/
PjbDumper.java
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/
PjbDumper.java
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package org.isk.jvmhardcore.pjba.dumper;
import org.isk.jvmhardcore.pjba.instruction.meta.MetaInstruction;
import org.isk.jvmhardcore.pjba.instruction.meta.MetaInstruction.ArgsType;
import org.isk.jvmhardcore.pjba.instruction.meta.MetaInstructions;
import org.isk.jvmhardcore.pjba.structure.ClassFile;
import org.isk.jvmhardcore.pjba.structure.Constant;
import org.isk.jvmhardcore.pjba.util.BytecodeUtils;
import org.isk.jvmhardcore.pjba.visitor.Visitor;
public class PjbDumper implements Visitor {
final private ClassFile classFile;
final private StringBuilder pjb;
private int methodCount;
public PjbDumper(ClassFile classFile) {
super();
this.classFile = classFile;
this.pjb = new StringBuilder();
}
public String dump() {
this.classFile.accept(this);
this.pjb.append(" .methodend\n");
this.pjb.append(".classend");
return this.pjb.toString();
}
@Override
public void visitMagicNumber(int magicNumber) {
pjb.append(".class ");
}
@Override
public void visitVersion(int version) {
// Do nothing
}
@Override
public void visitConstantPoolSize(int size) {
// Do nothing
}
@Override
public void visitClassAccessFlags(int accessFlags) {
this.pjb.append(StringValues.getClassModifiers(accessFlags));
}
@Override
public void visitThisClass(int thisClass) {
final Constant.Class constantClass = (Constant.Class) this.classFile.getConstant(thisClass);
final Constant.UTF8 constantUtf8 = (Constant.UTF8) this.classFile.getConstant(constantClass.nameIndex);
this.pjb.append(constantUtf8.value).append("\n");
}
@Override
public void visitSuperClass(int superClass) {
// Do nothing
}
@Override
public void visitInterfacesSize(int length) {
// Do nothing
}
@Override
public void visitFieldsSize(int size) {
// Do nothing
}
@Override
public void visitMethodsSize(int size) {
// Do nothing
}
@Override
public void visitClassAttributeSize(int size) {
// Do nothing
}
@Override
public void visitConstantTag(int tag) {
// Do nothing
}
@Override
public void visitConstantUTF8(String value) {
// Do nothing
}
@Override
public void visitConstantInteger(int integer) {
// Do nothing
}
@Override
public void visitConstantFloat(float floatValue) {
// Do nothing
}
@Override
public void visitConstantLong(long longValue) {
// Do nothing
}
@Override
public void visitConstantDouble(double doubleValue) {
// Do nothing
}
@Override
public void visitConstantClass(int utf8Index) {
// Do nothing
}
@Override
public void visitConstantString(int utf8Index) {
// Do nothing
}
@Override
public void visitMethodAccessFlags(int accessFlags) {
if (this.methodCount > 0) {
this.pjb.append(" .methodend\n\n");
}
this.pjb.append(" .method ").append(StringValues.getMethodModifiers(accessFlags));
this.methodCount++;
}
@Override
public void visitMethodNameIndex(int nameIndex) {
final Constant.UTF8 constantUtf8 = (Constant.UTF8) this.classFile.getConstant(nameIndex);
this.pjb.append(constantUtf8.value);
}
@Override
public void visitMethodDescriptorIndex(int descriptorIndex) {
final Constant.UTF8 constantUtf8 = (Constant.UTF8) this.classFile.getConstant(descriptorIndex);
this.pjb.append(constantUtf8.value).append("\n");
}
@Override
public void visitMethodAttributesSize(int size) {
// Do nothing
}
@Override
public void visitAttributeNameIndex(int nameIndex) {
// Do nothing
}
@Override
public void visitAttributeLength(int length) {
// Do nothing
}
@Override
public void visitCodeMaxStack(int maxStack) {
// Do nothing
}
@Override
public void visitCodeMaxLocals(int maxLocals) {
// Do nothing
}
@Override
public void visitCodeLength(int codeLength) {
// Do nothing
}
@Override
public void visitCodeExceptionsSize(int size) {
// Do nothing
}
@Override
public void visitCodeAttributesSize(int size) {
// Do nothing
}
private MetaInstruction metaInstruction;
@Override
public void visitOpcode(int opcode) {
this.metaInstruction = MetaInstructions.getMetaInstruction(opcode);
this.pjb.append(" ").append(this.metaInstruction.getPjbMnemonic());
if (this.metaInstruction.getArgsType() == ArgsType.NONE) {
this.pjb.append("\n");
}
}
@Override
public void visitInstructionByte(int value) {
Object printableValue = null;
final ArgsType type = this.metaInstruction.getArgsType();
switch (type) {
case BYTE_VALUE:
printableValue = value;
break;
case IFS_CONSTANT:
printableValue = StringValues.getPrintableConstant(BytecodeUtils.unsign((byte) value), this.classFile);
break;
default:
throw new RuntimeException("Incorrect type: " + type + " for the value: " + value);
}
this.pjb.append(" ").append(printableValue).append("\n");
}
@Override
public void visitInstructionShort(int value) {
Object printableValue = null;
final ArgsType type = this.metaInstruction.getArgsType();
switch (type) {
case SHORT_VALUE:
printableValue = value;
break;
case W_IFS_CONSTANT:
case LD_CONSTANT:
printableValue = StringValues.getPrintableConstant(BytecodeUtils.unsign((short) value), this.classFile);
break;
default:
throw new RuntimeException("Incorrect type: " + type + " for the value: " + value);
}
this.pjb.append(" ").append(printableValue).append("\n");
}
}