/*
 * Copyright 1999-2005 The Apache Software Foundation.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */
/*
 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
 */
/*
 * $Id: SignerOutputStream.java,v 1.2 2005/09/15 14:29:02 mullan Exp $
 */
package org.jcp.xml.dsig.internal;

import java.io.ByteArrayOutputStream;
import java.security.Signature;
import java.security.SignatureException;

/**
 * Derived from Apache sources and changed to use java.security.Signature 
 * objects as input instead of org.apache.xml.security.algorithms.SignatureAlgorithm
 * objects.
 *
 * @author raul
 * @author Sean Mullan
 */
public class SignerOutputStream extends ByteArrayOutputStream {
    private final Signature sig;

    public SignerOutputStream(Signature sig) {
        this.sig=sig;       
    }

    /** @inheritDoc */
    public void write(byte[] arg0)  {
	super.write(arg0, 0, arg0.length);
        try {
	    sig.update(arg0);
	} catch (SignatureException e) {
            throw new RuntimeException(""+e);
	}
    }
    
    /** @inheritDoc */
    public void write(int arg0) {
	super.write(arg0);
        try {
            sig.update((byte)arg0);
        } catch (SignatureException e) {
            throw new RuntimeException(""+e);
        }
    }
    
    /** @inheritDoc */
    public void write(byte[] arg0, int arg1, int arg2) {
	super.write(arg0, arg1, arg2);
        try {
            sig.update(arg0,arg1,arg2);
        } catch (SignatureException e) {
            throw new RuntimeException(""+e);
        }
    }
}
