Examples with DeclarationMatcher org.drools.mvel.asm.GeneratorHelper.DeclarationMatcher used on opensource projects

Example 1 with DeclarationMatcher

use of org.drools.mvel.asm.GeneratorHelper.DeclarationMatcher in project drools by kiegroup.

the class ReturnValueGenerator method generate.

public static void generate(final ReturnValueStub stub, final Tuple tuple, final Declaration[] previousDeclarations, final Declaration[] localDeclarations, final ReteEvaluator reteEvaluator) {
    final String[] globals = stub.getGlobals();
    final String[] globalTypes = stub.getGlobalTypes();
    // Sort declarations based on their offset, so it can ascend the tuple's parents stack only once
    final List<DeclarationMatcher> declarationMatchers = matchDeclarationsToTuple(previousDeclarations);
    final ClassGenerator generator = createInvokerClassGenerator(stub, reteEvaluator).setInterfaces(ReturnValueExpression.class, CompiledInvoker.class);
    generator.addMethod(ACC_PUBLIC, "createContext", generator.methodDescr(Object.class), new ClassGenerator.MethodBody() {

        public void body(MethodVisitor mv) {
            mv.visitInsn(ACONST_NULL);
            mv.visitInsn(ARETURN);
        }
    }).addMethod(ACC_PUBLIC, "replaceDeclaration", generator.methodDescr(null, Declaration.class, Declaration.class)).addMethod(ACC_PUBLIC, "evaluate", generator.methodDescr(FieldValue.class, Object.class, Tuple.class, Declaration[].class, Declaration[].class, ReteEvaluator.class, Object.class), new String[] { "java/lang/Exception" }, new GeneratorHelper.EvaluateMethod() {

        public void body(MethodVisitor mv) {
            objAstorePos = 9;
            int[] previousDeclarationsParamsPos = new int[previousDeclarations.length];
            mv.visitVarInsn(ALOAD, 2);
            cast(LeftTuple.class);
            // LeftTuple
            mv.visitVarInsn(ASTORE, 7);
            Tuple currentTuple = tuple;
            for (DeclarationMatcher matcher : declarationMatchers) {
                int i = matcher.getMatcherIndex();
                previousDeclarationsParamsPos[i] = objAstorePos;
                currentTuple = traverseTuplesUntilDeclaration(currentTuple, matcher.getTupleIndex(), 7);
                mv.visitVarInsn(ALOAD, 3);
                push(i);
                // declarations[i]
                mv.visitInsn(AALOAD);
                // workingMemory
                mv.visitVarInsn(ALOAD, 5);
                mv.visitVarInsn(ALOAD, 7);
                invokeInterface(LeftTuple.class, "getFactHandle", InternalFactHandle.class);
                // tuple.getFactHandle().getObject()
                invokeInterface(InternalFactHandle.class, "getObject", Object.class);
                storeObjectFromDeclaration(previousDeclarations[i], previousDeclarations[i].getTypeName());
            }
            int[] localDeclarationsParamsPos = parseDeclarations(localDeclarations, 4, 2, 5, false);
            // @{ruleClassName}.@{methodName}(@foreach{previousDeclarations}, @foreach{localDeclarations}, @foreach{globals})
            StringBuilder returnValueMethodDescr = new StringBuilder("(");
            for (int i = 0; i < previousDeclarations.length; i++) {
                // previousDeclarations[i]
                load(previousDeclarationsParamsPos[i]);
                returnValueMethodDescr.append(typeDescr(previousDeclarations[i].getTypeName()));
            }
            for (int i = 0; i < localDeclarations.length; i++) {
                // localDeclarations[i]
                load(localDeclarationsParamsPos[i]);
                returnValueMethodDescr.append(typeDescr(localDeclarations[i].getTypeName()));
            }
            // @foreach{type : globalTypes, identifier : globals} @{type} @{identifier} = ( @{type} ) workingMemory.getGlobal( "@{identifier}" );
            parseGlobals(globals, globalTypes, 5, returnValueMethodDescr);
            returnValueMethodDescr.append(")Lorg/drools/core/spi/FieldValue;");
            mv.visitMethodInsn(INVOKESTATIC, stub.getInternalRuleClassName(), stub.getMethodName(), returnValueMethodDescr.toString());
            mv.visitInsn(ARETURN);
        }
    });
    stub.setReturnValue(generator.<ReturnValueExpression>newInstance());
}

Example 2 with DeclarationMatcher

use of org.drools.mvel.asm.GeneratorHelper.DeclarationMatcher in project drools by kiegroup.

the class ConsequenceGenerator method generate.

