Example usage for org.objectweb.asm MethodVisitor visitVarInsn

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

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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.cinnober.msgcodec.blink.BaseByteCodeGenerator.java

License:Open Source License

protected void generateReadStaticGroup(Schema schema, ClassVisitor cv, String genClassInternalName,
        boolean javaClassCodec) {
    MethodVisitor mv = cv.visitMethod(ACC_PROTECTED, "readStaticGroup",
            "(ILcom/cinnober/msgcodec/io/ByteSource;)Ljava/lang/Object;", null,
            new String[] { "java/io/IOException" });
    int nextVar = 3;
    mv.visitCode();/*from   w  ww .  ja va2s  . c  o  m*/

    Map<Integer, Label> labelsByGroupId = new TreeMap<>();
    for (GroupDef group : schema.getGroups()) {
        if (group.getId() != -1) {
            labelsByGroupId.put(group.getId(), new Label());
        }
    }
    mv.visitVarInsn(ILOAD, 1); // group id
    Label unknownGroupIdLabel = new Label();
    {
        int[] caseValues = new int[labelsByGroupId.size()];
        int i = 0;
        for (int groupId : labelsByGroupId.keySet()) {
            caseValues[i++] = groupId;
        }
        Label[] caseLabels = labelsByGroupId.values().toArray(new Label[labelsByGroupId.size()]);
        mv.visitLookupSwitchInsn(unknownGroupIdLabel, caseValues, caseLabels);
    }

    for (Map.Entry<Integer, Label> caseEntry : labelsByGroupId.entrySet()) {
        GroupDef group = schema.getGroup(caseEntry.getKey().intValue());
        Object groupType = group.getGroupType();
        String groupDescriptor = getTypeDescriptor(groupType, javaClassCodec);

        mv.visitLabel(caseEntry.getValue());
        mv.visitFrame(F_SAME, 0, null, 0, null);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ALOAD, 2);
        mv.visitMethodInsn(INVOKEVIRTUAL, genClassInternalName, "readStaticGroup_" + group.getName(),
                "(Lcom/cinnober/msgcodec/io/ByteSource;)" + groupDescriptor, false);
        mv.visitInsn(ARETURN);
    }
    // default case
    mv.visitLabel(unknownGroupIdLabel);
    mv.visitFrame(F_SAME, 0, null, 0, null);
    mv.visitVarInsn(ILOAD, 1);
    mv.visitMethodInsn(INVOKESTATIC, baseclassIName, "unknownGroupId",
            "(I)Lcom/cinnober/msgcodec/DecodeException;", false);
    mv.visitInsn(ATHROW);
    mv.visitMaxs(2, nextVar);
    mv.visitEnd();
}

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

License:Open Source License

protected void generateReadStaticGroupForTypeAndCreate(Schema schema, ClassVisitor cv,
        String genClassInternalName, boolean javaClassCodec) {
    for (GroupDef group : schema.getGroups()) {
        Object groupType = group.getGroupType();
        String groupDescriptor = getTypeDescriptor(groupType, javaClassCodec);
        String groupInternalName = getTypeInternalName(groupType, javaClassCodec);
        MethodVisitor readmv = cv.visitMethod(ACC_PRIVATE, "readStaticGroup_" + group.getName(),
                "(Lcom/cinnober/msgcodec/io/ByteSource;)" + groupDescriptor, null,
                new String[] { "java/io/IOException" });
        readmv.visitCode();//www  . j a  v  a  2s. c  o m
        int nextReadVar = 2;

