programclassreader.java

ProGuard 是一个免费的 Java类文件的压缩

    public void visitSourceFileAttribute(Clazz clazz, SourceFileAttribute sourceFileAttribute)
    {
        sourceFileAttribute.u2sourceFileIndex = dataInput.readUnsignedShort();
    }


    public void visitSourceDirAttribute(Clazz clazz, SourceDirAttribute sourceDirAttribute)
    {
        sourceDirAttribute.u2sourceDirIndex = dataInput.readUnsignedShort();
    }


    public void visitInnerClassesAttribute(Clazz clazz, InnerClassesAttribute innerClassesAttribute)
    {
        // Read the inner classes.
        innerClassesAttribute.u2classesCount = dataInput.readUnsignedShort();

        innerClassesAttribute.classes = new InnerClassesInfo[innerClassesAttribute.u2classesCount];
        for (int index = 0; index < innerClassesAttribute.u2classesCount; index++)
        {
            InnerClassesInfo innerClassesInfo = new InnerClassesInfo();
            this.visitInnerClassesInfo(clazz, innerClassesInfo);
            innerClassesAttribute.classes[index] = innerClassesInfo;
        }
    }


    public void visitEnclosingMethodAttribute(Clazz clazz, EnclosingMethodAttribute enclosingMethodAttribute)
    {
        enclosingMethodAttribute.u2classIndex       = dataInput.readUnsignedShort();
        enclosingMethodAttribute.u2nameAndTypeIndex = dataInput.readUnsignedShort();
    }


    public void visitDeprecatedAttribute(Clazz clazz, DeprecatedAttribute deprecatedAttribute)
    {
        // This attribute does not contain any additional information.
    }


    public void visitSyntheticAttribute(Clazz clazz, SyntheticAttribute syntheticAttribute)
    {
        // This attribute does not contain any additional information.
    }


    public void visitSignatureAttribute(Clazz clazz, SignatureAttribute signatureAttribute)
    {
        signatureAttribute.u2signatureIndex = dataInput.readUnsignedShort();
    }


    public void visitConstantValueAttribute(Clazz clazz, Field field, ConstantValueAttribute constantValueAttribute)
    {
        constantValueAttribute.u2constantValueIndex = dataInput.readUnsignedShort();
    }


    public void visitExceptionsAttribute(Clazz clazz, Method method, ExceptionsAttribute exceptionsAttribute)
    {
        // Read the exceptions.
        exceptionsAttribute.u2exceptionIndexTableLength = dataInput.readUnsignedShort();

        exceptionsAttribute.u2exceptionIndexTable = new int[exceptionsAttribute.u2exceptionIndexTableLength];
        for (int index = 0; index < exceptionsAttribute.u2exceptionIndexTableLength; index++)
        {
            exceptionsAttribute.u2exceptionIndexTable[index] = dataInput.readUnsignedShort();
        }
    }


    public void visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute)
    {
        // Read the stack size and local variable frame size.
        codeAttribute.u2maxStack   = dataInput.readUnsignedShort();
        codeAttribute.u2maxLocals  = dataInput.readUnsignedShort();

        // Read the byte code.
        codeAttribute.u4codeLength = dataInput.readInt();

        byte[] code = new byte[codeAttribute.u4codeLength];
        dataInput.readFully(code);
        codeAttribute.code = code;

        // Read the exceptions.
        codeAttribute.u2exceptionTableLength = dataInput.readUnsignedShort();

        codeAttribute.exceptionTable = new ExceptionInfo[codeAttribute.u2exceptionTableLength];
        for (int index = 0; index < codeAttribute.u2exceptionTableLength; index++)
        {
            ExceptionInfo exceptionInfo = new ExceptionInfo();
            this.visitExceptionInfo(clazz, method, codeAttribute, exceptionInfo);
            codeAttribute.exceptionTable[index] = exceptionInfo;
        }

