Package org.mvel2.asm

Examples of org.mvel2.asm.Label

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            invokeVirtual(Declaration.class, "getPattern", Pattern.class);
            invokeVirtual(Pattern.class, "getOffset", Integer.TYPE); // declarations[i].getPattern().getOffset()
            mv.visitVarInsn(ISTORE, declarOffsetReg); // declarations[i].getPattern().getOffset()

            // while (tuple.getQueueIndex() > declaration[i].getPattern().getOffset()) tuple = tuple.getParent()
            Label whileStart = new Label();
            Label whileExit = new Label();
            mv.visitLabel(whileStart);
            mv.visitVarInsn(ALOAD, tupleReg);
            invokeInterface(LeftTuple.class, "getQueueIndex", Integer.TYPE); // tuple.getQueueIndex()
            mv.visitVarInsn(ILOAD, declarOffsetReg); // declarations[i].getPattern().getOffset()
            mv.visitJumpInsn(IF_ICMPLE, whileExit); // if tuple.getQueueIndex() <= declarations[i].getPattern().getOffset() jump to whileExit
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                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, WorkingMemory.class, Object.class), new String[]{"java/lang/Exception"}, new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                Label syncStart = new Label();
                Label syncEnd = new Label();
                Label l1 = new Label();
                Label l2 = new Label();
                mv.visitTryCatchBlock(syncStart, l1, l2, null);
                Label l3 = new Label();
                mv.visitTryCatchBlock(l2, l3, l2, null);
                mv.visitVarInsn(ALOAD, 0);
                mv.visitInsn(DUP);
                mv.visitVarInsn(ASTORE, 5);
                // synchronized(this) {
                mv.visitInsn(MONITORENTER);
                mv.visitLabel(syncStart);
                getFieldFromThis("eval", EvalExpression.class);
                // if (eval == null) ...
                Label ifNotInitialized = new Label();
                mv.visitJumpInsn(IFNONNULL, ifNotInitialized);
                mv.visitVarInsn(ALOAD, 0);
                mv.visitVarInsn(ALOAD, 1);
                mv.visitVarInsn(ALOAD, 2);
                mv.visitVarInsn(ALOAD, 3);
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            public void body(MethodVisitor mv) {
                returnAsArray((Boolean[]) vars.get("notPatterns"));
            }
        }).addMethod(ACC_PUBLIC, "evaluate", generator.methodDescr(null, KnowledgeHelper.class, WorkingMemory.class), new String[]{"java/lang/Exception"}, new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                Label syncStart = new Label();
                Label syncEnd = new Label();
                Label l1 = new Label();
                Label l2 = new Label();
                mv.visitTryCatchBlock(syncStart, l1, l2, null);
                Label l3 = new Label();
                mv.visitTryCatchBlock(l2, l3, l2, null);
                mv.visitVarInsn(ALOAD, 0);
                mv.visitInsn(DUP);
                mv.visitVarInsn(ASTORE, 3);
                // synchronized(this) {
                mv.visitInsn(MONITORENTER);
                mv.visitLabel(syncStart);
                getFieldFromThis("consequence", Consequence.class);
                // if (consequence == null) ...
                Label ifNotInitialized = new Label();
                mv.visitJumpInsn(IFNONNULL, ifNotInitialized);
                mv.visitVarInsn(ALOAD, 0);
                mv.visitVarInsn(ALOAD, 1);
                mv.visitVarInsn(ALOAD, 2);
                // ... ConsequenceGenerator.generate(this, knowledgeHelper, workingMemory)
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                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, WorkingMemory.class, Object.class), new String[]{"java/lang/Exception"}, new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                Label syncStart = new Label();
                Label syncEnd = new Label();
                Label l1 = new Label();
                Label l2 = new Label();
                mv.visitTryCatchBlock(syncStart, l1, l2, null);
                Label l3 = new Label();
                mv.visitTryCatchBlock(l2, l3, l2, null);
                mv.visitVarInsn(ALOAD, 0);
                mv.visitInsn(DUP);
                mv.visitVarInsn(ASTORE, 7);
                // synchronized(this) {
                mv.visitInsn(MONITORENTER);
                mv.visitLabel(syncStart);
                getFieldFromThis("returnValue", ReturnValueExpression.class);
                // if (returnValue == null) ...
                Label ifNotInitialized = new Label();
                mv.visitJumpInsn(IFNONNULL, ifNotInitialized);
                mv.visitVarInsn(ALOAD, 0);
                mv.visitVarInsn(ALOAD, 2);
                mv.visitVarInsn(ALOAD, 3);
                mv.visitVarInsn(ALOAD, 4);
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                mv.visitInsn(ACONST_NULL);
                mv.visitInsn(ARETURN);
            }
        }).addMethod(ACC_PUBLIC, "evaluate", generator.methodDescr(Boolean.TYPE, Object.class, Tuple.class, Declaration[].class, Declaration[].class, WorkingMemory.class, Object.class), new String[]{"java/lang/Exception"}, new ClassGenerator.MethodBody() {
            public void body(MethodVisitor mv) {
                Label syncStart = new Label();
                Label syncEnd = new Label();
                Label l1 = new Label();
                Label l2 = new Label();
                mv.visitTryCatchBlock(syncStart, l1, l2, null);
                Label l3 = new Label();
                mv.visitTryCatchBlock(l2, l3, l2, null);
                mv.visitVarInsn(ALOAD, 0);
                mv.visitInsn(DUP);
                mv.visitVarInsn(ASTORE, 7);
                // synchronized(this) {
                mv.visitInsn(MONITORENTER);
                mv.visitLabel(syncStart);
                getFieldFromThis("predicate", PredicateExpression.class);
                // if (predicate == null) ...
                Label ifNotInitialized = new Label();
                mv.visitJumpInsn(IFNONNULL, ifNotInitialized);
                mv.visitVarInsn(ALOAD, 0);
                mv.visitVarInsn(ALOAD, 2);
                mv.visitVarInsn(ALOAD, 3);
                mv.visitVarInsn(ALOAD, 4);
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    public static class EqualsMethod extends ClassGenerator.MethodBody {