        Factory<?> factory = group.getFactory();
        if (isPublicConstructorFactory(factory)) {
            // read, create instance
            readmv.visitTypeInsn(NEW, groupInternalName);
            readmv.visitInsn(DUP);
            readmv.visitMethodInsn(INVOKESPECIAL, groupInternalName, "<init>", "()V", false);
        } else {
            // read, create instance
            readmv.visitVarInsn(ALOAD, 0); // this
            readmv.visitFieldInsn(GETFIELD, genClassInternalName, "factory_" + group.getName(),
                    "Lcom/cinnober/msgcodec/Factory;");
            readmv.visitMethodInsn(INVOKEINTERFACE, "com/cinnober/msgcodec/Factory", "newInstance",
                    "()Ljava/lang/Object;", true);
            if (javaClassCodec) {
                readmv.visitTypeInsn(CHECKCAST, groupInternalName);
            }
        }
        final int readInstanceVar = nextReadVar++;
        readmv.visitVarInsn(ASTORE, readInstanceVar);

        readmv.visitVarInsn(ALOAD, 0);
        readmv.visitVarInsn(ALOAD, 1);
        readmv.visitVarInsn(ALOAD, readInstanceVar);
        readmv.visitMethodInsn(INVOKEVIRTUAL, genClassInternalName, "readStaticGroup_" + group.getName(),
                "(Lcom/cinnober/msgcodec/io/ByteSource;" + groupDescriptor + ")V", false);

        // end read
        readmv.visitVarInsn(ALOAD, readInstanceVar);
        readmv.visitInsn(ARETURN);
        readmv.visitMaxs(4, nextReadVar);
        readmv.visitEnd();
    }
}

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

License:Open Source License

protected void generateReadStaticGroupForType(final Schema schema, ClassVisitor cv,
        final String genClassInternalName, final boolean javaClassCodec) {
    for (final GroupDef group : schema.getGroups()) {
        Object groupType = group.getGroupType();
        String groupDescriptor = getTypeDescriptor(groupType, javaClassCodec);
        final MethodVisitor mv = cv.visitMethod(ACC_PRIVATE, "readStaticGroup_" + group.getName(),
                "(Lcom/cinnober/msgcodec/io/ByteSource;" + groupDescriptor + ")V", null,
                new String[] { "java/io/IOException" });
        mv.visitCode();/*from  w ww. j a  v a  2 s .c  o m*/
        final LocalVariable nextVar = new LocalVariable(3);

        // read fields of super group
        if (group.getSuperGroup() != null) {
            GroupDef superGroup = schema.getGroup(group.getSuperGroup());
            Object superGroupType = superGroup.getGroupType();
            String superGroupDescriptor = getTypeDescriptor(superGroupType, javaClassCodec);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitVarInsn(ALOAD, 1);
            mv.visitVarInsn(ALOAD, 2);
            mv.visitMethodInsn(INVOKEVIRTUAL, genClassInternalName, "readStaticGroup_" + superGroup.getName(),
                    "(Lcom/cinnober/msgcodec/io/ByteSource;" + superGroupDescriptor + ")V", false);
        }

        // fields
        for (final FieldDef field : group.getFields()) {
            final Class<?> javaClass = field.getJavaClass();

            Runnable readValue = () -> {
                Label tryStart = new Label();
                Label tryEnd = new Label();
                Label tryCatch = new Label();
                Label tryAfter = new Label();
                mv.visitTryCatchBlock(tryStart, tryEnd, tryCatch, "java/lang/Exception");

                mv.visitLabel(tryStart);
                mv.visitVarInsn(ALOAD, 1); // input stream
                generateDecodeValue(mv, 1, nextVar, field.isRequired(), field.getType(), javaClass,
                        field.getComponentJavaClass(), schema, genClassInternalName,
                        group.getName() + "_" + field.getName(), group.getName() + "." + field.getName(),
                        javaClassCodec);
                mv.visitLabel(tryEnd);
                mv.visitJumpInsn(GOTO, tryAfter);
                mv.visitLabel(tryCatch);
                int caughtExVar = nextVar.next();
                mv.visitVarInsn(ASTORE, caughtExVar);
                mv.visitTypeInsn(NEW, "com/cinnober/msgcodec/blink/FieldDecodeException");
                mv.visitInsn(DUP);
                mv.visitLdcInsn(field.getName());
                mv.visitVarInsn(ALOAD, caughtExVar);
                mv.visitMethodInsn(INVOKESPECIAL, "com/cinnober/msgcodec/blink/FieldDecodeException", "<init>",
                        "(Ljava/lang/String;Ljava/lang/Throwable;)V", false);
                mv.visitInsn(ATHROW);
                mv.visitLabel(tryAfter);
            };

