/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2011 Eric Lafortune (eric@graphics.cornell.edu)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.classfile.io;
import proguard.classfile.*;
import proguard.classfile.attribute.*;
import proguard.classfile.attribute.annotation.*;
import proguard.classfile.attribute.annotation.visitor.*;
import proguard.classfile.attribute.preverification.*;
import proguard.classfile.attribute.preverification.visitor.*;
import proguard.classfile.attribute.visitor.*;
import proguard.classfile.constant.*;
import proguard.classfile.constant.visitor.ConstantVisitor;
import proguard.classfile.util.*;
import proguard.classfile.visitor.*;
import java.io.DataInput;
/**
* This ClassVisitor fills out the ProgramClass objects that it visits with data
* from the given DataInput object.
*
* @author Eric Lafortune
*/
public class ProgramClassReader
extends SimplifiedVisitor
implements ClassVisitor,
MemberVisitor,
ConstantVisitor,
AttributeVisitor,
BootstrapMethodInfoVisitor,
InnerClassesInfoVisitor,
ExceptionInfoVisitor,
StackMapFrameVisitor,
VerificationTypeVisitor,
LineNumberInfoVisitor,
LocalVariableInfoVisitor,
LocalVariableTypeInfoVisitor,
AnnotationVisitor,
ElementValueVisitor
{
private final RuntimeDataInput dataInput;
/**
* Creates a new ProgramClassReader for reading from the given DataInput.
*/
public ProgramClassReader(DataInput dataInput)
{
this.dataInput = new RuntimeDataInput(dataInput);
}
// Implementations for ClassVisitor.
public void visitProgramClass(ProgramClass programClass)
{
// Read and check the magic number.
programClass.u4magic = dataInput.readInt();
ClassUtil.checkMagicNumber(programClass.u4magic);
// Read and check the version numbers.
int u2minorVersion = dataInput.readUnsignedShort();
int u2majorVersion = dataInput.readUnsignedShort();
programClass.u4version = ClassUtil.internalClassVersion(u2majorVersion,
u2minorVersion);
ClassUtil.checkVersionNumbers(programClass.u4version);
// Read the constant pool. Note that the first entry is not used.
programClass.u2constantPoolCount = dataInput.readUnsignedShort();
programClass.constantPool = new Constant[programClass.u2constantPoolCount];
for (int index = 1; index < programClass.u2constantPoolCount; index++)
{
Constant constant = createConstant();
constant.accept(programClass, this);
programClass.constantPool[index] = constant;
// Long constants and double constants take up two entries in the
// constant pool.
int tag = constant.getTag();
if (tag == ClassConstants.CONSTANT_Long ||
tag == ClassConstants.CONSTANT_Double)
{
programClass.constantPool[++index] = null;
}
}
// Read the general class information.
programClass.u2accessFlags = dataInput.readUnsignedShort();
programClass.u2thisClass = dataInput.readUnsignedShort();
programClass.u2superClass = dataInput.readUnsignedShort();
// Read the interfaces.
programClass.u2interfacesCount = dataInput.readUnsignedShort();
programClass.u2interfaces = new int[programClass.u2interfacesCount];
for (int index = 0; index < programClass.u2interfacesCount; index++)
{
programClass.u2interfaces[index] = dataInput.readUnsignedShort();
}
// Read the fields.
programClass.u2fieldsCount = dataInput.readUnsignedShort();
programClass.fields = new ProgramField[programClass.u2fieldsCount];
for (int index = 0; index < programClass.u2fieldsCount; index++)
{
ProgramField programField = new ProgramField();
this.visitProgramField(programClass, programField);
programClass.fields[index] = programField;
}
// Read the methods.
programClass.u2methodsCount = dataInput.readUnsignedShort();
programClass.methods = new ProgramMethod[programClass.u2methodsCount];
for (int index = 0; index < programClass.u2methodsCount; index++)
{
ProgramMethod programMethod = new ProgramMethod();
this.visitProgramMethod(programClass, programMethod);
programClass.methods[index] = programMethod;
}
// Read the class attributes.
