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:com.google.gwtorm.nosql.IndexFunctionGen.java

License:Apache License

private void implementEncode() throws OrmException {
    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "encode",
            Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { indexKeyBuilder, object }), null, null);
    mv.visitCode();//from   ww w . j a  v a2s  .c  o  m
    final EncodeCGS cgs = new EncodeCGS(mv);
    cgs.setEntityType(pojoType);

    mv.visitVarInsn(ALOAD, 2);
    mv.visitTypeInsn(CHECKCAST, pojoType.getInternalName());
    mv.visitVarInsn(ASTORE, 2);

    encodeFields(myFields, mv, cgs);

    mv.visitInsn(RETURN);
    mv.visitMaxs(-1, -1);
    mv.visitEnd();
}

---

From source file:com.google.gwtorm.protobuf.CodecGen.java

License:Apache License

private void implementSizeof() throws OrmException {
    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "sizeof",
            Type.getMethodDescriptor(Type.INT_TYPE, new Type[] { object }), null, new String[] {});
    mv.visitCode();//from w w  w . j  a v a 2 s  . c om
    final SizeofCGS cgs = new SizeofCGS(mv);
    cgs.setEntityType(pojoType);

    mv.visitVarInsn(ALOAD, 1);
    mv.visitTypeInsn(CHECKCAST, pojoType.getInternalName());
    mv.visitVarInsn(ASTORE, 1);

    cgs.push(0);
    mv.visitVarInsn(ISTORE, cgs.sizeVar);
    sizeofMessage(myFields, mv, cgs);

    mv.visitVarInsn(ILOAD, cgs.sizeVar);
    mv.visitInsn(IRETURN);
    mv.visitMaxs(-1, -1);
    mv.visitEnd();
}

---

From source file:com.google.gwtorm.protobuf.CodecGen.java

License:Apache License

private static void sizeofMessage(final JavaColumnModel[] myFields, final MethodVisitor mv, final SizeofCGS cgs)
        throws OrmException {
    for (final JavaColumnModel f : myFields) {
        if (f.isNested()) {
            final Label end = new Label();
            cgs.setFieldReference(f);//  w  w  w  .j av a  2s .  com
            cgs.pushFieldValue();
            mv.visitJumpInsn(IFNULL, end);

            final int oldVar = cgs.sizeVar;
            final int msgVar = cgs.newLocal();
            cgs.sizeVar = msgVar;
            cgs.push(0);
            mv.visitVarInsn(ISTORE, cgs.sizeVar);

            sizeofMessage(sort(f.getNestedColumns()), mv, cgs);
            cgs.sizeVar = oldVar;

            cgs.push(f.getColumnID());
            cgs.inc("computeTagSize", Type.INT_TYPE);

            mv.visitVarInsn(ILOAD, msgVar);
            cgs.inc("computeRawVarint32Size", Type.INT_TYPE);

            mv.visitVarInsn(ILOAD, msgVar);
            cgs.inc();

            cgs.freeLocal(msgVar);
            mv.visitLabel(end);
        } else {
            sizeofScalar(mv, cgs, f);
        }
    }
}

---

From source file:com.google.gwtorm.protobuf.CodecGen.java

License:Apache License

private void implementEncode() throws OrmException {
    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "encode",
            Type.getMethodDescriptor(byteString, new Type[] { object }), null, new String[] {});
    mv.visitCode();/*from   w w  w . j a  v  a 2 s .  com*/
    final EncodeCGS cgs = new EncodeCGS(mv);
    cgs.setEntityType(pojoType);

    mv.visitVarInsn(ALOAD, 1);
    mv.visitTypeInsn(CHECKCAST, pojoType.getInternalName());
    mv.visitVarInsn(ASTORE, 1);

    encodeMessage(myFields, mv, cgs);

    mv.visitInsn(ARETURN);
    mv.visitMaxs(-1, -1);
    mv.visitEnd();
}

---

From source file:com.google.gwtorm.protobuf.CodecGen.java

License:Apache License

private static void encodeMessage(final JavaColumnModel[] myFields, final MethodVisitor mv, final EncodeCGS cgs)
        throws OrmException {
    final int oldVar = cgs.codedOutputStreamVar;
    cgs.codedOutputStreamVar = cgs.newLocal();

    final int strVar = cgs.newLocal();
    mv.visitMethodInsn(INVOKESTATIC, byteString.getInternalName(), "newOutput",
            Type.getMethodDescriptor(byteStringOutput, new Type[] {}));
    mv.visitVarInsn(ASTORE, strVar);

    mv.visitVarInsn(ALOAD, strVar);/*from   www .  j a  v a 2 s  .c  o  m*/
    mv.visitMethodInsn(INVOKESTATIC, codedOutputStream.getInternalName(), "newInstance",
            Type.getMethodDescriptor(codedOutputStream, new Type[] { Type.getType(OutputStream.class) }));
    mv.visitVarInsn(ASTORE, cgs.codedOutputStreamVar);