            Accessor<?, ?> accessor = field.getAccessor();
            if (isPublicFieldAccessor(accessor)) {
                Field f = ((FieldAccessor) accessor).getField();
                mv.visitVarInsn(ALOAD, 2); // instance
                // value
                readValue.run();
                // store
                mv.visitFieldInsn(PUTFIELD, Type.getInternalName(f.getDeclaringClass()), f.getName(),
                        Type.getDescriptor(f.getType()));
            } else if (accessor.getClass() == CreateAccessor.class) {
                mv.visitVarInsn(ALOAD, 2); // instance

                Label tryStart = new Label();
                Label tryEnd = new Label();
                Label tryCatch = new Label();
                Label tryAfter = new Label();
                mv.visitTryCatchBlock(tryStart, tryEnd, tryCatch, "java/lang/Exception");

                mv.visitLabel(tryStart);
                mv.visitVarInsn(ALOAD, 1); // input stream

                generateDecodeDummy(mv, 1, nextVar, field.isRequired(), field.getType(), javaClass,
                        field.getComponentJavaClass(), schema, genClassInternalName,
                        group.getName() + "." + field.getName(), javaClassCodec);

                mv.visitInsn(POP);

                mv.visitLabel(tryEnd);
                mv.visitJumpInsn(GOTO, tryAfter);
                mv.visitLabel(tryCatch);
                int caughtExVar = nextVar.next();
                mv.visitVarInsn(ASTORE, caughtExVar);
                mv.visitTypeInsn(NEW, "com/cinnober/msgcodec/blink/FieldDecodeException");
                mv.visitInsn(DUP);
                mv.visitLdcInsn(field.getName());
                mv.visitVarInsn(ALOAD, caughtExVar);
                mv.visitMethodInsn(INVOKESPECIAL, "com/cinnober/msgcodec/blink/FieldDecodeException", "<init>",
                        "(Ljava/lang/String;Ljava/lang/Throwable;)V", false);
                mv.visitInsn(ATHROW);
                mv.visitLabel(tryAfter);

                mv.visitInsn(POP);
            } else {
                // accessor
                mv.visitVarInsn(ALOAD, 0);
                mv.visitFieldInsn(GETFIELD, genClassInternalName,
                        "accessor_" + group.getName() + "_" + field.getName(),
                        "Lcom/cinnober/msgcodec/Accessor;");
                // instance
                mv.visitVarInsn(ALOAD, 2); // instance
                // value
                readValue.run();
                if (javaClass.isPrimitive()) {
                    box(mv, javaClass);
                }
                // store
                mv.visitMethodInsn(INVOKEINTERFACE, "com/cinnober/msgcodec/Accessor", "setValue",
                        "(Ljava/lang/Object;Ljava/lang/Object;)V", true);
            }
        }

        mv.visitInsn(RETURN);
        mv.visitMaxs(6, nextVar.get());
        mv.visitEnd();
    }
}

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

License:Open Source License

/**
 * Generate value encoding using the blink output.
 *
 * <p>Defaults to <code>writeDynamicGroup[Null]</code> in the generated codec.
 *
 * @param required true if the field is required, otherwise false.
 * @param mv the method visitor, not null.
 * @see #generateEncodeValue//ww  w . ja  v  a2  s  .com
 */
protected void generateEncodeDynRefValue(LocalVariable nextVar, MethodVisitor mv, boolean required) {
    // PENDING: validate that the instance class is a subclass of refGroup (unless null)
    int instanceVar = nextVar.next();
    mv.visitVarInsn(ASTORE, instanceVar);
    mv.visitVarInsn(ALOAD, 0); // this
    mv.visitInsn(SWAP); // this and out
    mv.visitVarInsn(ALOAD, instanceVar);
    if (required) {
        mv.visitMethodInsn(INVOKEVIRTUAL, baseclassIName, "writeDynamicGroup",
                "(Lcom/cinnober/msgcodec/io/ByteSink;Ljava/lang/Object;)V", false);
    } else {
        mv.visitMethodInsn(INVOKEVIRTUAL, baseclassIName, "writeDynamicGroupNull",
                "(Lcom/cinnober/msgcodec/io/ByteSink;Ljava/lang/Object;)V", false);
    }
}