        // Read the code attributes.
        codeAttribute.u2attributesCount = dataInput.readUnsignedShort();

        codeAttribute.attributes = new Attribute[codeAttribute.u2attributesCount];
        for (int index = 0; index < codeAttribute.u2attributesCount; index++)
        {
            Attribute attribute = createAttribute(clazz);
            attribute.accept(clazz, method, codeAttribute, this);
            codeAttribute.attributes[index] = attribute;
        }
    }


    public void visitStackMapAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, StackMapAttribute stackMapAttribute)
    {
        // Read the stack map frames (only full frames, without tag).
        stackMapAttribute.u2stackMapFramesCount = dataInput.readUnsignedShort();

        stackMapAttribute.stackMapFrames = new FullFrame[stackMapAttribute.u2stackMapFramesCount];
        for (int index = 0; index < stackMapAttribute.u2stackMapFramesCount; index++)
        {
            FullFrame stackMapFrame = new FullFrame();
            this.visitFullFrame(clazz, method, codeAttribute, index, stackMapFrame);
            stackMapAttribute.stackMapFrames[index] = stackMapFrame;
        }
    }


    public void visitStackMapTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, StackMapTableAttribute stackMapTableAttribute)
    {
        // Read the stack map frames.
        stackMapTableAttribute.u2stackMapFramesCount = dataInput.readUnsignedShort();

        stackMapTableAttribute.stackMapFrames = new StackMapFrame[stackMapTableAttribute.u2stackMapFramesCount];
        for (int index = 0; index < stackMapTableAttribute.u2stackMapFramesCount; index++)
        {
            StackMapFrame stackMapFrame = createStackMapFrame();
            stackMapFrame.accept(clazz, method, codeAttribute, 0, this);
            stackMapTableAttribute.stackMapFrames[index] = stackMapFrame;
        }
    }


    public void visitLineNumberTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LineNumberTableAttribute lineNumberTableAttribute)
    {
        // Read the line numbers.
        lineNumberTableAttribute.u2lineNumberTableLength = dataInput.readUnsignedShort();

        lineNumberTableAttribute.lineNumberTable = new LineNumberInfo[lineNumberTableAttribute.u2lineNumberTableLength];
        for (int index = 0; index < lineNumberTableAttribute.u2lineNumberTableLength; index++)
        {
            LineNumberInfo lineNumberInfo = new LineNumberInfo();
            this.visitLineNumberInfo(clazz, method, codeAttribute, lineNumberInfo);
            lineNumberTableAttribute.lineNumberTable[index] = lineNumberInfo;
        }
    }


    public void visitLocalVariableTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTableAttribute localVariableTableAttribute)
    {
        // Read the local variables.
        localVariableTableAttribute.u2localVariableTableLength = dataInput.readUnsignedShort();

        localVariableTableAttribute.localVariableTable = new LocalVariableInfo[localVariableTableAttribute.u2localVariableTableLength];
        for (int index = 0; index < localVariableTableAttribute.u2localVariableTableLength; index++)
        {
            LocalVariableInfo localVariableInfo = new LocalVariableInfo();
            this.visitLocalVariableInfo(clazz, method, codeAttribute, localVariableInfo);
            localVariableTableAttribute.localVariableTable[index] = localVariableInfo;
        }
    }


    public void visitLocalVariableTypeTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeTableAttribute localVariableTypeTableAttribute)
    {
        // Read the local variable types.
        localVariableTypeTableAttribute.u2localVariableTypeTableLength = dataInput.readUnsignedShort();

        localVariableTypeTableAttribute.localVariableTypeTable = new LocalVariableTypeInfo[localVariableTypeTableAttribute.u2localVariableTypeTableLength];
        for (int index = 0; index < localVariableTypeTableAttribute.u2localVariableTypeTableLength; index++)
        {
            LocalVariableTypeInfo localVariableTypeInfo = new LocalVariableTypeInfo();
            this.visitLocalVariableTypeInfo(clazz, method, codeAttribute, localVariableTypeInfo);
            localVariableTypeTableAttribute.localVariableTypeTable[index] = localVariableTypeInfo;
        }
    }


