Examples with Label org.mvel2.asm.Label used on opensource projects

Example 81 with Label

use of org.mvel2.asm.Label in project drools by kiegroup.

the class MVELConstraintBuilder method setExprInputs.

@Override
public void setExprInputs(RuleBuildContext context, PatternBuilder.ExprBindings descrBranch, Class<?> thisClass, String expr) {
    MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData("mvel");
    ParserConfiguration conf = data.getParserConfiguration();
    conf.setClassLoader(context.getKnowledgeBuilder().getRootClassLoader());
    final ParserContext pctx = new ParserContext(conf);
    pctx.setStrictTypeEnforcement(false);
    pctx.setStrongTyping(false);
    pctx.addInput("this", thisClass);
    // overrides the mvel empty label
    pctx.addInput("empty", boolean.class);
    MVEL.COMPILER_OPT_ALLOW_NAKED_METH_CALL = true;
    MVEL.COMPILER_OPT_ALLOW_OVERRIDE_ALL_PROPHANDLING = true;
    MVEL.COMPILER_OPT_ALLOW_RESOLVE_INNERCLASSES_WITH_DOTNOTATION = true;
    MVEL.COMPILER_OPT_SUPPORT_JAVA_STYLE_CLASS_LITERALS = true;
    try {
        MVEL.analysisCompile(expr, pctx);
    } catch (Exception e) {
        // reported during expression analysis, so swallow it at the moment
        return;
    }
    if (!pctx.getInputs().isEmpty()) {
        for (String v : pctx.getInputs().keySet()) {
            // to an "empty" property, or the if will evaluate to true even if it doesn't
            if ("this".equals(v) || (PropertyTools.getFieldOrAccessor(thisClass, v) != null && expr.matches("(^|.*\\W)empty($|\\W.*)"))) {
                descrBranch.getFieldAccessors().add(v);
            } else if ("empty".equals(v)) {
            // do nothing
            } else if (!context.getPkg().getGlobals().containsKey(v)) {
                descrBranch.getRuleBindings().add(v);
            } else {
                descrBranch.getGlobalBindings().add(v);
            }
        }
    }
}

Example 82 with Label

use of org.mvel2.asm.Label in project drools by kiegroup.

the class ClassFieldAccessorFactory method buildSetMethod.

/**
 * Creates the set method for the given field definition
 */
protected static void buildSetMethod(final Class<?> originalClass, final String className, final Class<?> superClass, final Method setterMethod, final Class<?> fieldType, final ClassWriter cw) {
    MethodVisitor mv;
    // set method
    Method overridingMethod;
    try {
        overridingMethod = superClass.getMethod(getOverridingSetMethodName(fieldType), Object.class, fieldType.isPrimitive() ? fieldType : Object.class);
    } catch (final Exception e) {
        throw new RuntimeException("This is a bug. Please report back to JBoss Rules team.", e);
    }
    mv = cw.visitMethod(Opcodes.ACC_PUBLIC, overridingMethod.getName(), Type.getMethodDescriptor(overridingMethod), null, null);
    mv.visitCode();
    final Label l0 = new Label();
    mv.visitLabel(l0);
    mv.visitVarInsn(Opcodes.ALOAD, 1);
    mv.visitTypeInsn(Opcodes.CHECKCAST, Type.getInternalName(originalClass));
    mv.visitVarInsn(Type.getType(fieldType).getOpcode(Opcodes.ILOAD), 2);
    if (!fieldType.isPrimitive()) {
        mv.visitTypeInsn(Opcodes.CHECKCAST, Type.getInternalName(fieldType));
    }
    if (originalClass.isInterface()) {
        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(originalClass), setterMethod.getName(), Type.getMethodDescriptor(setterMethod), true);
    } else {
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getInternalName(originalClass), setterMethod.getName(), Type.getMethodDescriptor(setterMethod), false);
    }
    mv.visitInsn(Opcodes.RETURN);
    final Label l1 = new Label();
    mv.visitLabel(l1);
    mv.visitLocalVariable("this", "L" + className + ";", null, l0, l1, 0);
    mv.visitLocalVariable("bean", Type.getDescriptor(Object.class), null, l0, l1, 1);
    mv.visitLocalVariable("value", Type.getDescriptor(fieldType), null, l0, l1, 2);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

Example 83 with Label

use of org.mvel2.asm.Label in project drools by kiegroup.

the class ASMConsequenceStubBuilder method createStubConsequence.