    for (final JavaColumnModel f : myFields) {
        if (f.isNested()) {
            final Label end = new Label();
            cgs.setFieldReference(f);
            cgs.pushFieldValue();
            mv.visitJumpInsn(IFNULL, end);

            final int v = cgs.newLocal();
            encodeMessage(sort(f.getNestedColumns()), mv, cgs);
            mv.visitVarInsn(ASTORE, v);

            mv.visitVarInsn(ALOAD, v);
            mv.visitMethodInsn(INVOKEVIRTUAL, byteString.getInternalName(), "size",
                    Type.getMethodDescriptor(Type.INT_TYPE, new Type[] {}));
            mv.visitJumpInsn(IFEQ, end);

            cgs.pushCodedOutputStream();
            cgs.push(f.getColumnID());
            mv.visitVarInsn(ALOAD, v);
            cgs.write("writeBytes", byteString);

            cgs.freeLocal(v);
            mv.visitLabel(end);
        } else {
            encodeScalar(mv, cgs, f);
        }
    }

    cgs.pushCodedOutputStream();
    mv.visitMethodInsn(INVOKEVIRTUAL, codedOutputStream.getInternalName(), "flush",
            Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {}));

    cgs.freeLocal(cgs.codedOutputStreamVar);
    cgs.codedOutputStreamVar = oldVar;

    mv.visitVarInsn(ALOAD, strVar);
    mv.visitMethodInsn(INVOKEVIRTUAL, byteStringOutput.getInternalName(), "toByteString",
            Type.getMethodDescriptor(byteString, new Type[] {}));
    cgs.freeLocal(strVar);
}

---

From source file:com.google.gwtorm.protobuf.CodecGen.java

License:Apache License

private void implementDecode() throws OrmException {
    final Type retType = object;
    final MethodVisitor mv = cw.visitMethod(ACC_PROTECTED, "decode",
            Type.getMethodDescriptor(retType, new Type[] { codedInputStream }), null, new String[] {});
    mv.visitCode();/*from   w  w  w .  j  ava  2s  .co  m*/
    final DecodeCGS cgs = new DecodeCGS(mv);

    cgs.setEntityType(pojoType);

    mv.visitTypeInsn(NEW, pojoType.getInternalName());
    mv.visitInsn(DUP);
    mv.visitMethodInsn(INVOKESPECIAL, pojoType.getInternalName(), "<init>",
            Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {}));
    mv.visitVarInsn(ASTORE, cgs.objVar);

    final int tagVar = cgs.newLocal();
    decodeMessage(myFields, mv, cgs);

    cgs.pushEntity();
    mv.visitInsn(ARETURN);
    mv.visitMaxs(-1, -1);
    mv.visitEnd();
}

---

From source file:com.google.gwtorm.protobuf.CodecGen.java

License:Apache License

private static void decodeMessage(final JavaColumnModel[] myFields, final MethodVisitor mv, final DecodeCGS cgs)
        throws OrmException {
    final Label nextField = new Label();
    final Label end = new Label();
    mv.visitLabel(nextField);/*www.  j a  v a 2s.  c o  m*/

    // while (!ci.isAtEnd) { ...
    cgs.call("readTag", Type.INT_TYPE);
    mv.visitInsn(DUP);
    mv.visitVarInsn(ISTORE, cgs.tagVar);

    cgs.push(3);
    mv.visitInsn(IUSHR);

    final Label badField = new Label();
    final int[] caseTags = new int[1 + myFields.length];
    final Label[] caseLabels = new Label[caseTags.length];

    caseTags[0] = 0;
    caseLabels[0] = new Label();

    int gaps = 0;
    for (int i = 1; i < caseTags.length; i++) {
        caseTags[i] = myFields[i - 1].getColumnID();
        caseLabels[i] = new Label();
        gaps += caseTags[i] - (caseTags[i - 1] + 1);
    }

    if (2 * gaps / 3 <= myFields.length) {
        final int min = 0;
        final int max = caseTags[caseTags.length - 1];
        final Label[] table = new Label[max + 1];
        Arrays.fill(table, badField);
        for (int idx = 0; idx < caseTags.length; idx++) {
            table[caseTags[idx]] = caseLabels[idx];
        }
        mv.visitTableSwitchInsn(min, max, badField, table);
    } else {
        mv.visitLookupSwitchInsn(badField, caseTags, caseLabels);
    }

    mv.visitLabel(caseLabels[0]);
    mv.visitJumpInsn(GOTO, end);

    for (int idx = 1; idx < caseTags.length; idx++) {
        final JavaColumnModel f = myFields[idx - 1];
        mv.visitLabel(caseLabels[idx]);
        if (f.isNested()) {
            final Label load = new Label();
            cgs.setFieldReference(f);
            cgs.pushFieldValue();
            mv.visitJumpInsn(IFNONNULL, load);
            cgs.fieldSetBegin();
            mv.visitTypeInsn(NEW, Type.getType(f.getNestedClass()).getInternalName());
            mv.visitInsn(DUP);
            mv.visitMethodInsn(INVOKESPECIAL, Type.getType(f.getNestedClass()).getInternalName(), "<init>",
                    Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {}));
            cgs.fieldSetEnd();

