Example usage for org.objectweb.asm MethodVisitor visitJumpInsn

List of usage examples for org.objectweb.asm MethodVisitor visitJumpInsn

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Introduction

In this page you can find the example usage for org.objectweb.asm MethodVisitor visitJumpInsn.

Prototype

public void visitJumpInsn(final int opcode, final Label label)

Source Link

Document

Visits a jump instruction.

Usage

From source file:com.yahoo.yqlplus.engine.internal.plan.types.base.CollectionSizeExpression.java

@Override
public void generate(CodeEmitter code) {
    Label done = new Label();
    Label isNull = new Label();
    MethodVisitor mv = code.getMethodVisitor();
    code.exec(target);//from ww  w .j a va2  s .  co m
    boolean nullable = code.nullTest(target.getType(), isNull);
    code.getMethodVisitor().visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(Collection.class),
            "size", Type.getMethodDescriptor(Type.INT_TYPE), true);
    if (nullable) {
        mv.visitJumpInsn(Opcodes.GOTO, done);
        mv.visitLabel(isNull);
        mv.visitInsn(Opcodes.ICONST_0);
        mv.visitLabel(done);
    }
}

From source file:com.yahoo.yqlplus.engine.internal.plan.types.base.IntegerSwitchSequence.java

@Override
public void generate(CodeEmitter code) {
    Map<Integer, Label> labelMap = Maps.newHashMapWithExpectedSize(sequenceMap.size());
    for (Integer key : sequenceMap.keySet()) {
        labelMap.put(key, new Label());
    }//w  w w. j av a 2  s  . c  o  m
    Label done = new Label();
    Label defaultCase = defaultSequence == BytecodeSequence.NOOP ? done : new Label();
    code.emitIntegerSwitch(labelMap, defaultCase);
    MethodVisitor mv = code.getMethodVisitor();
    for (Map.Entry<Integer, BytecodeSequence> e : sequenceMap.entrySet()) {
        mv.visitLabel(labelMap.get(e.getKey()));
        code.exec(e.getValue());
        mv.visitJumpInsn(Opcodes.GOTO, done);
    }
    if (defaultCase != done) {
        mv.visitLabel(defaultCase);
        code.exec(defaultSequence);
    }
    mv.visitLabel(done);

}

From source file:com.yahoo.yqlplus.engine.internal.plan.types.base.IterateFirstSequence.java

@Override
public void generate(CodeEmitter start) {
    CodeEmitter code = start.createScope();
    Label done = new Label();
    Label isNull = new Label();
    MethodVisitor mv = code.getMethodVisitor();
    BytecodeExpression tgt = code.evaluateOnce(target);
    tgt.generate(code);/* ww w .ja v  a 2s .co m*/
    code.emitInstanceCheck(tgt.getType(), Iterable.class, isNull);
    AssignableValue iterator = code.allocate(Iterator.class);
    mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(Iterable.class), "iterator",
            Type.getMethodDescriptor(Type.getType(Iterator.class)), true);
    code.exec(iterator.write(code.adapt(Iterator.class)));
    code.exec(iterator.read());
    mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(Iterator.class), "hasNext",
            Type.getMethodDescriptor(Type.BOOLEAN_TYPE), true);
    mv.visitJumpInsn(Opcodes.IFEQ, isNull);
    code.exec(iterator.read());
    mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(Iterator.class), "next",
            Type.getMethodDescriptor(Type.getType(Object.class)), true);
    code.cast(valueType, AnyTypeWidget.getInstance(), isNull);
    mv.visitJumpInsn(Opcodes.GOTO, done);
    mv.visitLabel(isNull);
    mv.visitInsn(Opcodes.ACONST_NULL);
    mv.visitLabel(done);
}

From source file:com.yahoo.yqlplus.engine.internal.plan.types.base.IterateSequence.java