programClass.u2attributesCount = dataInput.readUnsignedShort();
programClass.attributes = new Attribute[programClass.u2attributesCount];
for (int index = 0; index < programClass.u2attributesCount; index++)
{
Attribute attribute = createAttribute(programClass);
attribute.accept(programClass, this);
programClass.attributes[index] = attribute;
}
}
public void visitLibraryClass(LibraryClass libraryClass)
{
}
// Implementations for MemberVisitor.
public void visitProgramField(ProgramClass programClass, ProgramField programField)
{
// Read the general field information.
programField.u2accessFlags = dataInput.readUnsignedShort();
programField.u2nameIndex = dataInput.readUnsignedShort();
programField.u2descriptorIndex = dataInput.readUnsignedShort();
// Read the field attributes.
programField.u2attributesCount = dataInput.readUnsignedShort();
programField.attributes = new Attribute[programField.u2attributesCount];
for (int index = 0; index < programField.u2attributesCount; index++)
{
Attribute attribute = createAttribute(programClass);
attribute.accept(programClass, programField, this);
programField.attributes[index] = attribute;
}
}
public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
{
// Read the general method information.
programMethod.u2accessFlags = dataInput.readUnsignedShort();
programMethod.u2nameIndex = dataInput.readUnsignedShort();
programMethod.u2descriptorIndex = dataInput.readUnsignedShort();
// Read the method attributes.
programMethod.u2attributesCount = dataInput.readUnsignedShort();
programMethod.attributes = new Attribute[programMethod.u2attributesCount];
for (int index = 0; index < programMethod.u2attributesCount; index++)
{
Attribute attribute = createAttribute(programClass);
attribute.accept(programClass, programMethod, this);
programMethod.attributes[index] = attribute;
}
}
public void visitLibraryMember(LibraryClass libraryClass, LibraryMember libraryMember)
{
}
// Implementations for ConstantVisitor.
public void visitIntegerConstant(Clazz clazz, IntegerConstant integerConstant)
{
integerConstant.u4value = dataInput.readInt();
}
public void visitLongConstant(Clazz clazz, LongConstant longConstant)
{
longConstant.u8value = dataInput.readLong();
}
public void visitFloatConstant(Clazz clazz, FloatConstant floatConstant)
{
floatConstant.f4value = dataInput.readFloat();
}
public void visitDoubleConstant(Clazz clazz, DoubleConstant doubleConstant)
{
doubleConstant.f8value = dataInput.readDouble();
}
public void visitStringConstant(Clazz clazz, StringConstant stringConstant)
{
stringConstant.u2stringIndex = dataInput.readUnsignedShort();
}
public void visitUtf8Constant(Clazz clazz, Utf8Constant utf8Constant)
{
int u2length = dataInput.readUnsignedShort();
// Read the UTF-8 bytes.
byte[] bytes = new byte[u2length];
dataInput.readFully(bytes);
utf8Constant.setBytes(bytes);
}
public void visitInvokeDynamicConstant(Clazz clazz, InvokeDynamicConstant invokeDynamicConstant)
{
invokeDynamicConstant.u2bootstrapMethodAttributeIndex = dataInput.readUnsignedShort();
invokeDynamicConstant.u2nameAndTypeIndex = dataInput.readUnsignedShort();
}
public void visitMethodHandleConstant(Clazz clazz, MethodHandleConstant methodHandleConstant)
{
methodHandleConstant.u1referenceKind = dataInput.readUnsignedByte();
methodHandleConstant.u2referenceIndex = dataInput.readUnsignedShort();
}
public void visitAnyRefConstant(Clazz clazz, RefConstant refConstant)
{
refConstant.u2classIndex = dataInput.readUnsignedShort();
refConstant.u2nameAndTypeIndex = dataInput.readUnsignedShort();
}
public void visitClassConstant(Clazz clazz, ClassConstant classConstant)
{
classConstant.u2nameIndex = dataInput.readUnsignedShort();
}
public void visitMethodTypeConstant(Clazz clazz, MethodTypeConstant methodTypeConstant)
{
methodTypeConstant.u2descriptorIndex = dataInput.readUnsignedShort();
}
public void visitNameAndTypeConstant(Clazz clazz, NameAndTypeConstant nameAndTypeConstant)
{
nameAndTypeConstant.u2nameIndex = dataInput.readUnsignedShort();
nameAndTypeConstant.u2descriptorIndex = dataInput.readUnsignedShort();
}
// Implementations for AttributeVisitor.
