18 UTC (rev 3751)
@@ -0,0 +1,708 @@
+package org.drools.xml;
+
+import java.io.BufferedInputStream;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.Reader;
+import java.net.URL;
+import java.text.MessageFormat;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.ListIterator;
+import java.util.Map;
+import java.util.Set;
+
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+
+import org.drools.lang.descr.PackageDescr;
+import org.drools.lang.descr.RuleDescr;
+import org.xml.sax.Attributes;
+import org.xml.sax.EntityResolver;
+import org.xml.sax.InputSource;
+import org.xml.sax.Locator;
+import org.xml.sax.SAXException;
+import org.xml.sax.SAXNotRecognizedException;
+import org.xml.sax.SAXParseException;
+import org.xml.sax.helpers.DefaultHandler;
+
+/**
+ * <code>RuleSet</code> loader.
+ *
+ * Note you can override the default entity resolver by setting the System property of:
+ * <code>org.drools.io.EntityResolve</code> to your own custom entity resolver.
+ * This can be done using -Dorg.drools.io.EntityResolver=YourClassHere on the command line, for instance.
+ *
+ * @author <a href="mailto:bo...@we...">bob mcwhirter </a>
+ */
+public class PackageReader extends DefaultHandler {
+ // ----------------------------------------------------------------------
+ // Constants
+ // ----------------------------------------------------------------------
+ public static final String ENTITY_RESOLVER_PROPERTY_NAME = "org.drools.io.EntityResolver";
+
+ /** Namespace URI for the general tags. */
+ public static final String RULES_NAMESPACE_URI = "http://drools.org/rules";
+
+ private static final String JAXP_SCHEMA_LANGUAGE = "http://java.sun.com/xml/jaxp/properties/schemaLanguage";
+
+ private static final String W3C_XML_SCHEMA = "http://www.w3.org/2001/XMLSchema";
+
+ // ----------------------------------------------------------------------
+ // Instance members
+ // ----------------------------------------------------------------------
+ /** SAX parser. */
+ private SAXParser parser;
+
+ /** isValidating */
+ private boolean isValidating = true;
+
+ /** Locator for errors. */
+ private Locator locator;
+
+ // private Map repo;
+
+ /** Stack of configurations. */
+ private LinkedList configurationStack;
+
+ /** Current configuration text. */
+ private StringBuffer characters;
+
+ private Map handlers;
+
+ private boolean lastWasEndElement;
+
+ private LinkedList parents;
+
+ private Object peer;
+
+ private Object current;
+
+ private PackageDescr packageDescr;
+
+ private boolean inHandledRuleSubElement;
+
+ private MessageFormat message = new MessageFormat( "({0}: {1}, {2}): {3}" );
+
+ private Map namespaces = new HashMap();
+
+ EntityResolver entityResolver;
+
+ // ----------------------------------------------------------------------
+ // Constructors
+ // ----------------------------------------------------------------------
+
+ /**
+ * Construct.
+ *
+ * <p>
+ * Uses the default JAXP SAX parser and the default classpath-based
+ * <code>DefaultSemanticModule</code>.
+ * </p>
+ */
+ public PackageReader() {
+ // init
+ this.configurationStack = new LinkedList();
+ this.parents = new LinkedList();
+
+ this.handlers = new HashMap();
+ this.handlers.put( "PackageDescr",
+ null );
+ this.handlers.put( "RuleDescr",
+ null );
+ this.handlers.put( "QueryDescr",
+ null );
+ this.handlers.put( "AttributeDescr",
+ null );
+
+ this.handlers.put( "FunctionDescr",
+ null );
+
+ // Conditional Elements
+ this.handlers.put( "AndDescr",
+ null );
+ this.handlers.put( "OrDescr",
+ null );
+ this.handlers.put( "NotDescr",
+ null );
+ this.handlers.put( "ExistsDescr",
+ null );
+
+ this.handlers.put( "ColumnDescr",
+ null );
+
+ // Field Constraints
+ this.handlers.put( "LiteralDescr",
+ null );
+ this.handlers.put( "PredicateDescr",
+ null );
+ this.handlers.put( "ReturnValueDescr",
+ null );
+ this.handlers.put( "BoundVariableDescr",
+ null );
+
+ initEntityResolver();
+
+ }
+
+ /**
+ * Construct.