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

License:Open Source License

protected void generateEncodeRefValue(GroupDef refGroup, boolean required, LocalVariable nextVar,
        MethodVisitor mv, String genClassInternalName, int outputStreamVar, TypeDef.Reference type,
        boolean javaClassCodec) throws IllegalArgumentException {
    if (refGroup != null) {
        Object refGroupType = refGroup.getGroupType();
        String refGroupDescriptor = getTypeDescriptor(refGroupType, javaClassCodec);
        if (required) {
            int instanceVar = nextVar.next();
            mv.visitVarInsn(ASTORE, instanceVar);
            mv.visitVarInsn(ALOAD, 0); // this
            mv.visitInsn(SWAP); // this and out
            mv.visitVarInsn(ALOAD, instanceVar);
            mv.visitMethodInsn(INVOKEVIRTUAL, genClassInternalName, "writeStaticGroup_" + refGroup.getName(),
                    "(Lcom/cinnober/msgcodec/io/ByteSink;" + refGroupDescriptor + ")V", false);
        } else {//  w w  w  .  java 2  s .  c o m
            int instanceVar = nextVar.next();
            mv.visitInsn(DUP);
            Label nonNullLabel = new Label();
            Label endLabel = new Label();
            mv.visitJumpInsn(IFNONNULL, nonNullLabel);
            // null
            mv.visitInsn(POP);
            mv.visitInsn(ICONST_0); // false
            mv.visitMethodInsn(INVOKESTATIC, blinkOutputIName, "writePresenceByte",
                    "(Lcom/cinnober/msgcodec/io/ByteSink;Z)V", false);
            mv.visitJumpInsn(GOTO, endLabel);

            // not null
            mv.visitLabel(nonNullLabel);
            // PENDING: mv.visitFrame?
            mv.visitVarInsn(ASTORE, instanceVar);
            mv.visitInsn(ICONST_1); // true
            mv.visitMethodInsn(INVOKESTATIC, blinkOutputIName, "writePresenceByte",
                    "(Lcom/cinnober/msgcodec/io/ByteSink;Z)V", false);
            mv.visitVarInsn(ALOAD, 0); // this
            mv.visitVarInsn(ALOAD, outputStreamVar);
            mv.visitVarInsn(ALOAD, instanceVar);
            mv.visitMethodInsn(INVOKEVIRTUAL, genClassInternalName, "writeStaticGroup_" + refGroup.getName(),
                    "(Lcom/cinnober/msgcodec/io/ByteSink;" + refGroupDescriptor + ")V", false);
            mv.visitLabel(endLabel);
            // PENDING: mv.visitFrame?
        }
    } else {
        throw new IllegalArgumentException("Illegal reference: " + type);
    }
}

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

License:Open Source License

protected void generateEncodeSequenceValue(Class<?> javaClass, LocalVariable nextVar, MethodVisitor mv,
        boolean required, int outputStreamVar, Class<?> componentJavaClass, TypeDef type, Schema schema,
        String genClassInternalName, String fieldIdentifier, String debugValueLabel, boolean javaClassCodec)
        throws IllegalArgumentException {

