Example usage for org.objectweb.asm MethodVisitor visitMethodInsn

Introduction

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

Prototype

public void visitMethodInsn(final int opcode, final String owner, final String name, final String descriptor,
        final boolean isInterface) 

Source Link

Document

Visits a method instruction.

Usage

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

/**
 * Generate value decoding using the blink input.
 *
 * <p>Defaults to <code>readUInt16[Null].</code>
 *
 * @param required true if the field is required, otherwise false.
 * @param mv the method visitor, not null.
 * @see #generateDecodeValue//  w w w  .  jav  a  2s. com
 */
protected void generateDecodeCharacterValue(boolean required, MethodVisitor mv) {
    if (required) {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readUInt16",
                "(Lcom/cinnober/msgcodec/io/ByteSource;)S", false);
        mv.visitInsn(I2C);
    } else {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readUInt16Null",
                "(Lcom/cinnober/msgcodec/io/ByteSource;)Ljava/lang/Short;", false);
        Label nullLabel = new Label();
        mv.visitInsn(DUP);
        mv.visitJumpInsn(IFNULL, nullLabel);
        unbox(mv, Short.class);
        mv.visitInsn(I2C);
        box(mv, Character.class);
        mv.visitLabel(nullLabel);
        mv.visitTypeInsn(CHECKCAST, Type.getInternalName(Character.class));
    }
}

---

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

/**
 * Generate value decoding using the blink input.
 *
 * <p>Defaults to <code>readUInt16[Null].</code>
 *
 * @param required true if the field is required, otherwise false.
 * @param mv the method visitor, not null.
 * @see #generateDecodeValue//from  ww  w  .j a  v a 2s  .  co m
 */
protected void generateDecodeUInt16Value(boolean required, MethodVisitor mv) {
    if (required) {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readUInt16",
                "(Lcom/cinnober/msgcodec/io/ByteSource;)S", false);
    } else {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readUInt16Null",
                "(Lcom/cinnober/msgcodec/io/ByteSource;)Ljava/lang/Short;", false);
    }
}

---

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

/**
 * Generate value decoding using the blink input.
 *
 * <p>Defaults to <code>readInt16[Null].</code>
 *
 * @param required true if the field is required, otherwise false.
 * @param mv the method visitor, not null.
 * @see #generateDecodeValue/* w  w w.j  a v  a 2 s  .  c o  m*/
 */
protected void generateDecodeInt16Value(boolean required, MethodVisitor mv) {
    if (required) {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readInt16",
                "(Lcom/cinnober/msgcodec/io/ByteSource;)S", false);
    } else {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readInt16Null",
                "(Lcom/cinnober/msgcodec/io/ByteSource;)Ljava/lang/Short;", false);
    }
}

---

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

/**
 * Generate value decoding using the blink input.
 *
 * <p>Defaults to <code>readUInt8[Null].</code>
 *
 * @param required true if the field is required, otherwise false.
 * @param mv the method visitor, not null.
 * @see #generateDecodeValue/*from   ww  w . ja  v a2  s .  co  m*/
 */
protected void generateDecodeUInt8Value(boolean required, MethodVisitor mv) {
    if (required) {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readUInt8",
                "(Lcom/cinnober/msgcodec/io/ByteSource;)B", false);
    } else {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readUInt8Null",
                "(Lcom/cinnober/msgcodec/io/ByteSource;)Ljava/lang/Byte;", false);
    }
}

---

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

/**
 * Generate value decoding using the blink input.
 *
 * <p>Defaults to <code>readInt8[Null].</code>
 *
 * @param required true if the field is required, otherwise false.
 * @param mv the method visitor, not null.
 * @see #generateDecodeValue/*from w  ww .ja v  a2 s . c o  m*/
 */
protected void generateDecodeInt8Value(boolean required, MethodVisitor mv) {
    if (required) {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readInt8",
                "(Lcom/cinnober/msgcodec/io/ByteSource;)B", false);
    } else {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readInt8Null",
                "(Lcom/cinnober/msgcodec/io/ByteSource;)Ljava/lang/Byte;", false);
    }
}