public static void generate(final ConsequenceStub stub, KnowledgeHelper knowledgeHelper, ReteEvaluator reteEvaluator) {
    RuleTerminalNode rtn = knowledgeHelper.getMatch().getTuple().getTupleSink();
    final Declaration[] declarations = rtn.getRequiredDeclarations();
    final Tuple tuple = knowledgeHelper.getTuple();
    // Sort declarations based on their offset, so it can ascend the tuple's parents stack only once
    final List<DeclarationMatcher> declarationMatchers = matchDeclarationsToTuple(declarations);
    final ClassGenerator generator = createInvokerClassGenerator(stub, reteEvaluator).setInterfaces(Consequence.class, CompiledInvoker.class);
    generator.addMethod(ACC_PUBLIC, "getName", generator.methodDescr(String.class), new ClassGenerator.MethodBody() {

        public void body(MethodVisitor mv) {
            push(stub.getGeneratedInvokerClassName());
            mv.visitInsn(ARETURN);
        }
    }).addMethod(ACC_PUBLIC, "evaluate", generator.methodDescr(null, KnowledgeHelper.class, ReteEvaluator.class), new String[] { "java/lang/Exception" }, new GeneratorHelper.EvaluateMethod() {

        public void body(MethodVisitor mv) {
            // Tuple tuple = knowledgeHelper.getTuple();
            mv.visitVarInsn(ALOAD, 1);
            invokeInterface(KnowledgeHelper.class, "getTuple", Tuple.class);
            cast(LeftTuple.class);
            // LeftTuple
            mv.visitVarInsn(ASTORE, 3);
            // Declaration[] declarations = ((RuleTerminalNode)knowledgeHelper.getMatch().getTuple().getTupleSink()).getDeclarations();
            mv.visitVarInsn(ALOAD, 1);
            invokeInterface(KnowledgeHelper.class, "getMatch", Activation.class);
            invokeInterface(Activation.class, "getTuple", Tuple.class);
            invokeInterface(Tuple.class, "getTupleSink", Sink.class);
            cast(RuleTerminalNode.class);
            invokeVirtual(RuleTerminalNode.class, "getRequiredDeclarations", Declaration[].class);
            mv.visitVarInsn(ASTORE, 4);
            Tuple currentTuple = tuple;
            // astore start position for objects to store in loop
            objAstorePos = 6;
            int[] paramsPos = new int[declarations.length];
            // declarationMatchers is already sorted by offset with tip declarations now first
            for (DeclarationMatcher matcher : declarationMatchers) {
                // original index refers to the array position with RuleTerminalNode.getDeclarations()
                int i = matcher.getMatcherIndex();
                int handlePos = objAstorePos;
                int objPos = ++objAstorePos;
                paramsPos[i] = handlePos;
                currentTuple = traverseTuplesUntilDeclaration(currentTuple, matcher.getTupleIndex(), 3);
                // handle = tuple.getFactHandle()
                mv.visitVarInsn(ALOAD, 3);
                invokeInterface(Tuple.class, "getOriginalFactHandle", InternalFactHandle.class);
                mv.visitVarInsn(ASTORE, handlePos);
                String declarationType = declarations[i].getTypeName();
                if (stub.getNotPatterns()[i]) {
                    // notPattern indexes field declarations
                    // declarations[i].getValue(reteEvaluator, fact[i].getObject());
                    // org.kie.rule.Declaration[]
                    mv.visitVarInsn(ALOAD, 4);
                    // i
                    push(i);
                    // declarations[i]
                    mv.visitInsn(AALOAD);
                    // WorkingMemory
                    mv.visitVarInsn(ALOAD, 2);
                    // handle[i]
                    mv.visitVarInsn(ALOAD, handlePos);
                    invokeInterface(InternalFactHandle.class, "getObject", Object.class);
                    storeObjectFromDeclaration(declarations[i], declarationType);
                    // The facthandle should be set to that of the field, if it's an object, otherwise this will return null
                    // fact[i] = (InternalFactHandle)reteEvaluator.getFactHandle(obj);
                    mv.visitVarInsn(ALOAD, 2);
                    loadAsObject(objPos);
                    invokeInterface(WorkingMemory.class, "getFactHandle", FactHandle.class, Object.class);
                    cast(InternalFactHandle.class);
                    mv.visitVarInsn(ASTORE, handlePos);
                } else {
                    // handle[i]
                    mv.visitVarInsn(ALOAD, handlePos);
                    invokeInterface(InternalFactHandle.class, "getObject", Object.class);
                    mv.visitTypeInsn(CHECKCAST, internalName(declarationType));
                    // obj[i]
                    objAstorePos += store(objPos, declarationType);
                }
            }
            // @{ruleClassName}.@{methodName}(KnowledgeHelper, @foreach{declr : declarations} Object, FactHandle @end)
            StringBuilder consequenceMethodDescr = new StringBuilder("(L" + KnowledgeHelper.class.getName().replace('.', '/') + ";");
            // KnowledgeHelper
            mv.visitVarInsn(ALOAD, 1);
            for (int i = 0; i < declarations.length; i++) {
                // obj[i]
                load(paramsPos[i] + 1);
                // handle[i]
                mv.visitVarInsn(ALOAD, paramsPos[i]);
                consequenceMethodDescr.append(typeDescr(declarations[i].getTypeName())).append("L" + FactHandle.class.getName().replace('.', '/') + ";");
            }
            // @foreach{type : globalTypes, identifier : globals} @{type} @{identifier} = ( @{type} ) workingMemory.getGlobal( "@{identifier}" );
            parseGlobals(stub.getGlobals(), stub.getGlobalTypes(), 2, consequenceMethodDescr);
            consequenceMethodDescr.append(")V");
            mv.visitMethodInsn(INVOKESTATIC, stub.getInternalRuleClassName(), stub.getMethodName(), consequenceMethodDescr.toString());
            mv.visitInsn(RETURN);
        }
    });
    stub.setConsequence(generator.<Consequence>newInstance());
}

