Example usage for org.objectweb.asm MethodVisitor visitCode

Introduction

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

Prototype

public void visitCode()

Source Link

Document

Starts the visit of the method's code, if any (i.e.

Usage

From source file:fr.insalyon.citi.golo.compiler.JavaBytecodeStructGenerator.java

License:Apache License

private void makeToString(ClassWriter classWriter, Struct struct) {
    String owner = struct.getPackageAndClass().toJVMType();
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "toString", "()Ljava/lang/String;", null, null);
    visitor.visitCode();
    visitor.visitTypeInsn(NEW, "java/lang/StringBuilder");
    visitor.visitInsn(DUP);//from  w w  w . ja v a2 s .  c om
    visitor.visitLdcInsn("struct " + struct.getPackageAndClass().className() + "{");
    visitor.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V");
    boolean first = true;
    for (String member : struct.getPublicMembers()) {
        visitor.visitInsn(DUP);
        visitor.visitLdcInsn((!first ? ", " : "") + member + "=");
        first = false;
        visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
                "(Ljava/lang/String;)Ljava/lang/StringBuilder;");
        visitor.visitInsn(DUP);
        visitor.visitVarInsn(ALOAD, 0);
        visitor.visitFieldInsn(GETFIELD, owner, member, "Ljava/lang/Object;");
        visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
                "(Ljava/lang/Object;)Ljava/lang/StringBuilder;");
    }
    visitor.visitLdcInsn("}");
    visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
            "(Ljava/lang/String;)Ljava/lang/StringBuilder;");
    visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;");
    visitor.visitInsn(ARETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

From source file:fr.insalyon.citi.golo.compiler.JavaBytecodeStructGenerator.java

License:Apache License

private void makeAllArgsConstructor(ClassWriter classWriter, Struct struct, String owner) {
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "<init>", allArgsConstructorSignature(struct),
            null, null);/*w w  w.  j a  v  a 2s.  c o m*/
    visitor.visitCode();
    visitor.visitVarInsn(ALOAD, 0);
    visitor.visitMethodInsn(INVOKESPECIAL, "gololang/GoloStruct", "<init>", "()V");
    int arg = 1;
    for (String name : struct.getMembers()) {
        visitor.visitVarInsn(ALOAD, 0);
        visitor.visitVarInsn(ALOAD, arg);
        visitor.visitFieldInsn(PUTFIELD, owner, name, "Ljava/lang/Object;");
        arg = arg + 1;
    }
    initMembersField(struct, owner, visitor);
    visitor.visitVarInsn(ALOAD, 0);
    visitor.visitInsn(ICONST_0);
    visitor.visitFieldInsn(PUTFIELD, owner, $_frozen, "Z");
    visitor.visitInsn(RETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

From source file:fr.insalyon.citi.golo.compiler.JavaBytecodeStructGenerator.java

License:Apache License

private void makeImmutableFactory(ClassWriter classWriter, Struct struct) {
    String constructorDesc = allArgsConstructorSignature(struct);
    String desc = constructorDesc.substring(0, constructorDesc.length() - 1);
    String classType = struct.getPackageAndClass().toJVMType();
    desc = desc + "L" + classType + ";";
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC | ACC_STATIC, IMMUTABLE_FACTORY_METHOD, desc,
            null, null);/* w  w  w  . j  ava 2s .  co  m*/
    visitor.visitCode();
    visitor.visitTypeInsn(NEW, classType);
    visitor.visitInsn(DUP);
    int arg = 0;
    for (String name : struct.getMembers()) {
        visitor.visitVarInsn(ALOAD, arg);
        arg = arg + 1;
    }
    visitor.visitMethodInsn(INVOKESPECIAL, classType, "<init>", constructorDesc);
    visitor.visitInsn(DUP);
    visitor.visitInsn(ICONST_1);
    visitor.visitFieldInsn(PUTFIELD, classType, $_frozen, "Z");
    visitor.visitInsn(ARETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

From source file:fr.insalyon.citi.golo.compiler.JavaBytecodeStructGenerator.java

License:Apache License

private void makeNoArgsConstructor(ClassWriter classWriter, Struct struct) {
    String owner = struct.getPackageAndClass().toJVMType();
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    visitor.visitCode();
    visitor.visitVarInsn(ALOAD, 0);//from   w  w w.j  av  a  2s. c o m
    visitor.visitMethodInsn(INVOKESPECIAL, "gololang/GoloStruct", "<init>", "()V");
    visitor.visitVarInsn(ALOAD, 0);
    visitor.visitInsn(ICONST_0);
    visitor.visitFieldInsn(PUTFIELD, struct.getPackageAndClass().toJVMType(), $_frozen, "Z");
    initMembersField(struct, owner, visitor);
    visitor.visitInsn(RETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

