[jboss-svn-commits] JBL Code SVN: r9776 - labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/dialect/java.

[jboss-svn-commits at lists.jboss.org]

Author: mark.proctor at jboss.com
Date: 2007-02-26 18:57:57 -0500 (Mon, 26 Feb 2007)
New Revision: 9776

Added:
   labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/dialect/java/JavaConsequenceBuilder.java
Log:
JBRULES-708 MVEL Integration
-More interface/implementation seperation for dialects

Copied: labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/dialect/java/JavaConsequenceBuilder.java (from rev 9774, labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/semantics/java/builder/JavaConsequenceBuilder.java)
===================================================================
--- labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/dialect/java/JavaConsequenceBuilder.java	                        (rev 0)
+++ labs/jbossrules/trunk/drools-compiler/src/main/java/org/drools/dialect/java/JavaConsequenceBuilder.java	2007-02-26 23:57:57 UTC (rev 9776)
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2006 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.
+ */
+
+package org.drools.dialect.java;
+
+import java.util.Arrays;
+import java.util.List;
+
+import org.antlr.stringtemplate.StringTemplate;
+import org.drools.RuntimeDroolsException;
+import org.drools.lang.descr.RuleDescr;
+import org.drools.rule.Declaration;
+import org.drools.semantics.java.builder.BuildContext;
+import org.drools.semantics.java.builder.BuildUtils;
+import org.drools.semantics.java.builder.ConsequenceBuilder;
+
+/**
+ * @author etirelli
+ *
+ */
+public class JavaConsequenceBuilder implements ConsequenceBuilder {
+
+    /* (non-Javadoc)
+     * @see org.drools.semantics.java.builder.ConsequenceBuilder#buildConsequence(org.drools.semantics.java.builder.BuildContext, org.drools.semantics.java.builder.BuildUtils, org.drools.lang.descr.RuleDescr)
+     */
+    public void buildConsequence(final BuildContext context,
+                                 final BuildUtils utils,
+                                 final RuleDescr ruleDescr) {
+        
+        // pushing consequence LHS into the stack for variable resolution
+        context.getBuildStack().push( context.getRule().getLhs() );
+        
+        // generate 
+        // generate Invoker
+        final String className = "consequence";
+
+        StringTemplate st = utils.getRuleGroup().getInstanceOf( "consequenceMethod" );
+
+        st.setAttribute( "methodName",
+                         className );
+
+        final List[] usedIdentifiers = utils.getUsedCIdentifiers( context,
+                                                                  ruleDescr,
+                                                                  ruleDescr.getConsequence() );
+
+        final Declaration[] declarations = new Declaration[usedIdentifiers[0].size()];
+        for ( int i = 0, size = usedIdentifiers[0].size(); i < size; i++ ) {
+            declarations[i] = (Declaration) context.getDeclarationResolver().getDeclaration( (String) usedIdentifiers[0].get( i ) );
+        }
+
+        utils.setStringTemplateAttributes( context,
+                                           st,
+                                           declarations,
+                                           (String[]) usedIdentifiers[1].toArray( new String[usedIdentifiers[1].size()] ) );
+        st.setAttribute( "text",
+                         utils.getKnowledgeHelperFixer().fix( ruleDescr.getConsequence() ) );
+
+        context.getMethods().add( st.toString() );
+
+        st = utils.getInvokerGroup().getInstanceOf( "consequenceInvoker" );
+
+        st.setAttribute( "package",
+                         context.getPkg().getName() );
+        st.setAttribute( "ruleClassName",
+                         utils.ucFirst( context.getRuleDescr().getClassName() ) );
+        st.setAttribute( "invokerClassName",
+                         ruleDescr.getClassName() + utils.ucFirst( className ) + "Invoker" );
+        st.setAttribute( "methodName",
+                         className );
+
+        utils.setStringTemplateAttributes( context,
+                                           st,
+                                           declarations,
+                                           (String[]) usedIdentifiers[1].toArray( new String[usedIdentifiers[1].size()] ) );
+
+        // Must use the rule declarations, so we use the same order as used in the generated invoker
+        final List list = Arrays.asList( context.getRule().getDeclarations() );
+
+        final int[] indexes = new int[declarations.length];
+        for ( int i = 0, length = declarations.length; i < length; i++ ) {
+            indexes[i] = list.indexOf( declarations[i] );
+            if ( indexes[i] == -1 ) {
+                // some defensive code, this should never happen
+                throw new RuntimeDroolsException( "Unable to find declaration in list while generating the consequence invoker" );
+            }
+        }
+
+        st.setAttribute( "indexes",
+                         indexes );
+
+        st.setAttribute( "text",
+                         ruleDescr.getConsequence() );
+
+        final String invokerClassName = context.getPkg().getName() + "." + ruleDescr.getClassName() + utils.ucFirst( className ) + "Invoker";
+        context.getInvokers().put( invokerClassName,
+                                   st.toString() );
+        context.getInvokerLookups().put( invokerClassName,
+                                         context.getRule() );
+        context.getDescrLookups().put( invokerClassName,
+                                       ruleDescr );
+        
+        // popping Rule.getLHS() from the build stack
+        context.getBuildStack().pop();
+    }
+
+}