        @Override
        public void body(MethodVisitor mv) {
            Label l1 = new Label();
            Label l2 = new Label();
            mv.visitVarInsn(ALOAD, 1); // if (object == null)
            mv.visitJumpInsn(IFNULL, l1);
            mv.visitVarInsn(ALOAD, 1);
            instanceOf(CompiledInvoker.class);
            mv.visitJumpInsn(IFNE, l2); // if (!(object instanceof  org.kie.spi.CompiledInvoker))
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            invokeVirtual(Declaration.class, "getPattern", Pattern.class);
            invokeVirtual(Pattern.class, "getOffset", Integer.TYPE); // declarations[i].getPattern().getOffset()
            mv.visitVarInsn(ISTORE, declarOffsetReg); // declarations[i].getPattern().getOffset()

            // while (tuple.getIndex() > declaration[i].getPattern().getOffset()) tuple = tuple.getParent()
            Label whileStart = new Label();
            Label whileExit = new Label();
            mv.visitLabel(whileStart);
            mv.visitVarInsn(ALOAD, tupleReg);
            invokeInterface(LeftTuple.class, "getIndex", Integer.TYPE); // tuple.getIndex()
            mv.visitVarInsn(ILOAD, declarOffsetReg); // declarations[i].getPattern().getOffset()
            mv.visitJumpInsn(IF_ICMPLE, whileExit); // if tuple.getIndex() <= declarations[i].getPattern().getOffset() jump to whileExit
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            }
        }

        private void jitCombinedCondition(CombinedCondition combinedCondition) {
            boolean isAnd = combinedCondition.isAnd();
            Label shortcut = new Label();
            Label noShortcut = new Label();

            for (Condition condition : combinedCondition.getConditions()) {
                jitCondition(condition);
                mv.visitJumpInsn(isAnd ? IFEQ : IFNE, shortcut);
            }
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            });

            jitExpression(singleCondition.getLeft(), String.class);
            store(LEFT_OPERAND, singleCondition.getLeft().getType());

            Label notNullLabel = jitLeftIsNull(singleCondition.getLeft().getType() == String.class ?
                    jitNullSafeOperationStart() :
                    jitNullSafeCoercion(singleCondition.getLeft().getType(), String.class));

            mv.visitInsn(ICONST_0);

            Label nullEvaluation = new Label();
            mv.visitJumpInsn(GOTO, nullEvaluation);
            mv.visitLabel(notNullLabel);

            getStaticField(patternVariableName, Pattern.class);
            load(LEFT_OPERAND);
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            if (isFixed(right) && right.canBeNull()) {
                // a primitive cannot be null
                mv.visitInsn(singleCondition.getOperation() == BooleanOperator.NE ? ICONST_1 : ICONST_0);
                return;
            }
            Label nullArg = new Label();
            ensureNotNullArgs(left, right, nullArg);

            jitExpression(left, type);
            castExpressionResultToPrimitive(left, type);
            jitExpression(right, type);
            castExpressionResultToPrimitive(right, type);
            jitPrimitiveOperation(singleCondition.getOperation(), type);
            Label nonNullArg = new Label();
            mv.visitJumpInsn(GOTO, nonNullArg);

            mv.visitLabel(nullArg);
            mv.visitInsn(ICONST_0);
            mv.visitLabel(nonNullArg);
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Related Classes of org.mvel2.asm.Label

  • loop.AsmMvelPerformanceBenchmark
  • org.drools.base.ClassFieldAccessorFactory
  • org.drools.base.extractors.MVELObjectClassFieldReader
  • org.drools.base.ModifyInterceptor
  • org.drools.base.mvel.DroolsMVELFactory
  • org.drools.base.mvel.DroolsProcessMVELFactory
  • org.drools.base.mvel.MVELAccumulator
  • org.drools.base.mvel.MVELAction
  • org.drools.base.mvel.MVELCompilationUnit
  • org.drools.base.mvel.MVELConsequence
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