private void createStubConsequence(final ClassGenerator generator, final InvokerDataProvider data, final Map<String, Object> vars) {
    generator.setInterfaces(ConsequenceStub.class, CompiledInvoker.class).addField(ACC_PRIVATE + ACC_VOLATILE, "consequence", Consequence.class);
    generator.addMethod(ACC_PUBLIC, "getName", generator.methodDescr(String.class), new ClassGenerator.MethodBody() {

        public void body(MethodVisitor mv) {
            push((String) vars.get("consequenceName"));
            // return the first object on the stack
            mv.visitInsn(ARETURN);
        }
    }).addMethod(ACC_PUBLIC, "getNotPatterns", generator.methodDescr(Boolean[].class), new ClassGenerator.MethodBody() {

        public void body(MethodVisitor mv) {
            returnAsArray((Boolean[]) vars.get("notPatterns"));
        }
    }).addMethod(ACC_PUBLIC, "evaluate", generator.methodDescr(null, KnowledgeHelper.class, ReteEvaluator.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);
            getFieldFromThis("consequence", Consequence.class);
            mv.visitJumpInsn(IFNONNULL, syncEnd);
            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)
            invokeStatic(ConsequenceGenerator.class, "generate", null, ConsequenceStub.class, KnowledgeHelper.class, ReteEvaluator.class);
            mv.visitLabel(ifNotInitialized);
            mv.visitVarInsn(ALOAD, 3);
            mv.visitInsn(MONITOREXIT);
            mv.visitLabel(l1);
            mv.visitJumpInsn(GOTO, syncEnd);
            mv.visitLabel(l2);
            mv.visitVarInsn(ASTORE, 4);
            mv.visitVarInsn(ALOAD, 3);
            mv.visitInsn(MONITOREXIT);
            mv.visitLabel(l3);
            mv.visitVarInsn(ALOAD, 4);
            mv.visitInsn(ATHROW);
            mv.visitLabel(syncEnd);
            // } end of synchronized
            getFieldFromThis("consequence", Consequence.class);
            mv.visitVarInsn(ALOAD, 1);
            mv.visitVarInsn(ALOAD, 2);
            invokeInterface(Consequence.class, "evaluate", null, KnowledgeHelper.class, ReteEvaluator.class);
            mv.visitInsn(RETURN);
        }
    }).addMethod(ACC_PUBLIC, "setConsequence", generator.methodDescr(null, Consequence.class), new ClassGenerator.MethodBody() {

        public void body(MethodVisitor mv) {
            putFieldInThisFromRegistry("consequence", Consequence.class, 1);
            mv.visitInsn(RETURN);
        }
    });
}

Example 84 with Label

use of org.mvel2.asm.Label in project drools by kiegroup.

the class DefaultBeanClassBuilder method buildEquals.