    // PENDING: merge the two if-cases, and reuse common code blocks (see generateDecodeSquenceValue)
    if (javaClass.isArray()) {
        int sequenceVar = nextVar.next();
        mv.visitInsn(DUP);/*from ww w.  ja v  a  2 s  .  c o m*/
        mv.visitVarInsn(ASTORE, sequenceVar);
        int lengthVar = nextVar.next();
        Label endLabel = new Label();
        if (required) {
            mv.visitInsn(ARRAYLENGTH);
            mv.visitInsn(DUP);
            mv.visitVarInsn(ISTORE, lengthVar);
            mv.visitMethodInsn(INVOKESTATIC, blinkOutputIName, "writeUInt32",
                    "(Lcom/cinnober/msgcodec/io/ByteSink;I)V", false);
        } else {
            Label nonNullLabel = new Label();
            mv.visitInsn(DUP);
            mv.visitJumpInsn(IFNONNULL, nonNullLabel);
            // null
            mv.visitInsn(POP);
            mv.visitMethodInsn(INVOKESTATIC, blinkOutputIName, "writeNull",
                    "(Lcom/cinnober/msgcodec/io/ByteSink;)V", false);
            mv.visitJumpInsn(GOTO, endLabel);
            // not null
            mv.visitLabel(nonNullLabel);
            // PENDING: mv.visitFrame?
            mv.visitInsn(ARRAYLENGTH);
            mv.visitInsn(DUP);
            mv.visitVarInsn(ISTORE, lengthVar);
            mv.visitMethodInsn(INVOKESTATIC, blinkOutputIName, "writeUInt32",
                    "(Lcom/cinnober/msgcodec/io/ByteSink;I)V", false);
        }
        // for loop
        int loopVar = nextVar.next();
        mv.visitInsn(ICONST_0);
        mv.visitVarInsn(ISTORE, loopVar);
        Label loopLabel = new Label();
        mv.visitLabel(loopLabel);
        // PENDING: mv.visitFrame?
        mv.visitVarInsn(ILOAD, loopVar);
        mv.visitVarInsn(ILOAD, lengthVar);
        mv.visitJumpInsn(IF_ICMPGE, endLabel);
        mv.visitVarInsn(ALOAD, outputStreamVar);
        mv.visitVarInsn(ALOAD, sequenceVar);
        mv.visitVarInsn(ILOAD, loopVar);
        if (componentJavaClass == byte.class || componentJavaClass == boolean.class) {
            mv.visitInsn(BALOAD);
        } else if (componentJavaClass == short.class) {
            mv.visitInsn(SALOAD);
        } else if (componentJavaClass == int.class) {
            mv.visitInsn(IALOAD);
        } else if (componentJavaClass == long.class) {
            mv.visitInsn(LALOAD);
        } else if (componentJavaClass == float.class) {
            mv.visitInsn(FALOAD);
        } else if (componentJavaClass == double.class) {
            mv.visitInsn(DALOAD);
        } else if (componentJavaClass == char.class) {
            mv.visitInsn(CALOAD);
        } else {
            mv.visitInsn(AALOAD);
            mv.visitTypeInsn(CHECKCAST, Type.getInternalName(componentJavaClass));
        }

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

        mv.visitIincInsn(loopVar, 1);
        mv.visitJumpInsn(GOTO, loopLabel);
        mv.visitLabel(endLabel);
        // PENDING: mv.visitFrame?

    } else if (javaClass == List.class) {
        int sequenceVar = nextVar.next();
        mv.visitInsn(DUP);
        mv.visitVarInsn(ASTORE, sequenceVar);
        int lengthVar = nextVar.next();
        Label endLabel = new Label();
        if (required) {
            mv.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "size", "()I", true);
            mv.visitInsn(DUP);
            mv.visitVarInsn(ISTORE, lengthVar);
            mv.visitMethodInsn(INVOKESTATIC, blinkOutputIName, "writeUInt32",
                    "(Lcom/cinnober/msgcodec/io/ByteSink;I)V", false);
        } else {
            Label nonNullLabel = new Label();
            mv.visitInsn(DUP);
            mv.visitJumpInsn(IFNONNULL, nonNullLabel);
            // null
            mv.visitInsn(POP);
            mv.visitMethodInsn(INVOKESTATIC, blinkOutputIName, "writeNull",
                    "(Lcom/cinnober/msgcodec/io/ByteSink;)V", false);
            mv.visitJumpInsn(GOTO, endLabel);
            // not null
            mv.visitLabel(nonNullLabel);
            // PENDING: mv.visitFrame?
            mv.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "size", "()I", true);
            mv.visitInsn(DUP);
            mv.visitVarInsn(ISTORE, lengthVar);
            mv.visitMethodInsn(INVOKESTATIC, blinkOutputIName, "writeUInt32",
                    "(Lcom/cinnober/msgcodec/io/ByteSink;I)V", false);
        }
        // for loop, using iterator
        int iteratorVar = nextVar.next();
        mv.visitVarInsn(ALOAD, sequenceVar);
        mv.visitMethodInsn(INVOKEINTERFACE, "java/util/List", "iterator", "()Ljava/util/Iterator;", true);
        mv.visitVarInsn(ASTORE, iteratorVar);
        Label loopLabel = new Label();
        mv.visitLabel(loopLabel);
        // PENDING: mv.visitFrame?
        mv.visitVarInsn(ALOAD, iteratorVar);
        mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "hasNext", "()Z", true);
        mv.visitJumpInsn(IFEQ, endLabel);
        mv.visitVarInsn(ALOAD, outputStreamVar);
        mv.visitVarInsn(ALOAD, iteratorVar);
        mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Iterator", "next", "()Ljava/lang/Object;", true);
        if (componentJavaClass.isPrimitive()) {
            mv.visitTypeInsn(CHECKCAST, Type.getInternalName(box(componentJavaClass)));
            unbox(mv, componentJavaClass);
        } else {
            mv.visitTypeInsn(CHECKCAST, Type.getInternalName(componentJavaClass));
        }