@Override
public void generate(CodeEmitter code) {
    Label done = new Label();
    Label next = new Label();
    MethodVisitor mv = code.getMethodVisitor();
    BytecodeExpression tgt = code.evaluateOnce(target);
    code.exec(tgt);/*from  www. j a va  2 s  .  c  o  m*/
    code.emitInstanceCheck(tgt.getType(), Iterable.class, done);
    AssignableValue item = this.item == null ? code.allocate(valueType) : this.item;
    AssignableValue iterator = code.allocate(Iterator.class);
    mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(Iterable.class), "iterator",
            Type.getMethodDescriptor(Type.getType(Iterator.class)), true);
    code.exec(iterator.write(code.adapt(Iterator.class)));
    mv.visitLabel(next);
    code.exec(iterator.read());
    mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(Iterator.class), "hasNext",
            Type.getMethodDescriptor(Type.BOOLEAN_TYPE), true);
    mv.visitJumpInsn(Opcodes.IFEQ, done);
    code.exec(iterator.read());
    mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(Iterator.class), "next",
            Type.getMethodDescriptor(Type.getType(Object.class)), true);
    code.cast(valueType, AnyTypeWidget.getInstance()); // , next);   // don't skip nulls
    code.exec(item.write(item.getType()));
    loop.item(code, item.read(), done, next);
    mv.visitJumpInsn(Opcodes.GOTO, next);
    mv.visitLabel(done);
}

From source file:com.yahoo.yqlplus.engine.internal.plan.types.base.NullTestingSerializationAdapter.java

@Override
public BytecodeSequence serializeTo(final BytecodeExpression input, final BytecodeExpression generator) {
    return new BytecodeSequence() {
        @Override/*from  ww w. j a  v a2s  .  c  om*/
        public void generate(CodeEmitter code) {
            Label isNull = new Label();
            Label done = new Label();
            BytecodeExpression source = code.evaluateOnce(input);
            code.gotoIfNull(source, isNull);
            MethodVisitor mv = code.getMethodVisitor();
            code.exec(targetAdapter.serializeTo(source, generator));
            mv.visitJumpInsn(Opcodes.GOTO, done);
            mv.visitLabel(isNull);
            switch (encoding) {
            case TBIN:
                code.exec(generator);
                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getInternalName(TBinEncoder.class), "writeNull",
                        Type.getMethodDescriptor(Type.VOID_TYPE), false);
                break;
            case JSON:
                code.exec(generator);
                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getInternalName(JsonGenerator.class),
                        "writeNull", Type.getMethodDescriptor(Type.VOID_TYPE), false);
                break;
            default:
                throw new UnsupportedOperationException("unknown NativeEncoding: " + encoding);
            }
            mv.visitLabel(done);
        }
    };
}

From source file:com.yahoo.yqlplus.engine.internal.plan.types.base.PrimitiveTypeWidget.java

@Override
public ComparisonAdapter getComparisionAdapter() {
    return new ComparisonAdapter() {
        @Override//from   w w  w  . j  av  a2s.  co m
        public void coerceBoolean(CodeEmitter scope, Label isTrue, Label isFalse, Label isNull) {
            MethodVisitor mv = scope.getMethodVisitor();
            switch (getJVMType().getSort()) {
            case Type.BOOLEAN:
            case Type.SHORT:
            case Type.INT:
            case Type.CHAR:
                mv.visitJumpInsn(Opcodes.IFEQ, isFalse);
                mv.visitJumpInsn(Opcodes.GOTO, isTrue);
                break;
            case Type.FLOAT:
                mv.visitInsn(Opcodes.FCONST_0);
                mv.visitInsn(Opcodes.FCMPG);
                mv.visitJumpInsn(Opcodes.IFEQ, isTrue);
                mv.visitJumpInsn(Opcodes.GOTO, isFalse);
                break;
            case Type.LONG:
                mv.visitInsn(Opcodes.LCONST_0);
                mv.visitInsn(Opcodes.LCMP);
                mv.visitJumpInsn(Opcodes.IFEQ, isTrue);
                mv.visitJumpInsn(Opcodes.GOTO, isFalse);
                break;
            case Type.DOUBLE:
                mv.visitInsn(Opcodes.DCONST_0);
                mv.visitInsn(Opcodes.DCMPG);
                mv.visitJumpInsn(Opcodes.IFEQ, isTrue);
                mv.visitJumpInsn(Opcodes.GOTO, isFalse);
                break;
            default:
                throw new UnsupportedOperationException("Unsupported JVM type: " + getJVMType());

