constantfieldrefinfo.java

Java Bytecode Editor 是一个 JAVA 的字节码反汇编和修改器。它可以很方便的修改已经编译成 Class 文件的 JAVA 文件。

/*
    This library 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.
*/

package org.gjt.jclasslib.structures.constants;

import org.gjt.jclasslib.structures.InvalidByteCodeException;

import java.io.*;

/**
    Describes a <tt>CONSTANT_Fieldref_info</tt> constant pool data structure.

    @author <a href="mailto:[e-mail]">Ingo Kegel</a>
    @version $Revision: 1.2 $ $Date: 2005/12/18 21:28:58 $
*/
public class ConstantFieldrefInfo extends ConstantReference {
    
    public byte getTag() {
        return CONSTANT_FIELDREF;
    }

    public String getTagVerbose() {
        return CONSTANT_FIELDREF_VERBOSE;
    }

    public void read(DataInput in)
        throws InvalidByteCodeException, IOException {
        
        super.read(in);
        if (debug) debug("read ");
    }

    public String getVerbose() throws InvalidByteCodeException {

        ConstantNameAndTypeInfo nameAndType = getNameAndTypeInfo();

        return classFile.getConstantPoolEntryName(classIndex) + "/" +
               classFile.getConstantPoolEntryName(nameAndType.getNameIndex())+ " "+
               classFile.getConstantPoolEntryName(nameAndType.getDescriptorIndex());
    }    
    
    public void write(DataOutput out)
        throws InvalidByteCodeException, IOException {
        
        out.writeByte(CONSTANT_FIELDREF);
        super.write(out);
        if (debug) debug("wrote ");
    }
    
    protected void debug(String message) {
        super.debug(message + getTagVerbose() + " with class_index " + classIndex +
              " and name_and_type_index " + nameAndTypeIndex);
    }

}