            // read the length, set a new limit, decode the message, validate
            // we stopped at the end of it as expected.
            //
            mv.visitLabel(load);
            final int limitVar = cgs.newLocal();
            cgs.pushCodedInputStream();
            cgs.call("readRawVarint32", Type.INT_TYPE);
            cgs.ncallInt("pushLimit", Type.INT_TYPE);
            mv.visitVarInsn(ISTORE, limitVar);

            decodeMessage(sort(f.getNestedColumns()), mv, cgs);

            cgs.pushCodedInputStream();
            mv.visitVarInsn(ILOAD, limitVar);
            cgs.ncallInt("popLimit", Type.VOID_TYPE);
            cgs.freeLocal(limitVar);

        } else {
            decodeScalar(mv, cgs, f);
        }
        mv.visitJumpInsn(GOTO, nextField);
    }

    // default:
    mv.visitLabel(badField);
    cgs.pushCodedInputStream();
    mv.visitVarInsn(ILOAD, cgs.tagVar);
    cgs.ncallInt("skipField", Type.BOOLEAN_TYPE);
    mv.visitInsn(POP);
    mv.visitJumpInsn(GOTO, nextField);

    mv.visitLabel(end);
    cgs.pushCodedInputStream();
    cgs.push(0);
    cgs.ncallInt("checkLastTagWas", Type.VOID_TYPE);
}

---

From source file:com.google.gwtorm.server.SchemaConstructorGen.java

License:Apache License

private void implementConstructor() {
    final Type ft = Type.getType(schemaArg.getClass());
    final String consName = "<init>";
    final String consDesc = Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { ft });
    final MethodVisitor mv;
    mv = cw.visitMethod(ACC_PUBLIC, consName, consDesc, null, null);
    mv.visitCode();//from   ww  w  . j a  v  a2 s  . c o  m

    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKESPECIAL, Type.getInternalName(Object.class), consName,
            Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {}));

    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitFieldInsn(PUTFIELD, implTypeName, CTX, ft.getDescriptor());

    mv.visitInsn(RETURN);
    mv.visitMaxs(-1, -1);
    mv.visitEnd();
}

---

From source file:com.google.gwtorm.server.SchemaConstructorGen.java

License:Apache License

private void implementNewInstance() {
    final Type ft = Type.getType(schemaArg.getClass());
    final String typeName = Type.getType(schemaImpl).getInternalName();
    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_FINAL, "open",
            Type.getMethodDescriptor(Type.getType(Schema.class), new Type[] {}), null, null);
    mv.visitCode();/*from  ww w .  ja v  a  2 s.co  m*/

    Constructor<?> c = schemaImpl.getDeclaredConstructors()[0];
    Type argType = Type.getType(c.getParameterTypes()[0]);

    mv.visitTypeInsn(NEW, typeName);
    mv.visitInsn(DUP);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, implTypeName, CTX, ft.getDescriptor());
    mv.visitMethodInsn(INVOKESPECIAL, typeName, "<init>",
            Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { argType }));
    mv.visitInsn(ARETURN);
    mv.visitMaxs(-1, -1);
    mv.visitEnd();
}

---

From source file:com.google.gwtorm.server.SchemaGen.java

License:Apache License

private void implementConstructor() {
    final String consName = "<init>";
    final Type superType = Type.getType(schemaSuperClass);
    final Type dbType = Type.getType(databaseClass);

    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, consName,
            Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { dbType }), null, null);
    mv.visitCode();// w w w  . ja va 2  s .com

    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKESPECIAL, superType.getInternalName(), consName, Type.getMethodDescriptor(
            Type.VOID_TYPE,
            new Type[] { Type.getType(schemaSuperClass.getDeclaredConstructors()[0].getParameterTypes()[0]) }));

    for (final RelationGen info : relations) {
        mv.visitVarInsn(ALOAD, 0);
        mv.visitTypeInsn(NEW, info.accessType.getInternalName());
        mv.visitInsn(DUP);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, info.accessType.getInternalName(), consName,
                Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { superType }));
        mv.visitFieldInsn(PUTFIELD, implTypeName, info.getAccessInstanceFieldName(),
                info.accessType.getDescriptor());
    }

    mv.visitInsn(RETURN);
    mv.visitMaxs(-1, -1);
    mv.visitEnd();
}

---

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