            }
        }
    };
}

From source file:com.yahoo.yqlplus.engine.internal.plan.types.base.StringSwitchSequence.java

@Override
public void generate(CodeEmitter code) {
    Map<String, Label> labelMap = Maps.newHashMapWithExpectedSize(sequenceMap.size());
    for (String key : sequenceMap.keySet()) {
        labelMap.put(key, new Label());
    }/*  w  w  w.j  av  a2s .c  om*/
    Label done = new Label();
    Label defaultCase = defaultSequence == BytecodeSequence.NOOP ? done : new Label();
    code.exec(input);
    code.emitInstanceCheck(input.getType(), String.class, defaultCase);
    code.emitStringSwitch(labelMap, defaultCase, caseInsensitive);
    MethodVisitor mv = code.getMethodVisitor();
    for (Map.Entry<String, BytecodeSequence> e : sequenceMap.entrySet()) {
        mv.visitLabel(labelMap.get(e.getKey()));
        code.exec(e.getValue());
        mv.visitJumpInsn(Opcodes.GOTO, done);
    }
    if (defaultCase != done) {
        mv.visitLabel(defaultCase);
        code.exec(defaultSequence);
    }
    mv.visitLabel(done);

}

From source file:de.chimos.property.compiler.passtwo.javafx.PassTwoJFXClassVisitor.java

License:Open Source License

protected void generatePropertyMethod(PropertyInfo property) {
    MethodVisitor mv = cv.visitMethod(property.writeAccessLevel + ACC_FINAL, property.propertyMethodName,
            "()" + property.propertyInterfaceSignature,
            property.propertyInterfaceSignatureGeneric != null
                    ? "()" + property.propertyInterfaceSignatureGeneric
                    : null,// ww  w .  ja  v  a  2 s  .  co  m
            null);
    {
        AnnotationVisitor av0 = mv.visitAnnotation("L" + Property.class.getName().replace('.', '/') + ";",
                true);
        av0.visit("writeable", Boolean.TRUE);
        av0.visit("name", property.propertyName);
        av0.visit("dataSignature", property.dataSignature);
        av0.visit("dataSignatureGeneric",
                property.dataSignatureGeneric != null ? property.dataSignatureGeneric : "");
        av0.visit("humanReadableName",
                property.humanReadablePropertyName != null ? property.humanReadablePropertyName : "");
        av0.visitEnd();
    }
    mv.visitCode();
    Label l0 = new Label();
    mv.visitLabel(l0);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, property.propertyFieldName, property.propertyDataSignature);
    Label l1 = new Label();
    mv.visitJumpInsn(IFNONNULL, l1);
    Label l2 = new Label();
    mv.visitLabel(l2);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitTypeInsn(NEW, property.propertyDataType);
    mv.visitInsn(DUP);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitLdcInsn(property.propertyName);
    mv.visitMethodInsn(INVOKESPECIAL, property.propertyDataType, "<init>",
            "(Ljava/lang/Object;Ljava/lang/String;)V");
    mv.visitFieldInsn(PUTFIELD, className, property.propertyFieldName, property.propertyDataSignature);
    mv.visitLabel(l1);
    mv.visitFrame(F_SAME, 0, null, 0, null);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, property.propertyFieldName, property.propertyDataSignature);
    mv.visitTypeInsn(CHECKCAST, property.propertyInterfaceType);
    mv.visitInsn(ARETURN);
    Label l3 = new Label();
    mv.visitLabel(l3);
    mv.visitLocalVariable("this", "L" + className + ";", null, l0, l3, 0);
    mv.visitMaxs(5, 1);
    mv.visitEnd();
}