---

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

protected void generateDecodeTimeValue(TypeDef.Time type, Class<?> javaClass, boolean required,
        MethodVisitor mv, LocalVariable nextVar) throws IllegalArgumentException {
    if (javaClass == long.class || javaClass == Long.class) {
        generateDecodeInt64Value(required, mv);
    } else if (javaClass == int.class || javaClass == Integer.class) {
        generateDecodeInt32Value(required, mv);
    } else if (javaClass == Date.class) {

        int timeVar = nextVar.next();
        nextVar.next(); // note: 2 variable slots
        Label endLabel = new Label();
        if (required) {
            generateDecodeInt64Value(true, mv);
        } else {/*from w  ww . ja va  2s  . co m*/
            generateDecodeInt64Value(false, mv);
            mv.visitInsn(DUP);
            Label nonNullLabel = new Label();
            mv.visitJumpInsn(IFNONNULL, nonNullLabel);
            // null
            mv.visitTypeInsn(CHECKCAST, "java/util/Date");
            mv.visitJumpInsn(GOTO, endLabel);
            // not null
            mv.visitLabel(nonNullLabel);
            mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Long", "longValue", "()J", false);
        }

        mv.visitVarInsn(LSTORE, timeVar);
        mv.visitTypeInsn(NEW, "java/util/Date");
        mv.visitInsn(DUP);
        mv.visitVarInsn(LLOAD, timeVar);
        // handle differences in UNIT and EPOCH
        long epochOffset = DateUtil.getEpochOffset(type.getEpoch());
        long timeInMillis = DateUtil.getTimeInMillis(type.getUnit());
        // dateTime = wireTime * timeUnitInMillis + epochOffset;
        if (timeInMillis != 1) {
            mv.visitLdcInsn(timeInMillis);
            mv.visitInsn(LMUL);
        }
        if (epochOffset != 0) {
            mv.visitLdcInsn(epochOffset);
            mv.visitInsn(LADD);
        }

        mv.visitMethodInsn(INVOKESPECIAL, "java/util/Date", "<init>", "(J)V", false);

        if (!required) {
            // end
            mv.visitLabel(endLabel);
        }
    } else {
        throw new IllegalArgumentException("Illegal time javaClass: " + javaClass);
    }
}

---

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

/**
 * @see #generateDecodeInt32Value(boolean, org.objectweb.asm.MethodVisitor) 
 *//*www.j  a va  2 s.c  o m*/
protected void generateDecodeEnumValue(boolean required, MethodVisitor mv, TypeDef type,
        String genClassInternalName, String fieldIdentifier, LocalVariable nextVar, Class<?> javaClass,
        String debugValueLabel) throws IllegalArgumentException {

    Label endLabel = new Label();
    if (required) {
        generateDecodeInt32Value(true, mv);
        box(mv, Integer.class);
    } else {
        generateDecodeInt32Value(false, mv);
        mv.visitInsn(DUP);
        mv.visitJumpInsn(IFNULL, endLabel);

        //            Label nonNullLabel = new Label();
        //            mv.visitJumpInsn(IFNONNULL, nonNullLabel);
        //            mv.visitTypeInsn(CHECKCAST, Type.getInternalName(javaClass));
        //            mv.visitJumpInsn(GOTO, endLabel);

        // not null
        //            mv.visitLabel(nonNullLabel);
        //            mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Integer", "intValue", "()I", false); // unbox(mv, Integer.class);
    }

    // SymbolMapping
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, genClassInternalName, "symbolMapping_" + fieldIdentifier,
            "Lcom/cinnober/msgcodec/SymbolMapping;");
    mv.visitInsn(SWAP);
    mv.visitMethodInsn(INVOKEINTERFACE, "com/cinnober/msgcodec/SymbolMapping", "lookup",
            "(Ljava/lang/Integer;)Ljava/lang/Object;", true);

