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[Jboss-svn-commits] JBL Code SVN: r4000 - in labs/jbossrules/trunk/drools-core/src/main/java/org/drools: reteoo util
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From: <jbo...@li...> - 2006-04-27 21:33:38
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Author: mar...@jb... Date: 2006-04-27 17:33:30 -0400 (Thu, 27 Apr 2006) New Revision: 4000 Added: labs/jbossrules/trunk/drools-core/src/main/java/org/drools/util/ReflectiveVisitor.java Removed: labs/jbossrules/trunk/drools-core/src/main/java/org/drools/reteoo/ReflectiveVisitor.java Modified: labs/jbossrules/trunk/drools-core/src/main/java/org/drools/reteoo/ReteooToJungVisitor.java Log: JBRULES-240 XMLDump and DRLDump creators -moved ReflectiveVisitor to util Deleted: labs/jbossrules/trunk/drools-core/src/main/java/org/drools/reteoo/ReflectiveVisitor.java =================================================================== --- labs/jbossrules/trunk/drools-core/src/main/java/org/drools/reteoo/ReflectiveVisitor.java 2006-04-27 21:31:33 UTC (rev 3999) +++ labs/jbossrules/trunk/drools-core/src/main/java/org/drools/reteoo/ReflectiveVisitor.java 2006-04-27 21:33:30 UTC (rev 4000) @@ -1,98 +0,0 @@ -package org.drools.reteoo; - -/* - * Copyright 2005 JBoss Inc - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -import java.lang.reflect.Method; - -import org.drools.Visitor; - -/** - * Java Tip 98: Reflect on the Visitor design pattern. Implement visitors in - * Java, using reflection. - * http://www.javaworld.com/javaworld/javatips/jw-javatip98.html - * - * @author Jeremy Blosser - */ -public abstract class ReflectiveVisitor - implements - Visitor { - static final String newline = System.getProperty( "line.separator" ); - - public void visit(Object object) { - try { - if ( object != null ) { - Method method = getMethod( object.getClass() ); - method.invoke( this, - new Object[]{object} ); - } else { - Method method = getClass().getMethod( "visitNull", - (Class[]) null ); - method.invoke( this, - (Object[]) null ); - } - } catch ( Exception e ) { - e.printStackTrace(); - } - } - - private Method getMethod(Class clazz) { - Class newClazz = clazz; - Method method = null; - - // Try the superclasses - while ( method == null && newClazz != Object.class ) { - String methodName = newClazz.getName(); - methodName = "visit" + methodName.substring( methodName.lastIndexOf( '.' ) + 1 ); - try { - method = getClass().getMethod( methodName, - new Class[]{newClazz} ); - } catch ( NoSuchMethodException e ) { - newClazz = newClazz.getSuperclass(); - } - } - - // Try the interfaces. - if ( newClazz == Object.class ) { - Class[] interfaces = clazz.getInterfaces(); - for ( int i = 0; i < interfaces.length; i++ ) { - String methodName = interfaces[i].getName(); - methodName = "visit" + methodName.substring( methodName.lastIndexOf( '.' ) + 1 ); - try { - method = getClass().getMethod( methodName, - new Class[]{interfaces[i]} ); - } catch ( NoSuchMethodException e ) { - // swallow - } - } - } - if ( method == null ) { - try { - method = getClass().getMethod( "visitObject", - new Class[]{Object.class} ); - } catch ( Exception e ) { - // Shouldn't happen as long as all Visitors extend this class - // and this class continues to implement visitObject(Object). - e.printStackTrace(); - } - } - return method; - } - - public void visitObject(Object object) { - System.err.println( "no visitor implementation for : " + object.getClass() + " : " + object ); - } -} Modified: labs/jbossrules/trunk/drools-core/src/main/java/org/drools/reteoo/ReteooToJungVisitor.java =================================================================== --- labs/jbossrules/trunk/drools-core/src/main/java/org/drools/reteoo/ReteooToJungVisitor.java 2006-04-27 21:31:33 UTC (rev 3999) +++ labs/jbossrules/trunk/drools-core/src/main/java/org/drools/reteoo/ReteooToJungVisitor.java 2006-04-27 21:33:30 UTC (rev 4000) @@ -25,6 +25,7 @@ import org.drools.rule.LiteralConstraint; import org.drools.spi.FieldValue; +import org.drools.util.ReflectiveVisitor; import org.drools.visualize.ReteooJungViewer.DroolsVertex; import edu.uci.ics.jung.graph.Graph; Added: labs/jbossrules/trunk/drools-core/src/main/java/org/drools/util/ReflectiveVisitor.java =================================================================== --- labs/jbossrules/trunk/drools-core/src/main/java/org/drools/util/ReflectiveVisitor.java 2006-04-27 21:31:33 UTC (rev 3999) +++ labs/jbossrules/trunk/drools-core/src/main/java/org/drools/util/ReflectiveVisitor.java 2006-04-27 21:33:30 UTC (rev 4000) @@ -0,0 +1,98 @@ +package org.drools.util; + +/* + * Copyright 2005 JBoss Inc + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +import java.lang.reflect.Method; + +import org.drools.Visitor; + +/** + * Java Tip 98: Reflect on the Visitor design pattern. Implement visitors in + * Java, using reflection. + * http://www.javaworld.com/javaworld/javatips/jw-javatip98.html + * + * @author Jeremy Blosser + */ +public abstract class ReflectiveVisitor + implements + Visitor { + static final String newline = System.getProperty( "line.separator" ); + + public void visit(Object object) { + try { + if ( object != null ) { + Method method = getMethod( object.getClass() ); + method.invoke( this, + new Object[]{object} ); + } else { + Method method = getClass().getMethod( "visitNull", + (Class[]) null ); + method.invoke( this, + (Object[]) null ); + } + } catch ( Exception e ) { + e.printStackTrace(); + } + } + + private Method getMethod(Class clazz) { + Class newClazz = clazz; + Method method = null; + + // Try the superclasses + while ( method == null && newClazz != Object.class ) { + String methodName = newClazz.getName(); + methodName = "visit" + methodName.substring( methodName.lastIndexOf( '.' ) + 1 ); + try { + method = getClass().getMethod( methodName, + new Class[]{newClazz} ); + } catch ( NoSuchMethodException e ) { + newClazz = newClazz.getSuperclass(); + } + } + + // Try the interfaces. + if ( newClazz == Object.class ) { + Class[] interfaces = clazz.getInterfaces(); + for ( int i = 0; i < interfaces.length; i++ ) { + String methodName = interfaces[i].getName(); + methodName = "visit" + methodName.substring( methodName.lastIndexOf( '.' ) + 1 ); + try { + method = getClass().getMethod( methodName, + new Class[]{interfaces[i]} ); + } catch ( NoSuchMethodException e ) { + // swallow + } + } + } + if ( method == null ) { + try { + method = getClass().getMethod( "visitObject", + new Class[]{Object.class} ); + } catch ( Exception e ) { + // Shouldn't happen as long as all Visitors extend this class + // and this class continues to implement visitObject(Object). + e.printStackTrace(); + } + } + return method; + } + + public void visitObject(Object object) { + System.err.println( "no visitor implementation for : " + object.getClass() + " : " + object ); + } +} |