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

        mv.visitJumpInsn(GOTO, loopLabel);
        mv.visitLabel(endLabel);
        // PENDING: mv.visitFrame?
    } else {
        throw new IllegalArgumentException("Illegal sequence javaClass: " + javaClass);
    }
}

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

License:Open Source License

protected void generateEncodeEnumValue(TypeDef.Enum enumType, String genClassInternalName,
        String fieldIdentifier, LocalVariable nextVar, Class<?> javaClass, boolean required, MethodVisitor mv,
        String debugValueLabel) throws IllegalArgumentException {

    Label writeValueLabel = new Label();

    // Make sure that no unsupported javaClass is used for an enum
    if (javaClass != int.class && javaClass != Integer.class && (javaClass == null || !javaClass.isEnum())) {
        throw new IllegalArgumentException("Illegal enum javaClass: " + javaClass);
    }//w  ww.  j av a2 s  .co m

    // If null do not look it up
    if (!required) {
        Label lookupIdLabel = new Label();
        mv.visitInsn(DUP);
        mv.visitJumpInsn(IFNONNULL, lookupIdLabel);

        // null
        mv.visitInsn(POP);
        mv.visitInsn(ACONST_NULL);
        mv.visitJumpInsn(GOTO, writeValueLabel);

        // not null
        mv.visitLabel(lookupIdLabel);
    }

    // SymbolMapping
    if (required && !javaClass.isEnum()) {
        box(mv, int.class);
    }
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, genClassInternalName, "symbolMapping_" + fieldIdentifier,
            "Lcom/cinnober/msgcodec/SymbolMapping;");
    mv.visitInsn(SWAP);
    mv.visitMethodInsn(INVOKEINTERFACE, "com/cinnober/msgcodec/SymbolMapping", "getId",
            "(Ljava/lang/Object;)Ljava/lang/Integer;", true);

    // Write the value
    mv.visitLabel(writeValueLabel);
    if (required) {
        unbox(mv, Integer.class); // TODO: Should null check before this and throw exception since there was no mapping
    }
    generateEncodeInt32Value(required, mv);

