/*
*
*
* Copyright 1990-2009 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* 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 version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package com.sun.satsa.jcrmic.classfile.constants;
import java.io.IOException;
import java.io.DataInputStream;
/**
* This class is the base class for all constants.
* It also defines a factory method for creating a constant based
* on the constant type
*/
abstract public class JConstant {
/**
* Constant pool entry tag.
*/
public static final int CONSTANT_UTF8 = 1;
/**
* Constant pool entry tag.
*/
public static final int CONSTANT_INTEGER = 3;
/**
* Constant pool entry tag.
*/
public static final int CONSTANT_FLOAT = 4;
/**
* Constant pool entry tag.
*/
public static final int CONSTANT_LONG = 5;
/**
* Constant pool entry tag.
*/
public static final int CONSTANT_DOUBLE = 6;
/**
* Constant pool entry tag.
*/
public static final int CONSTANT_CLASS = 7;
/**
* Constant pool entry tag.
*/
public static final int CONSTANT_STRING = 8;
/**
* Constant pool entry tag.
*/
public static final int CONSTANT_FIELDREF = 9;
/**
* Constant pool entry tag.
*/
public static final int CONSTANT_METHODREF = 10;
/**
* Constant pool entry tag.
*/
public static final int CONSTANT_INTERFACE_METHODREF = 11;
/**
* Constant pool entry tag.
*/
public static final int CONSTANT_NAME_AND_TYPE = 12;
/**
* Constant pool reference.
*/
protected JConstantPool cp;
/**
* Constructor.
* @param cp constant pool reference
*/
public JConstant(JConstantPool cp) {
this.cp = cp;
}
/**
* 'Resolved' flag.
*/
protected boolean resolved = false;
/**
* Factory method for constant pool entry creation.
* @param tag constant pool entry type tag
* @param cp constant pool reference
* @return constant pool entry object
*/
public static final JConstant create(int tag, JConstantPool cp) {
switch (tag) {
case CONSTANT_CLASS:
return new JConstantClass(cp);
case CONSTANT_UTF8:
return new JConstantUtf8(cp);
case CONSTANT_FIELDREF:
return new JConstantFieldRef(cp);
case CONSTANT_METHODREF:
return new JConstantMethodRef(cp);
case CONSTANT_INTERFACE_METHODREF:
return new JConstantInterfaceMethodRef(cp);
case CONSTANT_NAME_AND_TYPE:
return new JConstantNameAndType(cp);
case CONSTANT_STRING:
return new JConstantString(cp);
case CONSTANT_INTEGER:
return new JConstantInteger(cp);
case CONSTANT_FLOAT:
return new JConstantFloat(cp);
case CONSTANT_LONG:
return new JConstantLong(cp);
case CONSTANT_DOUBLE:
return new JConstantDouble(cp);
default:
return null;
}
}
/**
* Parses constant pool entry.
* @param dis input stream
* @throws IOException if I/O exception occurs
*/
abstract public void parse(DataInputStream dis) throws IOException;
}