Example 3 with DeclarationMatcher

use of org.drools.mvel.asm.GeneratorHelper.DeclarationMatcher in project drools by kiegroup.

the class PredicateGenerator method generate.

public static void generate(final PredicateStub stub, final Tuple tuple, final Declaration[] previousDeclarations, final Declaration[] localDeclarations, final ReteEvaluator reteEvaluator) {
    final String[] globals = stub.getGlobals();
    final String[] globalTypes = stub.getGlobalTypes();
    // Sort declarations based on their offset, so it can ascend the tuple's parents stack only once
    final List<DeclarationMatcher> declarationMatchers = matchDeclarationsToTuple(previousDeclarations);
    final ClassGenerator generator = createInvokerClassGenerator(stub, reteEvaluator).setInterfaces(PredicateExpression.class, CompiledInvoker.class);
    generator.addMethod(ACC_PUBLIC, "createContext", generator.methodDescr(Object.class), new ClassGenerator.MethodBody() {

        public void body(MethodVisitor mv) {
            mv.visitInsn(ACONST_NULL);
            mv.visitInsn(ARETURN);
        }
    }).addMethod(ACC_PUBLIC, "evaluate", generator.methodDescr(Boolean.TYPE, InternalFactHandle.class, Tuple.class, Declaration[].class, Declaration[].class, ReteEvaluator.class, Object.class), new String[] { "java/lang/Exception" }, new GeneratorHelper.EvaluateMethod() {

        public void body(MethodVisitor mv) {
            objAstorePos = 9;
            int[] previousDeclarationsParamsPos = new int[previousDeclarations.length];
            mv.visitVarInsn(ALOAD, 1);
            invokeInterface(InternalFactHandle.class, "getObject", Object.class);
            mv.visitVarInsn(ASTORE, 1);
            mv.visitVarInsn(ALOAD, 2);
            cast(LeftTuple.class);
            // LeftTuple
            mv.visitVarInsn(ASTORE, 7);
            Tuple currentTuple = tuple;
            for (DeclarationMatcher matcher : declarationMatchers) {
                int i = matcher.getMatcherIndex();
                previousDeclarationsParamsPos[i] = objAstorePos;
                currentTuple = traverseTuplesUntilDeclaration(currentTuple, matcher.getTupleIndex(), 7);
                mv.visitVarInsn(ALOAD, 3);
                push(i);
                // declarations[i]
                mv.visitInsn(AALOAD);
                // reteEvaluator
                mv.visitVarInsn(ALOAD, 5);
                mv.visitVarInsn(ALOAD, 7);
                invokeInterface(LeftTuple.class, "getFactHandle", InternalFactHandle.class);
                // tuple.getFactHandle().getObject()
                invokeInterface(InternalFactHandle.class, "getObject", Object.class);
                storeObjectFromDeclaration(previousDeclarations[i], previousDeclarations[i].getTypeName());
            }
            int[] localDeclarationsParamsPos = parseDeclarations(localDeclarations, 4, 2, 5, false);
            // @{ruleClassName}.@{methodName}(@foreach{previousDeclarations}, @foreach{localDeclarations}, @foreach{globals})
            StringBuilder predicateMethodDescr = new StringBuilder("(");
            for (int i = 0; i < previousDeclarations.length; i++) {
                // previousDeclarations[i]
                load(previousDeclarationsParamsPos[i]);
                predicateMethodDescr.append(typeDescr(previousDeclarations[i].getTypeName()));
            }
            for (int i = 0; i < localDeclarations.length; i++) {
                // localDeclarations[i]
                load(localDeclarationsParamsPos[i]);
                predicateMethodDescr.append(typeDescr(localDeclarations[i].getTypeName()));
            }
            // @foreach{type : globalTypes, identifier : globals} @{type} @{identifier} = ( @{type} ) workingMemory.getGlobal( "@{identifier}" );
            parseGlobals(globals, globalTypes, 5, predicateMethodDescr);
            predicateMethodDescr.append(")Z");
            mv.visitMethodInsn(INVOKESTATIC, stub.getInternalRuleClassName(), stub.getMethodName(), predicateMethodDescr.toString());
            mv.visitInsn(IRETURN);
        }
    });
    stub.setPredicate(generator.<PredicateExpression>newInstance());
}