+ *
+ * <p>
+ * Uses the default classpath-based <code>DefaultSemanticModule</code>.
+ * </p>
+ *
+ * @param parser
+ * The SAX parser.
+ */
+ public PackageReader(SAXParser parser) {
+ this.parser = parser;
+ }
+
+ // ----------------------------------------------------------------------
+ // Instance methods
+ // ----------------------------------------------------------------------
+
+ /**
+ * Read a <code>RuleSet</code> from a <code>Reader</code>.
+ *
+ * @param reader
+ * The reader containing the rule-set.
+ *
+ * @return The rule-set.
+ */
+ public PackageDescr read(Reader reader) throws SAXException,
+ IOException {
+ return read( new InputSource( reader ) );
+ }
+
+ /**
+ * Read a <code>RuleSet</code> from an <code>InputStream</code>.
+ *
+ * @param inputStream
+ * The input-stream containing the rule-set.
+ *
+ * @return The rule-set.
+ */
+ public PackageDescr read(InputStream inputStream) throws SAXException,
+ IOException {
+ return read( new InputSource( inputStream ) );
+ }
+
+ /**
+ * Read a <code>RuleSet</code> from an <code>InputSource</code>.
+ *
+ * @param in
+ * The rule-set input-source.
+ *
+ * @return The rule-set.
+ */
+ public PackageDescr read(InputSource in) throws SAXException,
+ IOException {
+ SAXParser localParser = null;
+ if ( this.parser == null ) {
+ SAXParserFactory factory = SAXParserFactory.newInstance();
+ factory.setNamespaceAware( true );
+
+ String isValidatingString = System.getProperty( "drools.schema.validating" );
+ if ( System.getProperty( "drools.schema.validating" ) != null ) {
+ this.isValidating = Boolean.getBoolean( "drools.schema.validating" );
+ }
+
+ if ( this.isValidating == true ) {
+ factory.setValidating( true );
+ try {
+ localParser = factory.newSAXParser();
+ } catch ( ParserConfigurationException e ) {
+ throw new RuntimeException( e.getMessage() );
+ }
+
+ try {
+ localParser.setProperty( JAXP_SCHEMA_LANGUAGE,
+ W3C_XML_SCHEMA );
+ } catch ( SAXNotRecognizedException e ) {
+ boolean hideWarnings = Boolean.getBoolean( "drools.schema.hidewarnings" );
+ if ( !hideWarnings ) {
+ System.err.println( "Your SAX parser is not JAXP 1.2 compliant - turning off validation." );
+ }
+ localParser = null;
+ }
+ }
+
+ if ( localParser == null ) {
+ // not jaxp1.2 compliant so turn off validation
+ try {
+ this.isValidating = false;
+ factory.setValidating( this.isValidating );
+ localParser = factory.newSAXParser();
+ } catch ( ParserConfigurationException e ) {
+ throw new RuntimeException( e.getMessage() );
+ }
+ }
+ } else {
+ localParser = this.parser;
+ }
+
+ if ( !localParser.isNamespaceAware() ) {
+ throw new RuntimeException( "parser must be namespace-aware" );
+ }
+
+ localParser.parse( in,
+ this );
+
+ return this.packageDescr;
+ }
+
+ void setPackageDescr(PackageDescr packageDescr) {
+ this.packageDescr = packageDescr;
+ }
+
+ PackageDescr getPackageDescr() {
+ return this.packageDescr;
+ }
+ /**
+ * @see org.xml.sax.ContentHandler
+ */
+ public void setDocumentLocator(Locator locator) {
+ this.locator = locator;
+ }
+
+ /**
+ * Get the <code>Locator</code>.
+ *
+ * @return The locator.