public void visitUnknownAttribute(Clazz clazz, UnknownAttribute unknownAttribute)
{
// Read the unknown information.
byte[] info = new byte[unknownAttribute.u4attributeLength];
dataInput.readFully(info);
unknownAttribute.info = info;
}
public void visitBootstrapMethodsAttribute(Clazz clazz, BootstrapMethodsAttribute bootstrapMethodsAttribute)
{
// Read the bootstrap methods.
bootstrapMethodsAttribute.u2bootstrapMethodsCount = dataInput.readUnsignedShort();
bootstrapMethodsAttribute.bootstrapMethods = new BootstrapMethodInfo[bootstrapMethodsAttribute.u2bootstrapMethodsCount];
for (int index = 0; index < bootstrapMethodsAttribute.u2bootstrapMethodsCount; index++)
{
BootstrapMethodInfo bootstrapMethodInfo = new BootstrapMethodInfo();
visitBootstrapMethodInfo(clazz, bootstrapMethodInfo);
bootstrapMethodsAttribute.bootstrapMethods[index] = bootstrapMethodInfo;
}
}
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();
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();
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();
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();
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();
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();
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();
visitAnnotation(clazz, annotation);
annotationsAttribute.annotations[index] = annotation;
}
}
public void visitAnyParameterAnnotationsAttribute(Clazz clazz, Method method, ParameterAnnotationsAttribute parameterAnnotationsAttribute)
{
// Read the parameter annotations.
parameterAnnotationsAttribute.u2parametersCount = dataInput.readUnsignedByte();
// The java compilers of JDK 1.5, JDK 1.6, and Eclipse all count the
// number of parameters of constructors of non-static inner classes
// incorrectly. Fix it right here.
int parameterStart = 0;
if (method.getName(clazz).equals(ClassConstants.INTERNAL_METHOD_NAME_INIT))
{
int realParametersCount = ClassUtil.internalMethodParameterCount(method.getDescriptor(clazz));
parameterStart = realParametersCount - parameterAnnotationsAttribute.u2parametersCount;
parameterAnnotationsAttribute.u2parametersCount = realParametersCount;
}
parameterAnnotationsAttribute.u2parameterAnnotationsCount = new int[parameterAnnotationsAttribute.u2parametersCount];
parameterAnnotationsAttribute.parameterAnnotations = new Annotation[parameterAnnotationsAttribute.u2parametersCount][];
for (int parameterIndex = parameterStart; 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();
visitAnnotation(clazz, annotation);
annotations[index] = annotation;
}
parameterAnnotationsAttribute.u2parameterAnnotationsCount[parameterIndex] = u2annotationsCount;
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 BootstrapMethodInfoVisitor.
public void visitBootstrapMethodInfo(Clazz clazz, BootstrapMethodInfo bootstrapMethodInfo)
{
bootstrapMethodInfo.u2methodHandleIndex = dataInput.readUnsignedShort();
// Read the bootstrap method arguments.
bootstrapMethodInfo.u2methodArgumentCount = dataInput.readUnsignedShort();
bootstrapMethodInfo.u2methodArguments = new int[bootstrapMethodInfo.u2methodArgumentCount];
for (int index = 0; index < bootstrapMethodInfo.u2methodArgumentCount; index++)
{
bootstrapMethodInfo.u2methodArguments[index] = dataInput.readUnsignedShort();
}
}
// 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();
}
public void visitMoreZeroFrame(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, MoreZeroFrame moreZeroFrame)
{
moreZeroFrame.u2offsetDelta = dataInput.readUnsignedShort();
// Read the verification types of the additional local variables.
moreZeroFrame.additionalVariables = new VerificationType[moreZeroFrame.additionalVariablesCount];
for (int index = 0; index < moreZeroFrame.additionalVariablesCount; index++)
{
VerificationType verificationType = createVerificationType();
verificationType.accept(clazz, method, codeAttribute, offset, this);
moreZeroFrame.additionalVariables[index] = verificationType;
}
}
public void visitFullFrame(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, FullFrame fullFrame)
{
fullFrame.u2offsetDelta = dataInput.readUnsignedShort();
// Read the verification types of the local variables.
