Example usage for org.objectweb.asm MethodVisitor visitVarInsn

Introduction

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

Prototype

public void visitVarInsn(final int opcode, final int var)

Source Link

Document

Visits a local variable instruction.

Usage

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

License:Apache License

private void writeModuleState(LocalReference moduleState) {
    String name = moduleState.getName();
    classWriter.visitField(ACC_PRIVATE | ACC_STATIC, name, "Ljava/lang/Object;", null, null).visitEnd();

    MethodVisitor mv = classWriter.visitMethod(ACC_PRIVATE | ACC_STATIC | ACC_SYNTHETIC, name,
            "()Ljava/lang/Object;", null, null);
    mv.visitCode();//from   www . j  a va 2  s . c o  m
    mv.visitFieldInsn(GETSTATIC, jvmKlass, name, "Ljava/lang/Object;");
    mv.visitInsn(ARETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();

    mv = classWriter.visitMethod(ACC_PRIVATE | ACC_STATIC | ACC_SYNTHETIC, name, "(Ljava/lang/Object;)V", null,
            null);
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(PUTSTATIC, jvmKlass, name, "Ljava/lang/Object;");
    mv.visitInsn(RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

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

License:Apache License

private void makeSetMethod(ClassWriter classWriter, Struct struct) {
    String owner = struct.getPackageAndClass().toJVMType();
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "set",
            "(Ljava/lang/String;Ljava/lang/Object;)Lgololang/GoloStruct;", null, null);
    visitor.visitCode();/*w  ww  . ja v  a 2s  . c om*/
    insertPrivateElementCheck(struct, visitor);
    Label nextCase = new Label();
    for (String member : struct.getMembers()) {
        visitor.visitLdcInsn(member);
        visitor.visitVarInsn(ALOAD, 1);
        visitor.visitJumpInsn(IF_ACMPNE, nextCase);
        visitor.visitVarInsn(ALOAD, 0);
        visitor.visitVarInsn(ALOAD, 2);
        visitor.visitMethodInsn(INVOKEVIRTUAL, owner, member, "(Ljava/lang/Object;)Lgololang/GoloStruct;");
        visitor.visitInsn(ARETURN);
        visitor.visitLabel(nextCase);
        nextCase = new Label();
    }
    insertUnknowElementCode(struct, visitor);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

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

License:Apache License

private void makeGetMethod(ClassWriter classWriter, Struct struct) {
    String owner = struct.getPackageAndClass().toJVMType();
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "get", "(Ljava/lang/String;)Ljava/lang/Object;",
            null, null);/*ww w.j  a v  a 2s .  c  o  m*/
    visitor.visitCode();
    insertPrivateElementCheck(struct, visitor);
    Label nextCase = new Label();
    for (String member : struct.getMembers()) {
        visitor.visitLdcInsn(member);
        visitor.visitVarInsn(ALOAD, 1);
        visitor.visitJumpInsn(IF_ACMPNE, nextCase);
        visitor.visitVarInsn(ALOAD, 0);
        visitor.visitMethodInsn(INVOKEVIRTUAL, owner, member, "()Ljava/lang/Object;");
        visitor.visitInsn(ARETURN);
        visitor.visitLabel(nextCase);
        nextCase = new Label();
    }
    insertUnknowElementCode(struct, visitor);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

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

License:Apache License

private void insertPrivateElementCheck(Struct struct, MethodVisitor visitor) {
    Label afterPrivateCheck = new Label();
    visitor.visitVarInsn(ALOAD, 1);
    visitor.visitLdcInsn("_");
    visitor.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "startsWith", "(Ljava/lang/String;)Z");
    visitor.visitJumpInsn(IFEQ, afterPrivateCheck);
    visitor.visitTypeInsn(NEW, "java/lang/IllegalArgumentException");
    visitor.visitInsn(DUP);/*ww w .jav a  2 s .c  o m*/
    visitor.visitLdcInsn("Private member of " + struct.getPackageAndClass().toString());
    visitor.visitMethodInsn(INVOKESPECIAL, "java/lang/IllegalArgumentException", "<init>",
            "(Ljava/lang/String;)V");
    visitor.visitInsn(ATHROW);
    visitor.visitLabel(afterPrivateCheck);
}

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

License:Apache License

private void makeValuesMethod(ClassWriter classWriter, Struct struct) {
    String owner = struct.getPackageAndClass().toJVMType();
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "values", "()Lgololang/Tuple;", null, null);
    visitor.visitCode();/*from  www .ja  v a  2 s.  c  o m*/
    loadInteger(visitor, struct.getPublicMembers().size());
    visitor.visitTypeInsn(ANEWARRAY, "java/lang/Object");
    int index = 0;
    for (String member : struct.getPublicMembers()) {
        visitor.visitInsn(DUP);
        loadInteger(visitor, index);
        visitor.visitVarInsn(ALOAD, 0);
        visitor.visitFieldInsn(GETFIELD, owner, member, "Ljava/lang/Object;");
        visitor.visitInsn(AASTORE);
        index = index + 1;
    }
    visitor.visitMethodInsn(INVOKESTATIC, "gololang/Tuple", "fromArray",
            "([Ljava/lang/Object;)Lgololang/Tuple;");
    visitor.visitInsn(ARETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