Example 4 with DeclarationMatcher

use of org.drools.mvel.asm.GeneratorHelper.DeclarationMatcher in project drools by kiegroup.

the class EvalGenerator method generate.

public static void generate(final EvalStub stub, final Tuple tuple, final Declaration[] declarations, final ReteEvaluator reteEvaluator) {
    final String[] globals = stub.getGlobals();
    final String[] globalTypes = stub.getGlobalTypes();
    // Sort declarations based on their offset, so it can ascend the tuple's parents stack only once
    final List<DeclarationMatcher> declarationMatchers = matchDeclarationsToTuple(declarations);
    final ClassGenerator generator = createInvokerClassGenerator(stub, "_" + evalId.getAndIncrement(), reteEvaluator).setInterfaces(EvalExpression.class, CompiledInvoker.class);
    generator.addMethod(ACC_PUBLIC, "createContext", generator.methodDescr(Object.class), new ClassGenerator.MethodBody() {

        public void body(MethodVisitor mv) {
            mv.visitInsn(ACONST_NULL);
            mv.visitInsn(ARETURN);
        }
    }).addMethod(ACC_PUBLIC, "clone", generator.methodDescr(EvalExpression.class), new ClassGenerator.MethodBody() {

        public void body(MethodVisitor mv) {
            mv.visitVarInsn(ALOAD, 0);
            mv.visitInsn(ARETURN);
        }
    }).addMethod(ACC_PUBLIC, "replaceDeclaration", generator.methodDescr(null, Declaration.class, Declaration.class)).addMethod(ACC_PUBLIC, "evaluate", generator.methodDescr(Boolean.TYPE, Tuple.class, Declaration[].class, ReteEvaluator.class, Object.class), new String[] { "java/lang/Exception" }, new GeneratorHelper.EvaluateMethod() {

        public void body(MethodVisitor mv) {
            objAstorePos = 7;
            String[] expectedDeclarations = stub.getExpectedDeclarationTypes();
            int[] declarationsParamsPos = new int[declarations.length];
            mv.visitVarInsn(ALOAD, 1);
            cast(LeftTuple.class);
            // LeftTuple
            mv.visitVarInsn(ASTORE, 5);
            Tuple currentTuple = tuple;
            for (DeclarationMatcher matcher : declarationMatchers) {
                int i = matcher.getMatcherIndex();
                declarationsParamsPos[i] = objAstorePos;
                currentTuple = traverseTuplesUntilDeclaration(currentTuple, matcher.getTupleIndex(), 5);
                mv.visitVarInsn(ALOAD, 2);
                push(i);
                // declarations[i]
                mv.visitInsn(AALOAD);
                // reteEvaluator
                mv.visitVarInsn(ALOAD, 3);
                mv.visitVarInsn(ALOAD, 5);
                invokeInterface(LeftTuple.class, "getFactHandle", InternalFactHandle.class);
                // tuple.getFactHandle().getObject()
                invokeInterface(InternalFactHandle.class, "getObject", Object.class);
                storeObjectFromDeclaration(declarations[i], expectedDeclarations[i]);
            }
            // @{ruleClassName}.@{methodName}(@foreach{declarations}, @foreach{globals})
            StringBuilder evalMethodDescr = new StringBuilder("(");
            for (int i = 0; i < declarations.length; i++) {
                // declarations[i]
                load(declarationsParamsPos[i]);
                evalMethodDescr.append(typeDescr(expectedDeclarations[i]));
            }
            // @foreach{type : globalTypes, identifier : globals} @{type} @{identifier} = ( @{type} ) workingMemory.getGlobal( "@{identifier}" );
            parseGlobals(globals, globalTypes, 3, evalMethodDescr);
            evalMethodDescr.append(")Z");
            mv.visitMethodInsn(INVOKESTATIC, stub.getInternalRuleClassName(), stub.getMethodName(), evalMethodDescr.toString());
            mv.visitInsn(IRETURN);
        }
    });
    stub.setEval(generator.<EvalExpression>newInstance());
}