protected void buildEquals(ClassVisitor cw, ClassDefinition classDef) {
    MethodVisitor mv;
    // Building equals method
    {
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "equals", "(Ljava/lang/Object;)Z", null, null);
        mv.visitCode();
        Label l0 = null;
        if (this.debug) {
            l0 = new Label();
            mv.visitLabel(l0);
        }
        // if ( this == obj ) return true;
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        Label l1 = new Label();
        mv.visitJumpInsn(Opcodes.IF_ACMPNE, l1);
        mv.visitInsn(Opcodes.ICONST_1);
        mv.visitInsn(Opcodes.IRETURN);
        // if ( obj == null ) return false;
        mv.visitLabel(l1);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        Label l2 = new Label();
        mv.visitJumpInsn(Opcodes.IFNONNULL, l2);
        mv.visitInsn(Opcodes.ICONST_0);
        mv.visitInsn(Opcodes.IRETURN);
        // if ( getClass() != obj.getClass() ) return false;
        mv.visitLabel(l2);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getInternalName(Object.class), "getClass", Type.getMethodDescriptor(Type.getType(Class.class), new Type[] {}));
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getInternalName(Object.class), "getClass", Type.getMethodDescriptor(Type.getType(Class.class), new Type[] {}));
        Label l3 = new Label();
        mv.visitJumpInsn(Opcodes.IF_ACMPEQ, l3);
        mv.visitInsn(Opcodes.ICONST_0);
        mv.visitInsn(Opcodes.IRETURN);
        // final <classname> other = (<classname>) obj;
        mv.visitLabel(l3);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitTypeInsn(Opcodes.CHECKCAST, BuildUtils.getInternalType(classDef.getClassName()));
        mv.visitVarInsn(Opcodes.ASTORE, 2);
        // for each key field
        int count = 0;
        for (FieldDefinition field : classDef.getFieldsDefinitions()) {
            if (field.isKey()) {
                count++;
                Label goNext = new Label();
                if (BuildUtils.isPrimitive(field.getTypeName())) {
                    // if attr is primitive
                    // if ( this.<attr> != other.<booleanAttr> ) return false;
                    mv.visitVarInsn(Opcodes.ALOAD, 0);
                    visitFieldOrGetter(mv, classDef, field);
                    mv.visitVarInsn(Opcodes.ALOAD, 2);
                    visitFieldOrGetter(mv, classDef, field);
                    if (field.getTypeName().equals("long")) {
                        mv.visitInsn(Opcodes.LCMP);
                        mv.visitJumpInsn(Opcodes.IFEQ, goNext);
                    } else if (field.getTypeName().equals("double")) {
                        mv.visitInsn(Opcodes.DCMPL);
                        mv.visitJumpInsn(Opcodes.IFEQ, goNext);
                    } else if (field.getTypeName().equals("float")) {
                        mv.visitInsn(Opcodes.FCMPL);
                        mv.visitJumpInsn(Opcodes.IFEQ, goNext);
                    } else {
                        // boolean, byte, char, short, int
                        mv.visitJumpInsn(Opcodes.IF_ICMPEQ, goNext);
                    }
                    mv.visitInsn(Opcodes.ICONST_0);
                    mv.visitInsn(Opcodes.IRETURN);
                } else {
                    // if attr is not a primitive
                    // if ( this.<attr> == null && other.<attr> != null ||
                    // this.<attr> != null && ! this.<attr>.equals( other.<attr> ) ) return false;
                    mv.visitVarInsn(Opcodes.ALOAD, 0);
                    visitFieldOrGetter(mv, classDef, field);
                    Label secondIfPart = new Label();
                    mv.visitJumpInsn(Opcodes.IFNONNULL, secondIfPart);
                    // if ( other.objAttr != null ) return false;
                    mv.visitVarInsn(Opcodes.ALOAD, 2);
                    visitFieldOrGetter(mv, classDef, field);
                    Label returnFalse = new Label();
                    mv.visitJumpInsn(Opcodes.IFNONNULL, returnFalse);
                    mv.visitLabel(secondIfPart);
                    mv.visitVarInsn(Opcodes.ALOAD, 0);
                    visitFieldOrGetter(mv, classDef, field);
                    mv.visitJumpInsn(Opcodes.IFNULL, goNext);
                    mv.visitVarInsn(Opcodes.ALOAD, 0);
                    visitFieldOrGetter(mv, classDef, field);
                    mv.visitVarInsn(Opcodes.ALOAD, 2);
                    visitFieldOrGetter(mv, classDef, field);
                    if (!BuildUtils.isArray(field.getTypeName())) {
                        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Object", "equals", "(Ljava/lang/Object;)Z");
                    } else {
                        mv.visitMethodInsn(Opcodes.INVOKESTATIC, "java/util/Arrays", "equals", "(" + BuildUtils.arrayType(field.getTypeName()) + BuildUtils.arrayType(field.getTypeName()) + ")Z");
                    }
                    mv.visitJumpInsn(Opcodes.IFNE, goNext);
                    mv.visitLabel(returnFalse);
                    mv.visitInsn(Opcodes.ICONST_0);
                    mv.visitInsn(Opcodes.IRETURN);
                }
                mv.visitLabel(goNext);
            }
        }
        if (count > 0) {
            mv.visitInsn(Opcodes.ICONST_1);
        } else {
            mv.visitInsn(Opcodes.ICONST_0);
        }
        mv.visitInsn(Opcodes.IRETURN);
        Label lastLabel = null;
        if (this.debug) {
            lastLabel = new Label();
            mv.visitLabel(lastLabel);
            mv.visitLocalVariable("this", BuildUtils.getTypeDescriptor(classDef.getClassName()), null, l0, lastLabel, 0);
            mv.visitLocalVariable("obj", Type.getDescriptor(Object.class), null, l0, lastLabel, 1);
            mv.visitLocalVariable("other", BuildUtils.getTypeDescriptor(classDef.getClassName()), null, l0, lastLabel, 2);
        }
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }
}

Example 85 with Label

use of org.mvel2.asm.Label in project drools by kiegroup.

the class DefaultBeanClassBuilder method buildHashCode.