From source file:de.chimos.property.compiler.passtwo.javafx.PassTwoJFXClassVisitor.java

License:Open Source License

protected void generateReadOnlyPropertyMethod(PropertyInfo property) {
    MethodVisitor mv = cv.visitMethod(property.readAccessLevel + ACC_FINAL, property.readOnlyPropertyMethodName,
            "()" + property.readOnlyPropertyInterfaceSignature,
            property.readOnlyPropertyInterfaceSignatureGeneric != null
                    ? "()" + property.readOnlyPropertyInterfaceSignatureGeneric
                    : null,//from  w  w w  .j  a v  a  2 s  . c om
            null);
    {
        AnnotationVisitor av0 = mv.visitAnnotation("L" + Property.class.getName().replace('.', '/') + ";",
                true);
        av0.visit("writeable", Boolean.FALSE);
        av0.visit("name", property.propertyName);
        av0.visit("dataSignature", property.dataSignature);
        av0.visit("dataSignatureGeneric",
                property.dataSignatureGeneric != null ? property.dataSignatureGeneric : "");
        av0.visit("humanReadableName",
                property.humanReadablePropertyName != null ? property.humanReadablePropertyName : "");
        av0.visitEnd();
    }
    mv.visitCode();
    Label l0 = new Label();
    mv.visitLabel(l0);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, property.propertyFieldName, property.propertyDataSignature);
    Label l1 = new Label();
    mv.visitJumpInsn(IFNONNULL, l1);
    Label l2 = new Label();
    mv.visitLabel(l2);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitTypeInsn(NEW, property.propertyDataType);
    mv.visitInsn(DUP);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitLdcInsn(property.propertyName);
    mv.visitMethodInsn(INVOKESPECIAL, property.propertyDataType, "<init>",
            "(Ljava/lang/Object;Ljava/lang/String;)V");
    mv.visitFieldInsn(PUTFIELD, className, property.propertyFieldName, property.propertyDataSignature);
    mv.visitLabel(l1);
    mv.visitFrame(F_SAME, 0, null, 0, null);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, property.propertyFieldName, property.propertyDataSignature);
    mv.visitMethodInsn(INVOKEVIRTUAL, property.propertyDataType, "getReadOnlyProperty",
            "()" + property.readOnlyPropertyInterfaceSignature);
    mv.visitTypeInsn(CHECKCAST, property.readOnlyPropertyInterfaceType);
    mv.visitInsn(ARETURN);
    Label l3 = new Label();
    mv.visitLabel(l3);
    mv.visitLocalVariable("this", "L" + className + ";", null, l0, l3, 0);
    mv.visitMaxs(5, 1);
    mv.visitEnd();
}

From source file:de.kandid.model.Emitter.java

License:Apache License

/**
 * Assembles a class that implements the given interface by generating the byte code.
 * @param interfaze the interface to implement
 * @return the class//w w  w.  ja v a2 s.  com
 */
private static Class<? extends Emitter<?>> makeClass(Class<?> interfaze) {
    String nameClass = _nameEmitter + '$' + interfaze.getName().replace('.', '$');
    String nameInterface = Type.getInternalName(interfaze);
    // ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
    ClassWriter cw = new ClassWriter(0);
    cw.visit(V1_4, ACC_PUBLIC + ACC_SUPER, nameClass, null, _nameEmitter, new String[] { name(interfaze) });

    // Generate default construcotor
    MethodVisitor cv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    cv.visitVarInsn(ALOAD, 0);
    cv.visitMethodInsn(INVOKESPECIAL, _nameEmitter, "<init>", "()V");
    cv.visitInsn(RETURN);
    cv.visitMaxs(1, 1);