fullFrame.variablesCount = dataInput.readUnsignedShort();
fullFrame.variables = new VerificationType[fullFrame.variablesCount];
for (int index = 0; index < fullFrame.variablesCount; index++)
{
VerificationType verificationType = createVerificationType();
verificationType.variablesAccept(clazz, method, codeAttribute, offset, index, this);
fullFrame.variables[index] = verificationType;
}
// Read the verification types of the stack entries.
fullFrame.stackCount = dataInput.readUnsignedShort();
fullFrame.stack = new VerificationType[fullFrame.stackCount];
for (int index = 0; index < fullFrame.stackCount; index++)
{
VerificationType verificationType = createVerificationType();
verificationType.stackAccept(clazz, method, codeAttribute, offset, index, this);
fullFrame.stack[index] = verificationType;
}
}
// Implementations for VerificationTypeVisitor.
public void visitAnyVerificationType(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, VerificationType verificationType)
{
// Most verification types don't contain any additional information.
}
public void visitObjectType(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, ObjectType objectType)
{
objectType.u2classIndex = dataInput.readUnsignedShort();
}
public void visitUninitializedType(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, UninitializedType uninitializedType)
{
uninitializedType.u2newInstructionOffset = dataInput.readUnsignedShort();
}
// Implementations for LineNumberInfoVisitor.
public void visitLineNumberInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LineNumberInfo lineNumberInfo)
{
lineNumberInfo.u2startPC = dataInput.readUnsignedShort();
lineNumberInfo.u2lineNumber = dataInput.readUnsignedShort();
}
// Implementations for LocalVariableInfoVisitor.
public void visitLocalVariableInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableInfo localVariableInfo)
{
localVariableInfo.u2startPC = dataInput.readUnsignedShort();
localVariableInfo.u2length = dataInput.readUnsignedShort();
localVariableInfo.u2nameIndex = dataInput.readUnsignedShort();
localVariableInfo.u2descriptorIndex = dataInput.readUnsignedShort();
localVariableInfo.u2index = dataInput.readUnsignedShort();
}
// Implementations for LocalVariableTypeInfoVisitor.
public void visitLocalVariableTypeInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeInfo localVariableTypeInfo)
{
localVariableTypeInfo.u2startPC = dataInput.readUnsignedShort();
localVariableTypeInfo.u2length = dataInput.readUnsignedShort();
localVariableTypeInfo.u2nameIndex = dataInput.readUnsignedShort();
localVariableTypeInfo.u2signatureIndex = dataInput.readUnsignedShort();
localVariableTypeInfo.u2index = dataInput.readUnsignedShort();
}
// Implementations for AnnotationVisitor.
public void visitAnnotation(Clazz clazz, Annotation annotation)
{
// Read the annotation type.
annotation.u2typeIndex = dataInput.readUnsignedShort();
// Read the element value pairs.
annotation.u2elementValuesCount = dataInput.readUnsignedShort();
annotation.elementValues = new ElementValue[annotation.u2elementValuesCount];
for (int index = 0; index < annotation.u2elementValuesCount; index++)
{
int u2elementNameIndex = dataInput.readUnsignedShort();
ElementValue elementValue = createElementValue();
elementValue.u2elementNameIndex = u2elementNameIndex;
elementValue.accept(clazz, annotation, this);
annotation.elementValues[index] = elementValue;
}
}
// Implementations for ElementValueVisitor.
public void visitConstantElementValue(Clazz clazz, Annotation annotation, ConstantElementValue constantElementValue)
{
constantElementValue.u2constantValueIndex = dataInput.readUnsignedShort();
}
public void visitEnumConstantElementValue(Clazz clazz, Annotation annotation, EnumConstantElementValue enumConstantElementValue)
{
enumConstantElementValue.u2typeNameIndex = dataInput.readUnsignedShort();
enumConstantElementValue.u2constantNameIndex = dataInput.readUnsignedShort();
}
public void visitClassElementValue(Clazz clazz, Annotation annotation, ClassElementValue classElementValue)
{
classElementValue.u2classInfoIndex = dataInput.readUnsignedShort();
}
public void visitAnnotationElementValue(Clazz clazz, Annotation annotation, AnnotationElementValue annotationElementValue)
{
// Read the annotation.