    public void visitAnyAnnotationsAttribute(Clazz clazz, AnnotationsAttribute annotationsAttribute)
    {
        // Read the annotations.
        annotationsAttribute.u2annotationsCount = dataInput.readUnsignedShort();

        annotationsAttribute.annotations = new Annotation[annotationsAttribute.u2annotationsCount];
        for (int index = 0; index < annotationsAttribute.u2annotationsCount; index++)
        {
            Annotation annotation = new Annotation();
            this.visitAnnotation(clazz, annotation);
            annotationsAttribute.annotations[index] = annotation;
        }
    }


    public void visitAnyParameterAnnotationsAttribute(Clazz clazz, Method method, ParameterAnnotationsAttribute parameterAnnotationsAttribute)
    {
        // Read the parameter annotations.
        parameterAnnotationsAttribute.u2parametersCount    = dataInput.readUnsignedByte();
        parameterAnnotationsAttribute.parameterAnnotations = new Annotation[parameterAnnotationsAttribute.u2parametersCount][];

        for (int parameterIndex = 0; parameterIndex < parameterAnnotationsAttribute.u2parametersCount; parameterIndex++)
        {
            // Read the parameter annotations of the given parameter.
            int u2annotationsCount = dataInput.readUnsignedShort();

            Annotation[] annotations = new Annotation[u2annotationsCount];

            for (int index = 0; index < u2annotationsCount; index++)
            {
                Annotation annotation = new Annotation();
                this.visitAnnotation(clazz, annotation);
                annotations[index] = annotation;
            }

            parameterAnnotationsAttribute.parameterAnnotations[parameterIndex] = annotations;
        }
    }


    public void visitAnnotationDefaultAttribute(Clazz clazz, Method method, AnnotationDefaultAttribute annotationDefaultAttribute)
    {
        // Read the default element value.
        ElementValue elementValue = createElementValue();
        elementValue.accept(clazz, null, this);
        annotationDefaultAttribute.defaultValue = elementValue;
    }


    // Implementations for InnerClassesInfoVisitor.

    public void visitInnerClassesInfo(Clazz clazz, InnerClassesInfo innerClassesInfo)
    {
        innerClassesInfo.u2innerClassIndex       = dataInput.readUnsignedShort();
        innerClassesInfo.u2outerClassIndex       = dataInput.readUnsignedShort();
        innerClassesInfo.u2innerNameIndex        = dataInput.readUnsignedShort();
        innerClassesInfo.u2innerClassAccessFlags = dataInput.readUnsignedShort();
    }


    // Implementations for ExceptionInfoVisitor.

    public void visitExceptionInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, ExceptionInfo exceptionInfo)
    {
        exceptionInfo.u2startPC   = dataInput.readUnsignedShort();
        exceptionInfo.u2endPC     = dataInput.readUnsignedShort();
        exceptionInfo.u2handlerPC = dataInput.readUnsignedShort();
        exceptionInfo.u2catchType = dataInput.readUnsignedShort();
    }


    // Implementations for StackMapFrameVisitor.

    public void visitSameZeroFrame(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, SameZeroFrame sameZeroFrame)
    {
        if (sameZeroFrame.getTag() == StackMapFrame.SAME_ZERO_FRAME_EXTENDED)
        {
            sameZeroFrame.u2offsetDelta = dataInput.readUnsignedShort();
        }
    }


    public void visitSameOneFrame(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, SameOneFrame sameOneFrame)
    {
        if (sameOneFrame.getTag() == StackMapFrame.SAME_ONE_FRAME_EXTENDED)
        {
            sameOneFrame.u2offsetDelta = dataInput.readUnsignedShort();
        }

        // Read the verification type of the stack entry.
        VerificationType verificationType = createVerificationType();
        verificationType.accept(clazz, method, codeAttribute, offset, this);
        sameOneFrame.stackItem = verificationType;
    }


    public void visitLessZeroFrame(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, LessZeroFrame lessZeroFrame)
    {
        lessZeroFrame.u2offsetDelta = dataInput.readUnsignedShort();
    }