protected void buildHashCode(ClassVisitor cw, ClassDefinition classDef) {
    MethodVisitor mv;
    // Building hashCode() method
    {
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "hashCode", "()I", null, null);
        mv.visitCode();
        Label l0 = null;
        if (this.debug) {
            l0 = new Label();
            mv.visitLabel(l0);
        }
        // int result = 1;
        mv.visitInsn(Opcodes.ICONST_1);
        mv.visitVarInsn(Opcodes.ISTORE, 1);
        // for each key field
        for (FieldDefinition field : classDef.getFieldsDefinitions()) {
            if (field.isKey()) {
                // result = result * 31 + <attr_hash>
                mv.visitVarInsn(Opcodes.ILOAD, 1);
                mv.visitIntInsn(Opcodes.BIPUSH, 31);
                mv.visitVarInsn(Opcodes.ILOAD, 1);
                mv.visitInsn(Opcodes.IMUL);
                mv.visitVarInsn(Opcodes.ALOAD, 0);
                visitFieldOrGetter(mv, classDef, field);
                if ("boolean".equals(field.getTypeName())) {
                    // attr_hash ::== <boolean_attr> ? 1231 : 1237;
                    Label blabel1 = new Label();
                    mv.visitJumpInsn(Opcodes.IFEQ, blabel1);
                    mv.visitIntInsn(Opcodes.SIPUSH, 1231);
                    Label blabel2 = new Label();
                    mv.visitJumpInsn(Opcodes.GOTO, blabel2);
                    mv.visitLabel(blabel1);
                    mv.visitIntInsn(Opcodes.SIPUSH, 1237);
                    mv.visitLabel(blabel2);
                } else if ("long".equals(field.getTypeName())) {
                    // attr_hash ::== (int) (longAttr ^ (longAttr >>> 32))
                    mv.visitVarInsn(Opcodes.ALOAD, 0);
                    visitFieldOrGetter(mv, classDef, field);
                    mv.visitIntInsn(Opcodes.BIPUSH, 32);
                    mv.visitInsn(Opcodes.LUSHR);
                    mv.visitInsn(Opcodes.LXOR);
                    mv.visitInsn(Opcodes.L2I);
                } else if ("float".equals(field.getTypeName())) {
                    // attr_hash ::== Float.floatToIntBits( floatAttr );
                    mv.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getInternalName(Float.class), "floatToIntBits", "(F)I");
                } else if ("double".equals(field.getTypeName())) {
                    // attr_hash ::== (int) (Double.doubleToLongBits( doubleAttr ) ^ (Double.doubleToLongBits( doubleAttr ) >>> 32));
                    mv.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getInternalName(Double.class), "doubleToLongBits", "(D)J");
                    mv.visitInsn(Opcodes.DUP2);
                    mv.visitIntInsn(Opcodes.BIPUSH, 32);
                    mv.visitInsn(Opcodes.LUSHR);
                    mv.visitInsn(Opcodes.LXOR);
                    mv.visitInsn(Opcodes.L2I);
                } else if (!BuildUtils.isPrimitive(field.getTypeName())) {
                    // attr_hash ::== ((objAttr == null) ? 0 : objAttr.hashCode());
                    Label olabel1 = new Label();
                    mv.visitJumpInsn(Opcodes.IFNONNULL, olabel1);
                    mv.visitInsn(Opcodes.ICONST_0);
                    Label olabel2 = new Label();
                    mv.visitJumpInsn(Opcodes.GOTO, olabel2);
                    mv.visitLabel(olabel1);
                    mv.visitVarInsn(Opcodes.ALOAD, 0);
                    visitFieldOrGetter(mv, classDef, field);
                    if (!BuildUtils.isArray(field.getTypeName())) {
                        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Object", "hashCode", "()I");
                    } else {
                        mv.visitMethodInsn(INVOKESTATIC, "java/util/Arrays", "hashCode", "(" + BuildUtils.arrayType(field.getTypeName()) + ")I");
                    }
                    mv.visitLabel(olabel2);
                }
                mv.visitInsn(Opcodes.IADD);
                mv.visitVarInsn(Opcodes.ISTORE, 1);
            }
        }
        mv.visitVarInsn(Opcodes.ILOAD, 1);
        mv.visitInsn(Opcodes.IRETURN);
        Label lastLabel = null;
        if (this.debug) {
            lastLabel = new Label();
            mv.visitLabel(lastLabel);
            mv.visitLocalVariable("this", BuildUtils.getTypeDescriptor(classDef.getClassName()), null, l0, lastLabel, 0);
            mv.visitLocalVariable("hash", Type.getDescriptor(int.class), null, l0, lastLabel, 1);
        }
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }
}