Annotation annotationValue = new Annotation();
visitAnnotation(clazz, annotationValue);
annotationElementValue.annotationValue = annotationValue;
}
public void visitArrayElementValue(Clazz clazz, Annotation annotation, ArrayElementValue arrayElementValue)
{
// Read the element values.
arrayElementValue.u2elementValuesCount = dataInput.readUnsignedShort();
arrayElementValue.elementValues = new ElementValue[arrayElementValue.u2elementValuesCount];
for (int index = 0; index < arrayElementValue.u2elementValuesCount; index++)
{
ElementValue elementValue = createElementValue();
elementValue.accept(clazz, annotation, this);
arrayElementValue.elementValues[index] = elementValue;
}
}
// Small utility methods.
private Constant createConstant()
{
int u1tag = dataInput.readUnsignedByte();
switch (u1tag)
{
case ClassConstants.CONSTANT_Integer: return new IntegerConstant();
case ClassConstants.CONSTANT_Float: return new FloatConstant();
case ClassConstants.CONSTANT_Long: return new LongConstant();
case ClassConstants.CONSTANT_Double: return new DoubleConstant();
case ClassConstants.CONSTANT_String: return new StringConstant();
case ClassConstants.CONSTANT_Utf8: return new Utf8Constant();
case ClassConstants.CONSTANT_InvokeDynamic: return new InvokeDynamicConstant();
case ClassConstants.CONSTANT_MethodHandle: return new MethodHandleConstant();
case ClassConstants.CONSTANT_Fieldref: return new FieldrefConstant();
case ClassConstants.CONSTANT_Methodref: return new MethodrefConstant();
case ClassConstants.CONSTANT_InterfaceMethodref: return new InterfaceMethodrefConstant();
case ClassConstants.CONSTANT_Class: return new ClassConstant();
case ClassConstants.CONSTANT_MethodType : return new MethodTypeConstant();
case ClassConstants.CONSTANT_NameAndType: return new NameAndTypeConstant();
default: throw new RuntimeException("Unknown constant type ["+u1tag+"] in constant pool");
}
}
private Attribute createAttribute(Clazz clazz)
{
int u2attributeNameIndex = dataInput.readUnsignedShort();
int u4attributeLength = dataInput.readInt();
String attributeName = clazz.getString(u2attributeNameIndex);
Attribute attribute =
attributeName.equals(ClassConstants.ATTR_BootstrapMethods) ? (Attribute)new BootstrapMethodsAttribute():
attributeName.equals(ClassConstants.ATTR_SourceFile) ? (Attribute)new SourceFileAttribute():
attributeName.equals(ClassConstants.ATTR_SourceDir) ? (Attribute)new SourceDirAttribute():
attributeName.equals(ClassConstants.ATTR_InnerClasses) ? (Attribute)new InnerClassesAttribute():
attributeName.equals(ClassConstants.ATTR_EnclosingMethod) ? (Attribute)new EnclosingMethodAttribute():
attributeName.equals(ClassConstants.ATTR_Deprecated) ? (Attribute)new DeprecatedAttribute():
attributeName.equals(ClassConstants.ATTR_Synthetic) ? (Attribute)new SyntheticAttribute():
attributeName.equals(ClassConstants.ATTR_Signature) ? (Attribute)new SignatureAttribute():
attributeName.equals(ClassConstants.ATTR_ConstantValue) ? (Attribute)new ConstantValueAttribute():
attributeName.equals(ClassConstants.ATTR_Exceptions) ? (Attribute)new ExceptionsAttribute():
attributeName.equals(ClassConstants.ATTR_Code) ? (Attribute)new CodeAttribute():
attributeName.equals(ClassConstants.ATTR_StackMap) ? (Attribute)new StackMapAttribute():
attributeName.equals(ClassConstants.ATTR_StackMapTable) ? (Attribute)new StackMapTableAttribute():
