/*

 * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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 in the LICENSE file that

 * accompanied this code).

 *

 * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.awt;

import java.nio.CharBuffer;

import java.nio.ByteBuffer;

import java.nio.charset.*;

//This class delegates all invokes to the charset "javaCs" if

//its subclasses do not provide their own en/decode solution.

public class AWTCharset extends Charset {

    protected Charset awtCs;

    protected Charset javaCs;

    public AWTCharset(String awtCsName, Charset javaCs) {

        super(awtCsName, null);

        this.javaCs = javaCs;

        this.awtCs = this;

    }

    public boolean contains(Charset cs) {

        if (javaCs == null) return false;

        return javaCs.contains(cs);

    }

    public CharsetEncoder newEncoder() {

        if (javaCs == null)

            throw new Error("Encoder is not supported by this Charset");

        return new Encoder(javaCs.newEncoder());

    }

    public CharsetDecoder newDecoder() {

        if (javaCs == null)

            throw new Error("Decoder is not supported by this Charset");

        return new Decoder(javaCs.newDecoder());

    }

    public class Encoder extends CharsetEncoder {

        protected CharsetEncoder enc;

        protected Encoder () {

            this(javaCs.newEncoder());

        }

        protected Encoder (CharsetEncoder enc) {

            super(awtCs,

                  enc.averageBytesPerChar(),

                  enc.maxBytesPerChar());

            this.enc = enc;

        }

        public boolean canEncode(char c) {

            return enc.canEncode(c);

        }

        public boolean canEncode(CharSequence cs) {

            return enc.canEncode(cs);

        }

        protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) {

            return enc.encode(src, dst, true);

        }

        protected CoderResult implFlush(ByteBuffer out) {

            return enc.flush(out);

        }

        protected void implReset() {

            enc.reset();

        }

        protected void implReplaceWith(byte[] newReplacement) {

            if (enc != null)

                enc.replaceWith(newReplacement);

        }

        protected void implOnMalformedInput(CodingErrorAction newAction) {

            enc.onMalformedInput(newAction);

        }

        protected void implOnUnmappableCharacter(CodingErrorAction newAction) {

            enc.onUnmappableCharacter(newAction);

        }

        public boolean isLegalReplacement(byte[] repl) {

            return true;

        }

    }

    public class Decoder extends CharsetDecoder {

        protected CharsetDecoder dec;

        private String nr;

        protected Decoder () {

            this(javaCs.newDecoder());

        }

        protected Decoder (CharsetDecoder dec) {

            super(awtCs,

                  dec.averageCharsPerByte(),

                  dec.maxCharsPerByte());

            this.dec = dec;

        }

        protected CoderResult decodeLoop(ByteBuffer src, CharBuffer dst) {

            return dec.decode(src, dst, true);

        }

        ByteBuffer fbb = ByteBuffer.allocate(0);

        protected CoderResult implFlush(CharBuffer out) {

            dec.decode(fbb, out, true);

            return dec.flush(out);

        }

        protected void implReset() {

            dec.reset();

        }

        protected void implReplaceWith(String newReplacement) {

            if (dec != null)

                dec.replaceWith(newReplacement);

        }

        protected void implOnMalformedInput(CodingErrorAction newAction) {

            dec.onMalformedInput(newAction);

        }

        protected void implOnUnmappableCharacter(CodingErrorAction newAction) {

            dec.onUnmappableCharacter(newAction);

        }

    }

}