+ */
+ public Locator getLocator() {
+ return this.locator;
+ }
+
+ public void startDocument() {
+ this.isValidating = true;
+ this.packageDescr = null;
+ this.current = null;
+ this.peer = null;
+ this.lastWasEndElement = false;
+ this.parents.clear();
+ this.characters = null;
+ this.configurationStack.clear();
+ this.namespaces.clear();
+ }
+
+ /**
+ * @param uri
+ * @param localName
+ * @param qname
+ * @param attrs
+ * @throws SAXException
+ * @see org.xml.sax.ContentHandler
+ *
+ * @todo: better way to manage unhandled elements
+ */
+ public void startElement(String uri,
+ String localName,
+ String qname,
+ Attributes attrs) throws SAXException {
+ // going down so no peer
+ if ( !this.lastWasEndElement ) {
+ this.peer = null;
+ }
+
+ Handler handler = getHandler( localName );
+
+ if ( (handler != null) && (!this.parents.isEmpty() && this.parents.getLast() instanceof RuleDescr) ) {
+ this.inHandledRuleSubElement = true;
+ }
+
+ if ( handler == null ) {
+ if ( ((this.inHandledRuleSubElement == false) && (this.parents.getLast() instanceof RuleDescr)) || (this.parents.getLast() instanceof PackageDescr) ) {
+ throw new SAXParseException( "unknown tag '" + localName + "' in namespace '" + uri + "'",
+ getLocator() );
+ }
+ // no handler so build up the configuration
+ startConfiguration( localName,
+ attrs );
+ return;
+ }
+
+ validate( uri,
+ localName,
+ handler );
+
+ Object node = handler.start( uri,
+ localName,
+ attrs );
+
+ if ( node != null ) {
+ this.parents.add( node );
+ this.current = node;
+ }
+ this.lastWasEndElement = false;
+ }
+
+ /**
+ * @param uri
+ * @param localName
+ * @param qname
+ * @throws SAXException
+ * @see org.xml.sax.ContentHandler
+ */
+ public void endElement(String uri,
+ String localName,
+ String qname) throws SAXException {
+ Handler handler = getHandler( localName );
+
+ if ( (handler != null) && (!this.parents.isEmpty() && this.parents.getLast() instanceof RuleDescr) ) {
+ this.inHandledRuleSubElement = false;
+ }
+
+ if ( handler == null ) {
+ if ( this.configurationStack.size() >= 1 ) {
+ endConfiguration();
+ }
+ return;
+ }
+
+ this.current = getParent( handler.generateNodeFor() );
+
+ Object node = handler.end( uri,
+ localName );
+
+ // next
+ if ( node != null && !this.lastWasEndElement ) {
+ this.peer = node;
+ }
+ // up or no children
+ else if ( this.lastWasEndElement || (this.parents.getLast()).getClass().isInstance( this.current ) ) {
+ this.peer = this.parents.removeLast();
+ }
+
+ this.lastWasEndElement = true;
+ }
+
+ private void validate(String uri,
+ String localName,
+ Handler handler) throws SAXParseException {
+ boolean validParent = false;
+ boolean validPeer = false;
+ boolean invalidNesting = false;
+
+ Set validParents = handler.getValidParents();
+ Set validPeers = handler.getValidPeers();
+ boolean allowNesting = handler.allowNesting();
+
+ // get parent
+ Object parent;
+ if ( this.parents.size() != 0 ) {
+ parent = this.parents.getLast();
+ } else {
+ parent = null;
+ }
+
+ // check valid parents
+ // null parent means localname is rule-set
+ // dont process if elements are the same
+ // instead check for allowed nesting
+ Class nodeClass = getHandler( localName ).generateNodeFor();
+ if ( !nodeClass.isInstance( parent ) ) {
+ Object allowedParent;
+ Iterator it = validParents.iterator();
+ while ( !validParent && it.hasNext() ) {
+ allowedParent = it.next();
+ if ( parent == null && allowedParent == null ) {
+ validParent = true;
+ } else if ( allowedParent != null && ((Class) allowedParent).isInstance( parent ) ) {
+ validParent = true;
+ }
+ }
+ if ( !validParent ) {
+ throw new SAXParseException( "<" + localName + "> has an invalid parent element",
+ getLocator() );
+ }
+ }
+
+ // check valid peers
+ // null peer means localname is rule-set
+ Object peer = this.peer;
+
+ Object allowedPeer;
+ Iterator it = validPeers.iterator();
+ while ( !validPeer && it.hasNext() ) {
+ allowedPeer = it.next();
+ if ( peer == null && allowedPeer == null ) {
+ validPeer = true;
+ } else if ( allowedPeer != null && ((Class) allowedPeer).isInstance( peer ) ) {
+ validPeer = true;
+ }
+ }
+ if ( !validPeer ) {
+ throw new SAXParseException( "<" + localName + "> is after an invalid element",
+ getLocator() );
+ }
+
+ if ( !allowNesting ) {
+ it = this.parents.iterator();
+ while ( !invalidNesting && it.hasNext() ) {
+ if ( nodeClass.isInstance( it.next() ) ) {
+ invalidNesting = true;
+ }
+ }
+ }
+ if ( invalidNesting ) {
+ throw new SAXParseException( "<" + localName + "> may not be nested",
+ getLocator() );
+ }
+
+ }
+
+ /**
+ * Start a configuration node.
