Example usage for org.objectweb.asm MethodVisitor visitMaxs

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

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Introduction

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

Prototype

public void visitMaxs(final int maxStack, final int maxLocals)

Source Link

Document

Visits the maximum stack size and the maximum number of local variables of the method.

Usage

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();/*from w w  w  .  ja  va2 s .  c om*/
    visitor.visitVarInsn(ALOAD, 0);
    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();//www . j ava 2 s  . c  o m
    visitor.visitVarInsn(ALOAD, 0);
    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();//from ww w  . j a v  a2 s  . c o m
    visitor.visitVarInsn(ALOAD, 0);
    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();//from   ww  w  .  ja  va  2 s.  com
    visitor.visitVarInsn(ALOAD, 0);
    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();//  www  .  ja v  a  2  s.  c o m
    for (String attr : staticFields.keySet()) {
        mv.visitTypeInsn(NEW, staticFields.get(attr).toJVMType());
        mv.visitInsn(DUP);
        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 w w w  . ja v  a  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();/*w ww  .  jav a  2s  .co  m*/
    visitor.visitVarInsn(ALOAD, 0);
    visitor.visitMethodInsn(INVOKESPECIAL, superCls, "<init>", "()V", false);
    visitor.visitInsn(RETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

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

License:Apache License

private void makeToString(ClassWriter classWriter, Union.Value value) {
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "toString", "()Ljava/lang/String;", null, null);
    visitor.visitCode();/* w  w  w.  j a  v  a 2  s.c  om*/
    if (!value.hasMembers()) {
        visitor.visitLdcInsn(
                "union " + value.getUnion().getPackageAndClass().className() + "." + value.getName());
    } else {
        visitor.visitTypeInsn(NEW, "java/lang/StringBuilder");
        visitor.visitInsn(DUP);
        visitor.visitLdcInsn(
                "union " + value.getUnion().getPackageAndClass().className() + "." + value.getName() + "{");
        visitor.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V",
                false);
        visitor.visitVarInsn(ASTORE, 1);
        boolean first = true;
        for (String member : value.getMembers()) {
            visitor.visitVarInsn(ALOAD, 1);
            visitor.visitLdcInsn((first ? "" : ", ") + member + "=");
            visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
                    "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
            visitor.visitInsn(POP);

            visitor.visitVarInsn(ALOAD, 1);
            visitor.visitVarInsn(ALOAD, 0);
            visitor.visitFieldInsn(GETFIELD, value.getPackageAndClass().toJVMType(), member,
                    "Ljava/lang/Object;");
            visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
                    "(Ljava/lang/Object;)Ljava/lang/StringBuilder;", false);
            visitor.visitInsn(POP);
            first = false;
        }

        visitor.visitVarInsn(ALOAD, 1);
        visitor.visitLdcInsn("}");
        visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
                "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
        visitor.visitInsn(POP);
        visitor.visitVarInsn(ALOAD, 1);
        visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;",
                false);
    }
    visitor.visitInsn(ARETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

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

License:Apache License

private void makeEquals(ClassWriter cw, Union.Value value) {
    String target = value.getPackageAndClass().toJVMType();
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "equals", "(Ljava/lang/Object;)Z", null, null);
    Label notSameInstance = new Label();
    Label notNull = new Label();
    Label sameType = new Label();
    Label allAttrsEquals = new Label();
    Label attrNotEqual = new Label();
    mv.visitCode();/* www. j a v a  2  s.  co  m*/

    // if (other == this) { return true; }
    mv.visitVarInsn(ALOAD, 1);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitJumpInsn(IF_ACMPNE, notSameInstance);
    mv.visitInsn(ICONST_1);
    mv.visitInsn(IRETURN);
    mv.visitLabel(notSameInstance);

    // if (other == null) { return false; }
    mv.visitVarInsn(ALOAD, 1);
    mv.visitJumpInsn(IFNONNULL, notNull);
    mv.visitInsn(ICONST_0);
    mv.visitInsn(IRETURN);
    mv.visitLabel(notNull);

    // if (!(other instanceof <value>)) { return false; }
    mv.visitVarInsn(ALOAD, 1);
    mv.visitTypeInsn(INSTANCEOF, target);
    mv.visitJumpInsn(IFNE, sameType);
    mv.visitInsn(ICONST_0);
    mv.visitInsn(IRETURN);
    mv.visitLabel(sameType);

    // cast other to <value>
    mv.visitVarInsn(ALOAD, 1);
    mv.visitTypeInsn(CHECKCAST, target);
    mv.visitVarInsn(ASTORE, 2);

    // java.util.Objects.equals(<member>, other.<member>)
    for (String member : value.getMembers()) {
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, target, member, "Ljava/lang/Object;");
        mv.visitVarInsn(ALOAD, 2);
        mv.visitFieldInsn(GETFIELD, target, member, "Ljava/lang/Object;");
        mv.visitMethodInsn(INVOKESTATIC, "java/util/Objects", "equals",
                "(Ljava/lang/Object;Ljava/lang/Object;)Z", false);
        mv.visitJumpInsn(IFEQ, attrNotEqual);
    }
    mv.visitInsn(ICONST_1);
    mv.visitJumpInsn(GOTO, allAttrsEquals);
    mv.visitLabel(attrNotEqual);
    mv.visitInsn(ICONST_0);
    mv.visitLabel(allAttrsEquals);
    mv.visitInsn(IRETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

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

License:Apache License

private void makeHashCode(ClassWriter cw, Union.Value value) {
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "hashCode", "()I", null, null);
    mv.visitCode();//from   w w w.  j  a v a2  s  .c  o m
    loadInteger(mv, value.getMembers().size());
    mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
    int i = 0;
    for (String member : value.getMembers()) {
        mv.visitInsn(DUP);
        loadInteger(mv, i);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, value.getPackageAndClass().toJVMType(), member, "Ljava/lang/Object;");
        mv.visitInsn(AASTORE);
    }
    mv.visitMethodInsn(INVOKESTATIC, "java/util/Objects", "hash", "([Ljava/lang/Object;)I", false);
    mv.visitInsn(IRETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}