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

License:Apache License

private void makeEquals(ClassWriter classWriter, Struct struct) {
    String owner = struct.getPackageAndClass().toJVMType();
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "equals", "(Ljava/lang/Object;)Z", null, null);
    Label notFrozenLabel = new Label();
    Label falseLabel = new Label();
    Label sameTypeLabel = new Label();
    visitor.visitCode();//  www  .j  a va 2s . c  om
    visitor.visitVarInsn(ALOAD, 0);
    visitor.visitFieldInsn(GETFIELD, owner, $_frozen, "Z");
    visitor.visitJumpInsn(IFNE, notFrozenLabel);
    // super.equals()
    visitor.visitVarInsn(ALOAD, 0);
    visitor.visitVarInsn(ALOAD, 1);
    visitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "equals", "(Ljava/lang/Object;)Z");
    visitor.visitInsn(IRETURN);
    // The receiver is frozen
    visitor.visitLabel(notFrozenLabel);
    visitor.visitVarInsn(ALOAD, 1);
    visitor.visitTypeInsn(INSTANCEOF, owner);
    visitor.visitJumpInsn(IFNE, sameTypeLabel);
    visitor.visitJumpInsn(GOTO, falseLabel);
    // The argument is of the same type, too
    visitor.visitLabel(sameTypeLabel);
    visitor.visitVarInsn(ALOAD, 1);
    visitor.visitTypeInsn(CHECKCAST, owner);
    visitor.visitFieldInsn(GETFIELD, owner, $_frozen, "Z");
    visitor.visitJumpInsn(IFEQ, falseLabel);
    // The argument is not frozen
    for (String member : struct.getMembers()) {
        visitor.visitVarInsn(ALOAD, 0);
        visitor.visitFieldInsn(GETFIELD, owner, member, "Ljava/lang/Object;");
        visitor.visitVarInsn(ALOAD, 1);
        visitor.visitTypeInsn(CHECKCAST, owner);
        visitor.visitFieldInsn(GETFIELD, owner, member, "Ljava/lang/Object;");
        visitor.visitMethodInsn(INVOKESTATIC, "java/util/Objects", "equals",
                "(Ljava/lang/Object;Ljava/lang/Object;)Z");
        visitor.visitJumpInsn(IFEQ, falseLabel);
    }
    visitor.visitInsn(ICONST_1);
    visitor.visitInsn(IRETURN);
    // False
    visitor.visitLabel(falseLabel);
    visitor.visitInsn(ICONST_0);
    visitor.visitInsn(IRETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

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

License:Apache License

private void makeHashCode(ClassWriter classWriter, Struct struct) {
    String owner = struct.getPackageAndClass().toJVMType();
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "hashCode", "()I", null, null);
    Label notFrozenLabel = new Label();
    visitor.visitCode();//from www .ja  v  a  2  s . c om
    visitor.visitVarInsn(ALOAD, 0);
    visitor.visitFieldInsn(GETFIELD, owner, $_frozen, "Z");
    visitor.visitJumpInsn(IFNE, notFrozenLabel);
    // super.hashCode()
    visitor.visitVarInsn(ALOAD, 0);
    visitor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "hashCode", "()I");
    visitor.visitInsn(IRETURN);
    // The receiver is frozen
    visitor.visitLabel(notFrozenLabel);
    loadInteger(visitor, struct.getMembers().size());
    visitor.visitTypeInsn(ANEWARRAY, "java/lang/Object");
    int i = 0;
    for (String member : struct.getMembers()) {
        visitor.visitInsn(DUP);
        loadInteger(visitor, i);
        visitor.visitVarInsn(ALOAD, 0);
        visitor.visitFieldInsn(GETFIELD, owner, member, "Ljava/lang/Object;");
        visitor.visitInsn(AASTORE);
        i = i + 1;
    }
    visitor.visitMethodInsn(INVOKESTATIC, "java/util/Objects", "hash", "([Ljava/lang/Object;)I");
    visitor.visitInsn(IRETURN);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

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

License:Apache License

private void makeCopy(ClassWriter classWriter, Struct struct, boolean frozen) {
    String owner = struct.getPackageAndClass().toJVMType();
    String methodName = frozen ? "frozenCopy" : "copy";
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, methodName, "()Lgololang/GoloStruct;", null,
            null);//w  w w  .ja  va 2  s  .  c  o  m
    visitor.visitCode();
    visitor.visitTypeInsn(NEW, owner);
    visitor.visitInsn(DUP);
    for (String member : struct.getMembers()) {
        visitor.visitVarInsn(ALOAD, 0);
        visitor.visitFieldInsn(GETFIELD, owner, member, "Ljava/lang/Object;");
    }
    visitor.visitMethodInsn(INVOKESPECIAL, owner, "<init>", allArgsConstructorSignature(struct));
    visitor.visitInsn(DUP);
    visitor.visitInsn(frozen ? ICONST_1 : ICONST_0);
    visitor.visitFieldInsn(PUTFIELD, owner, $_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 makeToString(ClassWriter classWriter, Struct struct) {
    String owner = struct.getPackageAndClass().toJVMType();
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "toString", "()Ljava/lang/String;", null, null);
    visitor.visitCode();//from  ww  w.  j av  a 2  s.  com
    visitor.visitTypeInsn(NEW, "java/lang/StringBuilder");
    visitor.visitInsn(DUP);
    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);/*from 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();
}