SingleValueConstant.java

/*
 *   
 *
 * 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
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 */

// Represents a CONSTANT_Integer or CONSTANT_Float
package components;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import jcc.Const;

public
class SingleValueConstant extends ConstantObject
{
    public int value;

    private SingleValueConstant( int t, int v ){
	tag = t;
	value = v;
	nSlots = 1;
    }

    public SingleValueConstant( int ival ){
	this( Const.CONSTANT_INTEGER, ival );
    }

    public static ConstantObject read( int t, DataInput i ) throws IOException{
	return new SingleValueConstant( t, i.readInt() );
    }

    public void write( DataOutput o ) throws IOException{
	o.writeByte( tag );
	o.writeInt( value );
    }

    public String toString(){
	return (tag==Const.CONSTANT_FLOAT)? ("Float: "+Float.intBitsToFloat(value) ):
		("Int: "+Integer.toHexString( value ));
    }

    public int hashCode() {
	return tag + value;
    }

    public boolean equals(Object o) {
	if (o instanceof SingleValueConstant) {
	    SingleValueConstant s = (SingleValueConstant) o;
	    return tag == s.tag && value == s.value;
	} else {
	    return false;
	}
    }

    public boolean isResolved(){ return true; }
}