attributeName.equals(ClassConstants.ATTR_LineNumberTable) ? (Attribute)new LineNumberTableAttribute():
attributeName.equals(ClassConstants.ATTR_LocalVariableTable) ? (Attribute)new LocalVariableTableAttribute():
attributeName.equals(ClassConstants.ATTR_LocalVariableTypeTable) ? (Attribute)new LocalVariableTypeTableAttribute():
attributeName.equals(ClassConstants.ATTR_RuntimeVisibleAnnotations) ? (Attribute)new RuntimeVisibleAnnotationsAttribute():
attributeName.equals(ClassConstants.ATTR_RuntimeInvisibleAnnotations) ? (Attribute)new RuntimeInvisibleAnnotationsAttribute():
attributeName.equals(ClassConstants.ATTR_RuntimeVisibleParameterAnnotations) ? (Attribute)new RuntimeVisibleParameterAnnotationsAttribute():
attributeName.equals(ClassConstants.ATTR_RuntimeInvisibleParameterAnnotations) ? (Attribute)new RuntimeInvisibleParameterAnnotationsAttribute():
attributeName.equals(ClassConstants.ATTR_AnnotationDefault) ? (Attribute)new AnnotationDefaultAttribute():
(Attribute)new UnknownAttribute(u4attributeLength);
attribute.u2attributeNameIndex = u2attributeNameIndex;
return attribute;
}
private StackMapFrame createStackMapFrame()
{
int u1tag = dataInput.readUnsignedByte();
return
u1tag < StackMapFrame.SAME_ONE_FRAME ? (StackMapFrame)new SameZeroFrame(u1tag) :
u1tag < StackMapFrame.SAME_ONE_FRAME_EXTENDED ? (StackMapFrame)new SameOneFrame(u1tag) :
u1tag < StackMapFrame.LESS_ZERO_FRAME ? (StackMapFrame)new SameOneFrame(u1tag) :
u1tag < StackMapFrame.SAME_ZERO_FRAME_EXTENDED ? (StackMapFrame)new LessZeroFrame(u1tag) :
u1tag < StackMapFrame.MORE_ZERO_FRAME ? (StackMapFrame)new SameZeroFrame(u1tag) :
u1tag < StackMapFrame.FULL_FRAME ? (StackMapFrame)new MoreZeroFrame(u1tag) :
(StackMapFrame)new FullFrame();
}
private VerificationType createVerificationType()
{
int u1tag = dataInput.readUnsignedByte();
switch (u1tag)
{
case VerificationType.INTEGER_TYPE: return new IntegerType();
case VerificationType.FLOAT_TYPE: return new FloatType();
case VerificationType.LONG_TYPE: return new LongType();
case VerificationType.DOUBLE_TYPE: return new DoubleType();
case VerificationType.TOP_TYPE: return new TopType();
case VerificationType.OBJECT_TYPE: return new ObjectType();
case VerificationType.NULL_TYPE: return new NullType();
case VerificationType.UNINITIALIZED_TYPE: return new UninitializedType();
case VerificationType.UNINITIALIZED_THIS_TYPE: return new UninitializedThisType();
default: throw new RuntimeException("Unknown verification type ["+u1tag+"] in stack map frame");
}
}
private ElementValue createElementValue()
{
int u1tag = dataInput.readUnsignedByte();
switch (u1tag)
{
case ClassConstants.INTERNAL_TYPE_BOOLEAN:
case ClassConstants.INTERNAL_TYPE_BYTE:
case ClassConstants.INTERNAL_TYPE_CHAR:
case ClassConstants.INTERNAL_TYPE_SHORT:
case ClassConstants.INTERNAL_TYPE_INT:
case ClassConstants.INTERNAL_TYPE_FLOAT:
case ClassConstants.INTERNAL_TYPE_LONG:
case ClassConstants.INTERNAL_TYPE_DOUBLE:
case ClassConstants.ELEMENT_VALUE_STRING_CONSTANT: return new ConstantElementValue(u1tag);
case ClassConstants.ELEMENT_VALUE_ENUM_CONSTANT: return new EnumConstantElementValue();
case ClassConstants.ELEMENT_VALUE_CLASS: return new ClassElementValue();
case ClassConstants.ELEMENT_VALUE_ANNOTATION: return new AnnotationElementValue();
case ClassConstants.ELEMENT_VALUE_ARRAY: return new ArrayElementValue();
default: throw new IllegalArgumentException("Unknown element value tag ["+u1tag+"]");
}
}
}