+ *
+ * @param name
+ * Tag name.
+ * @param attrs
+ * Tag attributes.
+ */
+ protected void startConfiguration(String name,
+ Attributes attrs) {
+ this.characters = new StringBuffer();
+
+ DefaultConfiguration config = new DefaultConfiguration( name );
+
+ int numAttrs = attrs.getLength();
+
+ for ( int i = 0; i < numAttrs; ++i ) {
+ config.setAttribute( attrs.getLocalName( i ),
+ attrs.getValue( i ) );
+ }
+
+ // lets add the namespaces as attributes
+ for ( Iterator iter = namespaces.entrySet().iterator(); iter.hasNext(); ) {
+ Map.Entry entry = (Map.Entry) iter.next();
+ String ns = (String) entry.getKey();
+ String value = (String) entry.getValue();
+ if ( ns == null || ns.length() == 0 ) {
+ ns = "xmlns";
+ } else {
+ ns = "xmlns:" + ns;
+ }
+ config.setAttribute( ns,
+ value );
+ }
+
+ if ( this.configurationStack.isEmpty() ) {
+ this.configurationStack.addLast( config );
+ } else {
+ ((DefaultConfiguration) this.configurationStack.getLast()).addChild( config );
+ this.configurationStack.addLast( config );
+ }
+ }
+
+ Handler getHandler(String localName) {
+ return (Handler) this.handlers.get( localName );
+ }
+
+ /**
+ * @param chars
+ * @param start
+ * @param len
+ * @see org.xml.sax.ContentHandler
+ */
+ public void characters(char[] chars,
+ int start,
+ int len) {
+ if ( this.characters != null ) {
+ this.characters.append( chars,
+ start,
+ len );
+ }
+ }
+
+ /**
+ * End a configuration node.
+ *
+ * @return The configuration.
+ */
+ protected Configuration endConfiguration() {
+ DefaultConfiguration config = (DefaultConfiguration) this.configurationStack.removeLast();
+ if ( this.characters != null ) {
+ config.setText( this.characters.toString() );
+ }
+
+ this.characters = null;
+
+ return config;
+ }
+
+ LinkedList getParents() {
+ return this.parents;
+ }
+
+ Object getParent(Class parent) {
+ ListIterator it = this.parents.listIterator( this.parents.size() );
+ Object node = null;
+ while ( it.hasPrevious() ) {
+ node = it.previous();
+ if ( parent.isInstance( node ) ) break;
+ }
+ return node;
+ }
+
+ Object getPeer() {
+ return this.peer;
+ }
+
+ Object getCurrent() {
+ return this.current;
+ }
+
+ public InputSource resolveEntity(String publicId,
+ String systemId) throws SAXException {
+ try {
+ InputSource inputSource = resolveSchema( publicId,
+ systemId );
+ if ( inputSource != null ) {
+ return inputSource;
+ }
+ if ( entityResolver != null ) {
+ return entityResolver.resolveEntity( publicId,
+ systemId );
+ }
+ } catch ( IOException ioe ) {
+ }
+ return null;
+ }
+
+ public void startPrefixMapping(String prefix,
+ String uri) throws SAXException {
+ super.startPrefixMapping( prefix,
+ uri );
+ namespaces.put( prefix,
+ uri );
+ }
+
+ public void endPrefixMapping(String prefix) throws SAXException {
+ super.endPrefixMapping( prefix );
+ namespaces.remove( prefix );
+ }
+
+ private void print(SAXParseException x) {
+ String msg = this.message.format( new Object[]{x.getSystemId(), new Integer( x.getLineNumber() ), new Integer( x.getColumnNumber() ), x.getMessage()} );