    //        if (javaClass.isEnum()) {
    //            Label endLabel = new Label();
    //            if (!required) {
    //                Label nonNullLabel = new Label();
    //                mv.visitInsn(DUP);
    //                mv.visitJumpInsn(IFNONNULL, nonNullLabel);
    //                // null
    //                mv.visitInsn(POP);
    //                mv.visitInsn(ACONST_NULL);
    //                mv.visitMethodInsn(INVOKESTATIC, blinkOutputIName, "writeInt32Null",
    //                        "(Lcom/cinnober/msgcodec/io/ByteSink;Ljava/lang/Integer;)V", false);
    //                mv.visitJumpInsn(GOTO, endLabel);
    //                // not null
    //                mv.visitLabel(nonNullLabel);
    //            }
    //            mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Enum", "ordinal", "()I", false);
    //            //switch
    //            EnumSymbols enumSymbols = new EnumSymbols(enumType, javaClass);
    //            Enum[] enumValues = ((Class<Enum>)javaClass).getEnumConstants();
    //            int[] ordinals = new int[enumValues.length];
    //            Label[] labels = new Label[enumValues.length];
    //            for (int i=0; i<enumValues.length; i++) {
    //                ordinals[i] = i;
    //                labels[i] = new Label();
    //            }
    //            Label defaultLabel = new Label();
    //            Label writeLabel = new Label();
    //            int symbolIdVar = nextVar.next();
    //            mv.visitLookupSwitchInsn(defaultLabel, ordinals, labels);
    //            for (int i=0; i<enumValues.length; i++) {
    //                mv.visitLabel(labels[i]);
    //                Symbol symbol = enumSymbols.getSymbol(enumValues[i]);
    //                if (symbol != null) {
    //                    mv.visitLdcInsn(symbol.getId());
    //                    mv.visitJumpInsn(GOTO, writeLabel);
    //                } else {
    //                    mv.visitLdcInsn(debugValueLabel);
    //                    mv.visitVarInsn(ALOAD, symbolIdVar);
    //                    mv.visitMethodInsn(INVOKESTATIC, baseclassIName, "unmappableEnumSymbolValue",
    //                            "(Ljava/lang/String;Ljava/lang/Enum;)Ljava/lang/IllegalArgumentException;", false);
    //                    mv.visitInsn(ATHROW);
    //                }
    //            }
    //            mv.visitLabel(defaultLabel);
    //            mv.visitTypeInsn(NEW, "java/lang/RuntimeException");
    //            mv.visitInsn(DUP);
    //            mv.visitLdcInsn("Should not happen: reached generated switch default case for value " + debugValueLabel);
    //            mv.visitMethodInsn(INVOKESPECIAL, "java/lang/RuntimeException", "<init>", "(Ljava/lang/String;)V", false);
    //            mv.visitInsn(ATHROW);
    //
    //            // write
    //            mv.visitLabel(writeLabel);
    //            if (!required) {
    //                box(mv, int.class);
    //            }
    //            generateEncodeInt32Value(required, mv);
    //            // end
    //            mv.visitLabel(endLabel);
    //        } else if (javaClass == int.class || javaClass == Integer.class) {
    //            generateEncodeInt32Value(required, mv);
    //        } else {
    //            throw new IllegalArgumentException("Illegal enum javaClass: " + javaClass);
    //        }
}

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

License:Open Source License

/**
 * Generate value decoding using the blink input.
 *
 * <p>Defaults to <code>readBinary[Null].</code>
 *
 * @param required true if the field is required, otherwise false.
 * @param mv the method visitor, not null.
 * @see #generateDecodeValue/*ww  w. j a v  a2 s .  c  o  m*/
 */
protected void generateDecodeBinaryValue(TypeDef.Binary type, MethodVisitor mv, boolean required) {
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKEVIRTUAL, baseclassIName, "getMaxBinarySize", "()I", false);
    if (required) {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readBinary",
                "(Lcom/cinnober/msgcodec/io/ByteSource;I)[B", false);
    } else {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readBinaryNull",
                "(Lcom/cinnober/msgcodec/io/ByteSource;I)[B", 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>readStringUTF8[Null].</code>
 *
 * @param required true if the field is required, otherwise false.
 * @param mv the method visitor, not null.
 * @see #generateDecodeValue/* w  ww. ja va2  s.c  om*/
 */
protected void generateDecodeStringValue(TypeDef.StringUnicode type, MethodVisitor mv, boolean required) {
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKEVIRTUAL, baseclassIName, "getMaxBinarySize", "()I", false);
    if (required) {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readStringUTF8",
                "(Lcom/cinnober/msgcodec/io/ByteSource;I)Ljava/lang/String;", false);
    } else {
        mv.visitMethodInsn(INVOKESTATIC, blinkInputIName, "readStringUTF8Null",
                "(Lcom/cinnober/msgcodec/io/ByteSource;I)Ljava/lang/String;", 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 {/* w  ww  .j  av a  2s . c  om*/
            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);
    }
}