    //        // switch
    //        TypeDef.Enum enumType = (TypeDef.Enum) type;
    //        List<Symbol> symbols = enumType.getSymbols();
    //        int numSymbols = symbols.size();
    //        int[] ids = new int[numSymbols];
    //        Label[] labels = new Label[numSymbols];
    //        for (int i=0; i<numSymbols; i++) {
    //            ids[i] = symbols.get(i).getId();
    //            labels[i] = new Label();
    //        }
    //        Label defaultLabel = new Label();
    //        int symbolIdVar = nextVar.next();
    //        mv.visitInsn(DUP);
    //        mv.visitVarInsn(ISTORE, symbolIdVar);
    //        EnumSymbols enumSymbols = null;
    //        if (javaClass.isEnum()) {
    //            enumSymbols = new EnumSymbols(enumType, javaClass);
    //        }
    //        mv.visitLookupSwitchInsn(defaultLabel, ids, labels);
    //        for (int i=0; i<numSymbols; i++) {
    //            boolean addGotoEnd = true;
    //            mv.visitLabel(labels[i]);
    //            if (javaClass.isEnum()) {
    //                Enum enumValue = enumSymbols.getEnum(ids[i]);
    //                if (enumValue != null) {
    //                    //mv.visitLdcInsn(Type.getType(javaClass));
    //                    mv.visitFieldInsn(GETSTATIC, Type.getInternalName(javaClass),
    //                            enumValue.name(),
    //                            Type.getDescriptor(javaClass));
    //                } else {
    //                    mv.visitLdcInsn(debugValueLabel);
    //                    mv.visitLdcInsn(ids[i]);
    //                    mv.visitLdcInsn(Type.getType(javaClass));
    //                    mv.visitMethodInsn(INVOKESTATIC, baseclassIName, "unmappableEnumSymbolId",
    //                            "(Ljava/lang/String;ILjava/lang/Class;)Lcom/cinnober/msgcodec/DecodeException;", false);
    //                    mv.visitInsn(ATHROW);
    //                    addGotoEnd = false;
    //                }
    //            } else if (javaClass == int.class || javaClass == Integer.class) {
    //                mv.visitLdcInsn(ids[i]);
    //                if (!required) {
    //                    box(mv, Integer.class);
    //                }
    //            } else {
    //                throw new IllegalArgumentException("Illegal enum javaClass: " + javaClass);
    //            }
    //            if (addGotoEnd) {
    //                mv.visitJumpInsn(GOTO, endLabel);
    //            }
    //        }
    //        mv.visitLabel(defaultLabel);
    //        mv.visitLdcInsn(debugValueLabel);
    //        mv.visitVarInsn(ILOAD, symbolIdVar);
    //        mv.visitMethodInsn(INVOKESTATIC, baseclassIName, "unknownEnumSymbol",
    //                "(Ljava/lang/String;I)Lcom/cinnober/msgcodec/DecodeException;", false);
    //        mv.visitInsn(ATHROW);

    // end
    mv.visitLabel(endLabel);

    if (!javaClass.isEnum()) {
        mv.visitTypeInsn(CHECKCAST, Type.getInternalName(Integer.class));
        if (required) {
            unbox(mv, Integer.class);
        }
    } else {
        mv.visitTypeInsn(CHECKCAST, Type.getInternalName(javaClass));
    }
}

---

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

protected void generateDecodeDynRefValue(MethodVisitor mv, boolean required, GroupDef refGroup,
        Class<?> javaClass) {
    mv.visitVarInsn(ALOAD, 0); // this
    mv.visitInsn(SWAP); // this and in
    if (required) {
        mv.visitMethodInsn(INVOKEVIRTUAL, baseclassIName, "readDynamicGroup",
                "(Lcom/cinnober/msgcodec/io/ByteSource;)Ljava/lang/Object;", false);
    } else {/*from  w ww  .  j  a  va 2 s.c  om*/
        mv.visitMethodInsn(INVOKEVIRTUAL, baseclassIName, "readDynamicGroupNull",
                "(Lcom/cinnober/msgcodec/io/ByteSource;)Ljava/lang/Object;", false);
    }
    if (refGroup != null) {
        mv.visitTypeInsn(CHECKCAST, Type.getInternalName(javaClass));
    }
}

---

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

protected void generateDecodeRefValue(GroupDef refGroup, boolean required, MethodVisitor mv, int byteSourceVar,
        String genClassInternalName, Class<?> javaClass, TypeDef type, boolean javaClassCodec)
        throws IllegalArgumentException {
    if (refGroup != null) {
        String groupDescriptor = getTypeDescriptor(javaClass, javaClassCodec);
        if (required) {
            mv.visitInsn(POP); // input stream
            mv.visitVarInsn(ALOAD, 0);/*from   www .  j a v a 2s .  co  m*/
            mv.visitVarInsn(ALOAD, byteSourceVar);
            mv.visitMethodInsn(INVOKEVIRTUAL, genClassInternalName, "readStaticGroup_" + refGroup.getName(),
                    "(Lcom/cinnober/msgcodec/io/ByteSource;)" + groupDescriptor, false);
        } else {
            mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readPresenceByte",
                    "(Lcom/cinnober/msgcodec/io/ByteSource;)Z", false);
            Label nonNullLabel = new Label();
            Label endLabel = new Label();
            mv.visitJumpInsn(IFNE, nonNullLabel); // not false, i.e. true
            // null
            mv.visitInsn(ACONST_NULL);
            mv.visitJumpInsn(GOTO, endLabel);