+ System.out.println( msg );
+ }
+
+ public void warning(SAXParseException x) {
+ print( x );
+ }
+
+ public void error(SAXParseException x) {
+ print( x );
+ }
+
+ public void fatalError(SAXParseException x) throws SAXParseException {
+ print( x );
+ throw x;
+ }
+
+ private InputSource resolveSchema(String publicId,
+ String systemId) throws SAXException,
+ IOException {
+ // Schema files must end with xsd
+ if ( !systemId.toLowerCase().endsWith( "xsd" ) ) {
+ return null;
+ }
+
+ // try the actual location given by systemId
+ try {
+ URL url = new URL( systemId );
+ return new InputSource( url.openStream() );
+ } catch ( Exception e ) {
+ }
+
+ // Try and get the index for the filename, else return null
+ String xsd;
+ int index = systemId.lastIndexOf( "/" );
+ if ( index == -1 ) {
+ index = systemId.lastIndexOf( "\\" );
+ }
+ if ( index != -1 ) {
+ xsd = systemId.substring( index + 1 );
+ } else {
+ xsd = systemId;
+ }
+
+ ClassLoader cl = Thread.currentThread().getContextClassLoader();
+
+ if ( cl == null ) {
+ cl = PackageReader.class.getClassLoader();
+ }
+
+ // Try looking in META-INF
+ try {
+ return new InputSource( cl.getResourceAsStream( "META-INF/" + xsd ) );
+ } catch ( Exception e ) {
+ }
+
+ // Try looking in /META-INF
+ try {
+ return new InputSource( cl.getResourceAsStream( "/META-INF/" + xsd ) );
+ } catch ( Exception e ) {
+ }
+
+ // Try looking at root of classpath
+ try {
+ return new InputSource( cl.getResourceAsStream( "/" + xsd ) );
+ } catch ( Exception e ) {
+ }
+
+ // Try current working directory
+ try {
+ return new InputSource( new BufferedInputStream( new FileInputStream( xsd ) ) );
+ } catch ( Exception e ) {
+ }
+
+ cl = ClassLoader.getSystemClassLoader();
+
+ // Try looking in META-INF
+ try {
+ return new InputSource( cl.getResourceAsStream( "META-INF/" + xsd ) );
+ } catch ( Exception e ) {
+ }
+
+ // Try looking in /META-INF
+ try {
+ return new InputSource( cl.getResourceAsStream( "/META-INF/" + xsd ) );
+ } catch ( Exception e ) {
+ }
+
+ // Try looking at root of classpath
+ try {
+ return new InputSource( cl.getResourceAsStream( "/" + xsd ) );
+ } catch ( Exception e ) {
+ }
+
+ // Try current working directory
+ try {
+ return new InputSource( new BufferedInputStream( new FileInputStream( xsd ) ) );
+ } catch ( Exception e ) {
+ }
+ return null;
+ }
+
+ /**
+ * Intializes EntityResolver that is configured via system property ENTITY_RESOLVER_PROPERTY_NAME.
+ */
+ private void initEntityResolver() {
+ String entityResolveClazzName = System.getProperty( ENTITY_RESOLVER_PROPERTY_NAME );
+ if ( entityResolveClazzName != null && entityResolveClazzName.length() > 0 ) {
+ try {
+ Class entityResolverClazz = Thread.currentThread().getContextClassLoader().loadClass( entityResolveClazzName );
+ entityResolver = (EntityResolver) entityResolverClazz.newInstance();
+ } catch ( Exception ignoreIt ) {
+ }
+ }
+ }
+
+}
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