From source file:fr.insalyon.citi.golo.compiler.JavaBytecodeStructGenerator.java

License:Apache License

private void makeFrozenGetter(ClassWriter classWriter, String owner) {
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "isFrozen", "()Z", null, null);
    visitor.visitCode();
    visitor.visitVarInsn(ALOAD, 0);//from  w  ww . jav a  2s. co  m
    visitor.visitFieldInsn(GETFIELD, owner, $_frozen, "Z");
    visitor.visitInsn(IRETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

From source file:fr.insalyon.citi.golo.compiler.JavaBytecodeStructGenerator.java

License:Apache License

private void makeSetter(ClassWriter classWriter, String owner, String name) {
    int accessFlag = name.startsWith("_") ? ACC_PRIVATE : ACC_PUBLIC;
    MethodVisitor visitor = classWriter.visitMethod(accessFlag, name,
            "(Ljava/lang/Object;)Lgololang/GoloStruct;", null, null);
    visitor.visitCode();
    visitor.visitVarInsn(ALOAD, 0);//from   w w  w . j av  a  2  s  .c  o m
    visitor.visitFieldInsn(GETFIELD, owner, $_frozen, "Z");
    Label setLabel = new Label();
    visitor.visitJumpInsn(IFEQ, setLabel);
    visitor.visitTypeInsn(NEW, "java/lang/IllegalStateException");
    visitor.visitInsn(DUP);
    visitor.visitLdcInsn("The struct instance is frozen");
    visitor.visitMethodInsn(INVOKESPECIAL, "java/lang/IllegalStateException", "<init>",
            "(Ljava/lang/String;)V");
    visitor.visitInsn(ATHROW);
    visitor.visitLabel(setLabel);
    visitor.visitVarInsn(ALOAD, 0);
    visitor.visitVarInsn(ALOAD, 1);
    visitor.visitFieldInsn(PUTFIELD, owner, name, "Ljava/lang/Object;");
    visitor.visitVarInsn(ALOAD, 0);
    visitor.visitInsn(ARETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

From source file:fr.insalyon.citi.golo.compiler.JavaBytecodeStructGenerator.java

License:Apache License

private void makeGetter(ClassWriter classWriter, String owner, String name) {
    int accessFlag = name.startsWith("_") ? ACC_PRIVATE : ACC_PUBLIC;
    MethodVisitor visitor = classWriter.visitMethod(accessFlag, name, "()Ljava/lang/Object;", null, null);
    visitor.visitCode();
    visitor.visitVarInsn(ALOAD, 0);/*from  w w w.  j a v  a2s . c  om*/
    visitor.visitFieldInsn(GETFIELD, owner, name, "Ljava/lang/Object;");
    visitor.visitInsn(ARETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

From source file:fr.insalyon.citi.golo.compiler.JavaBytecodeUnionGenerator.java

License:Apache License

private void initStaticFields(ClassWriter cw, PackageAndClass unionType,
        Map<String, PackageAndClass> staticFields) {
    MethodVisitor mv = cw.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
    mv.visitCode();
    for (String attr : staticFields.keySet()) {
        mv.visitTypeInsn(NEW, staticFields.get(attr).toJVMType());
        mv.visitInsn(DUP);//from   w ww . ja  v a 2s  .com
        mv.visitMethodInsn(INVOKESPECIAL, staticFields.get(attr).toJVMType(), "<init>", "()V", false);
        mv.visitFieldInsn(PUTSTATIC, unionType.toJVMType(), attr, unionType.toJVMRef());
    }
    mv.visitInsn(RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:fr.insalyon.citi.golo.compiler.JavaBytecodeUnionGenerator.java

License:Apache License

private void makeStaticFactory(ClassWriter cw, Union.Value value) {
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, value.getName(),
            argsSignature(value.getMembers().size()) + value.getUnion().getPackageAndClass().toJVMRef(), null,
            null);//from  ww  w.  j  ava  2 s. c o  m
    mv.visitCode();
    mv.visitTypeInsn(NEW, value.getPackageAndClass().toJVMType());
    mv.visitInsn(DUP);
    for (int i = 0; i < value.getMembers().size(); i++) {
        mv.visitVarInsn(ALOAD, i);
    }
    mv.visitMethodInsn(INVOKESPECIAL, value.getPackageAndClass().toJVMType(), "<init>",
            argsSignature(value.getMembers().size()) + "V", false);
    mv.visitInsn(ARETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:fr.insalyon.citi.golo.compiler.JavaBytecodeUnionGenerator.java

License:Apache License

private void makeDefaultConstructor(ClassWriter classWriter, String superCls) {
    MethodVisitor visitor = classWriter.visitMethod(ACC_PROTECTED, "<init>", "()V", null, null);
    visitor.visitCode();
    visitor.visitVarInsn(ALOAD, 0);//from   w  ww  .  ja  v a  2  s.c  o  m
    visitor.visitMethodInsn(INVOKESPECIAL, superCls, "<init>", "()V", false);
    visitor.visitInsn(RETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}