            // not null
            mv.visitLabel(nonNullLabel);
            mv.visitFrame(F_SAME, 0, null, 0, null);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitVarInsn(ALOAD, byteSourceVar);
            mv.visitMethodInsn(INVOKEVIRTUAL, genClassInternalName, "readStaticGroup_" + refGroup.getName(),
                    "(Lcom/cinnober/msgcodec/io/ByteSource;)" + groupDescriptor, false);

            mv.visitLabel(endLabel);
            // PENDING: mv.visitFrame?
            mv.visitFrame(F_SAME, 0, null, 0, null);
        }
    } else {
        throw new IllegalArgumentException("Illegal reference: " + type);
    }
}

---

From source file:com.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

protected void generateDecodeSequenceValue(Class<?> javaClass, LocalVariable nextVar, boolean required,
        MethodVisitor mv, Class<?> componentJavaClass, int byteSourceVar, TypeDef type, Schema schema,
        String genClassInternalName, String fieldIdentifier, String debugValueLabel, boolean javaClassCodec)
        throws IllegalArgumentException {
    if (!javaClass.isArray() && javaClass != List.class) {
        throw new IllegalArgumentException("Illegal sequence javaClass: " + javaClass);
    }//from   w ww.ja va 2s . co  m

    int lengthVar = nextVar.next();
    int sequenceVar = nextVar.next();
    Label finalEndLabel = new Label();
    if (required) {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readUInt32",
                "(Lcom/cinnober/msgcodec/io/ByteSource;)I", false);
        mv.visitVarInsn(ISTORE, lengthVar);
    } else {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readUInt32Null",
                "(Lcom/cinnober/msgcodec/io/ByteSource;)Ljava/lang/Integer;", false);
        mv.visitInsn(DUP);
        mv.visitJumpInsn(IFNULL, finalEndLabel);
        unbox(mv, Integer.class);
        mv.visitVarInsn(ISTORE, lengthVar);
    }

    if (javaClass.isArray()) {
        mv.visitVarInsn(ILOAD, lengthVar);
        generateNewArray(mv, componentJavaClass);
    } else {
        mv.visitTypeInsn(NEW, "java/util/ArrayList");
        mv.visitInsn(DUP);
        mv.visitVarInsn(ILOAD, lengthVar);
        mv.visitMethodInsn(INVOKESPECIAL, "java/util/ArrayList", "<init>", "(I)V", false);
    }
    mv.visitVarInsn(ASTORE, sequenceVar);

    // for loop
    Label endLabel = new Label();
    int loopVar = nextVar.next();
    mv.visitInsn(ICONST_0);
    mv.visitVarInsn(ISTORE, loopVar);
    Label loopLabel = new Label();
    mv.visitLabel(loopLabel);
    // PENDING: mv.visitFrame?
    mv.visitFrame(F_SAME, 0, null, 0, null);
    mv.visitVarInsn(ILOAD, loopVar);
    mv.visitVarInsn(ILOAD, lengthVar);
    mv.visitJumpInsn(IF_ICMPGE, endLabel);

    mv.visitVarInsn(ALOAD, sequenceVar);
    mv.visitVarInsn(ILOAD, loopVar);
    mv.visitVarInsn(ALOAD, byteSourceVar);

    // decode the element
    TypeDef.Sequence seqType = (TypeDef.Sequence) type;
    generateDecodeValue(mv, byteSourceVar, nextVar, true, seqType.getComponentType(), componentJavaClass, null,
            schema, genClassInternalName, fieldIdentifier, debugValueLabel + ".component", javaClassCodec);

    // store the value
    if (javaClass.isArray()) {
        generateArrayStore(mv, componentJavaClass);
    } else {
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/util/ArrayList", "add", "(ILjava/lang/Object;)V", false);
    }

    mv.visitIincInsn(loopVar, 1);
    mv.visitJumpInsn(GOTO, loopLabel);
    mv.visitLabel(endLabel);
    mv.visitFrame(F_SAME, 0, null, 0, null);
    mv.visitVarInsn(ALOAD, sequenceVar);
    mv.visitLabel(finalEndLabel);
    mv.visitFrame(F_SAME, 0, null, 0, null);
    if (javaClass.isArray()) {
        mv.visitTypeInsn(CHECKCAST, Type.getInternalName(javaClass));
    }
}

---

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