    // Generate methods
    Method[] methods = interfaze.getMethods();
    for (int i = 0; i < methods.length; ++i) {
        final Method m = methods[i];
        if (m.getReturnType() != void.class)
            throw new IllegalArgumentException("Method " + m.toGenericString() + " must not return a value");
        final String descMethod = Type.getMethodDescriptor(m);
        final MethodVisitor mw = cw.visitMethod(ACC_PUBLIC + ACC_SYNCHRONIZED, m.getName(), descMethod, null,
                null);
        final Type[] argTypes = Type.getArgumentTypes(m);

        // for (int i = 0; i < _end; i += 2)
        //    ((Listener) _listeners[i]).send(...);

        int localStart = 1; // give one for "this"
        for (Type at : argTypes)
            localStart += at.getSize();
        Label entry = new Label();
        Label exit = new Label();
        mw.visitLabel(entry);

        // _isFiring = true;
        mw.visitVarInsn(ALOAD, 0);
        mw.visitInsn(Opcodes.ICONST_1);
        mw.visitFieldInsn(Opcodes.PUTFIELD, nameClass, "_isFiring", Type.BOOLEAN_TYPE.getDescriptor());

        // setup local variables: i, _listeners, _end
        mw.visitLocalVariable("i", Type.INT_TYPE.getDescriptor(), null, entry, exit, localStart);
        mw.visitInsn(Opcodes.ICONST_0);
        mw.visitIntInsn(Opcodes.ISTORE, localStart);

        mw.visitLocalVariable("listeners", _descObjectArray, null, entry, exit, localStart + 1);
        mw.visitVarInsn(ALOAD, 0);
        mw.visitFieldInsn(GETFIELD, nameClass, "_listeners", _descObjectArray);
        mw.visitIntInsn(Opcodes.ASTORE, localStart + 1);

        mw.visitLocalVariable("end", Type.INT_TYPE.getDescriptor(), null, entry, exit, localStart + 2);
        mw.visitVarInsn(ALOAD, 0);
        mw.visitFieldInsn(GETFIELD, nameClass, "_end", Type.INT_TYPE.getDescriptor());
        mw.visitIntInsn(Opcodes.ISTORE, localStart + 2);

        final Label condition = new Label();
        mw.visitJumpInsn(GOTO, condition);

        final Label loop = new Label();
        mw.visitLabel(loop);

        //((Listener) _listeners[i]).doSomething()
        mw.visitIntInsn(Opcodes.ALOAD, localStart + 1);
        mw.visitIntInsn(Opcodes.ILOAD, localStart);
        mw.visitInsn(Opcodes.AALOAD);
        mw.visitTypeInsn(CHECKCAST, nameInterface);
        int offs = 1; // give one for "this"
        for (Type at : argTypes) {
            mw.visitVarInsn(at.getOpcode(ILOAD), offs);
            offs += at.getSize();
        }
        mw.visitMethodInsn(INVOKEINTERFACE, nameInterface, m.getName(), descMethod);

        // i += 2
        mw.visitIincInsn(localStart, 2);

        // if (i < end) goto loop
        mw.visitLabel(condition);
        mw.visitIntInsn(Opcodes.ILOAD, localStart);
        mw.visitIntInsn(Opcodes.ILOAD, localStart + 2);
        mw.visitJumpInsn(Opcodes.IF_ICMPLT, loop);

        // _isFiring = false;
        mw.visitVarInsn(ALOAD, 0);
        mw.visitInsn(Opcodes.ICONST_0);
        mw.visitFieldInsn(Opcodes.PUTFIELD, nameClass, "_isFiring", Type.BOOLEAN_TYPE.getDescriptor());

        mw.visitLabel(exit);
        mw.visitInsn(RETURN);
        mw.visitMaxs(localStart + 2, localStart + 3);
        mw.visitEnd();
    }
    cw.visitEnd();
    return _loader.loadClass(cw, nameClass.replace('/', '.'));
}