/*

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

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 * 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,

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package com.sun.xml.internal.fastinfoset.algorithm;

import java.util.ArrayList;

import java.util.List;

import java.nio.CharBuffer;

import com.sun.xml.internal.org.jvnet.fastinfoset.EncodingAlgorithmException;

import com.sun.xml.internal.fastinfoset.CommonResourceBundle;

public class UUIDEncodingAlgorithm extends LongEncodingAlgorithm {

    public final int getPrimtiveLengthFromOctetLength(int octetLength) throws EncodingAlgorithmException {

        if (octetLength % (LONG_SIZE * 2) != 0) {

            throw new EncodingAlgorithmException(CommonResourceBundle.getInstance().

                    getString("message.lengthNotMultipleOfUUID",new Object[]{Integer.valueOf(LONG_SIZE * 2)}));

        }

        return octetLength / LONG_SIZE;

    }

    public final Object convertFromCharacters(char[] ch, int start, int length) {

        final CharBuffer cb = CharBuffer.wrap(ch, start, length);

        final List longList = new ArrayList();

        matchWhiteSpaceDelimnatedWords(cb,

                new WordListener() {

            public void word(int start, int end) {

                String uuidValue = cb.subSequence(start, end).toString();

                fromUUIDString(uuidValue);

                longList.add(Long.valueOf(_msb));

                longList.add(Long.valueOf(_lsb));

            }

        }

        );

        return generateArrayFromList(longList);

    }

    public final void convertToCharacters(Object data, StringBuffer s) {

        if (!(data instanceof long[])) {

            throw new IllegalArgumentException(CommonResourceBundle.getInstance().getString("message.dataNotLongArray"));

        }

        final long[] ldata = (long[])data;

        final int end = ldata.length - 2;

        for (int i = 0; i <= end; i += 2) {

            s.append(toUUIDString(ldata[i], ldata[i + 1]));

            if (i != end) {

                s.append(' ');

            }

        }

    }

    private long _msb;

    private long _lsb;

    final void fromUUIDString(String name) {

        String[] components = name.split("-");

        if (components.length != 5)

            throw new IllegalArgumentException(CommonResourceBundle.getInstance().

                    getString("message.invalidUUID", new Object[]{name}));

        for (int i=0; i<5; i++)

            components[i] = "0x"+components[i];

        _msb = Long.parseLong(components[0], 16);

        _msb <<= 16;

        _msb |= Long.parseLong(components[1], 16);

        _msb <<= 16;

        _msb |= Long.parseLong(components[2], 16);

        _lsb = Long.parseLong(components[3], 16);

        _lsb <<= 48;

        _lsb |= Long.parseLong(components[4], 16);

    }

    final String toUUIDString(long msb, long lsb) {

        return (digits(msb >> 32, 8) + "-" +

                digits(msb >> 16, 4) + "-" +

                digits(msb, 4) + "-" +

                digits(lsb >> 48, 4) + "-" +

                digits(lsb, 12));

    }

    final String digits(long val, int digits) {

        long hi = 1L << (digits * 4);

        return Long.toHexString(hi | (val & (hi - 1))).substring(1);

    }

}