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 * 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,

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 *

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package com.sun.xml.internal.org.jvnet.fastinfoset.sax.helpers;

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

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

import com.sun.xml.internal.fastinfoset.algorithm.BuiltInEncodingAlgorithmFactory;

import java.io.IOException;

import java.util.Map;

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

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

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

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

import com.sun.xml.internal.org.jvnet.fastinfoset.sax.EncodingAlgorithmAttributes;

import org.xml.sax.Attributes;

/**

 * Default implementation of the {@link EncodingAlgorithmAttributes} interface.

 *

 * <p>This class provides a default implementation of the SAX2

 * {@link EncodingAlgorithmAttributes} interface, with the

 * addition of manipulators so that the list can be modified or

 * reused.</p>

 *

 * <p>There are two typical uses of this class:</p>

 *

 * <ol>

 * <li>to take a persistent snapshot of an EncodingAlgorithmAttributes object

 *  in a {@link org.xml.sax.ContentHandler#startElement startElement} event; or</li>

 * <li>to construct or modify an EncodingAlgorithmAttributes object in a SAX2

 * driver or filter.</li>

 * </ol>

 */

public class EncodingAlgorithmAttributesImpl implements EncodingAlgorithmAttributes {

    private static final int DEFAULT_CAPACITY       = 8;

    private static final int URI_OFFSET             = 0;

    private static final int LOCALNAME_OFFSET       = 1;

    private static final int QNAME_OFFSET           = 2;

    private static final int TYPE_OFFSET            = 3;

    private static final int VALUE_OFFSET           = 4;

    private static final int ALGORITHMURI_OFFSET    = 5;

    private static final int SIZE                   = 6;

    private Map _registeredEncodingAlgorithms;

    private int _length;

    private String[] _data;

    private int[] _algorithmIds;

    private Object[] _algorithmData;

    private String[] _alphabets;

    private boolean[] _toIndex;

    /**

     * Construct a new, empty EncodingAlgorithmAttributesImpl object.

     */

    public EncodingAlgorithmAttributesImpl() {

        this(null, null);

    }

    /**

     * Copy an existing Attributes object.

     *

     * <p>This constructor is especially useful inside a

     * {@link org.xml.sax.ContentHandler#startElement startElement} event.</p>

     *

     * @param attributes The existing Attributes object.

     */

    public EncodingAlgorithmAttributesImpl(Attributes attributes) {

        this(null, attributes);

    }

    /**

     * Use registered encoding algorithms and copy an existing Attributes object.

     *

     * <p>This constructor is especially useful inside a

     * {@link org.xml.sax.ContentHandler#startElement startElement} event.</p>

     *

     * @param registeredEncodingAlgorithms

     *      The registeredEncodingAlgorithms encoding algorithms.

     * @param attributes The existing Attributes object.

     */

    public EncodingAlgorithmAttributesImpl(Map registeredEncodingAlgorithms,

            Attributes attributes) {

        _data = new String[DEFAULT_CAPACITY * SIZE];

        _algorithmIds = new int[DEFAULT_CAPACITY];

        _algorithmData = new Object[DEFAULT_CAPACITY];

        _alphabets = new String[DEFAULT_CAPACITY];

        _toIndex = new boolean[DEFAULT_CAPACITY];

        _registeredEncodingAlgorithms = registeredEncodingAlgorithms;

        if (attributes != null) {

            if (attributes instanceof EncodingAlgorithmAttributes) {

                setAttributes((EncodingAlgorithmAttributes)attributes);

            } else {

                setAttributes(attributes);

            }

        }

    }

    /**

     * Clear the attribute list for reuse.

     *

     */

    public final void clear() {

        for (int i = 0; i < _length; i++) {

            _data[i * SIZE + VALUE_OFFSET] = null;

            _algorithmData[i] = null;

        }

        _length = 0;

    }

    /**

     * Add an attribute to the end of the list.

     *

     * <p>For the sake of speed, this method does no checking

     * to see if the attribute is already in the list: that is

     * the responsibility of the application.</p>

     *

     * @param URI The Namespace URI, or the empty string if

     *        none is available or Namespace processing is not

     *        being performed.

     * @param localName The local name, or the empty string if

     *        Namespace processing is not being performed.

     * @param qName The qualified (prefixed) name, or the empty string

     *        if qualified names are not available.

     * @param type The attribute type as a string.

     * @param value The attribute value.

     */

    public void addAttribute(String URI, String localName, String qName,

            String type, String value) {

        if (_length >= _algorithmData.length) {

            resize();

        }

        int i = _length * SIZE;

        _data[i++] = replaceNull(URI);

        _data[i++] = replaceNull(localName);

        _data[i++] = replaceNull(qName);

        _data[i++] = replaceNull(type);

        _data[i++] = replaceNull(value);

        _toIndex[_length] = false;

        _alphabets[_length] = null;

        _length++;

    }

    /**

     * Add an attribute to the end of the list.

     *

     * <p>For the sake of speed, this method does no checking

     * to see if the attribute is already in the list: that is

     * the responsibility of the application.</p>

     *

     * @param URI The Namespace URI, or the empty string if

     *        none is available or Namespace processing is not

     *        being performed.

     * @param localName The local name, or the empty string if

     *        Namespace processing is not being performed.

     * @param qName The qualified (prefixed) name, or the empty string

     *        if qualified names are not available.

     * @param type The attribute type as a string.

     * @param value The attribute value.

     * @param index True if attribute should be indexed.

     * @param alphabet The alphabet associated with the attribute value,

     *              may be null if there is no associated alphabet.

     */

    public void addAttribute(String URI, String localName, String qName,

            String type, String value, boolean index, String alphabet) {

        if (_length >= _algorithmData.length) {

            resize();

        }

        int i = _length * SIZE;

        _data[i++] = replaceNull(URI);

        _data[i++] = replaceNull(localName);

        _data[i++] = replaceNull(qName);

        _data[i++] = replaceNull(type);

        _data[i++] = replaceNull(value);

        _toIndex[_length] = index;

        _alphabets[_length] = alphabet;

        _length++;

    }

    /**

     * Add an attribute with built in algorithm data to the end of the list.

     *

     * <p>For the sake of speed, this method does no checking

     * to see if the attribute is already in the list: that is

     * the responsibility of the application.</p>

     *

     * @param URI The Namespace URI, or the empty string if

     *        none is available or Namespace processing is not

     *        being performed.

     * @param localName The local name, or the empty string if

     *        Namespace processing is not being performed.

     * @param qName The qualified (prefixed) name, or the empty string

     *        if qualified names are not available.

     * @param builtInAlgorithmID The built in algorithm ID.

     * @param algorithmData The built in algorithm data.

     */

    public void addAttributeWithBuiltInAlgorithmData(String URI, String localName, String qName,

            int builtInAlgorithmID, Object algorithmData) {

        if (_length >= _algorithmData.length) {

            resize();

        }

        int i = _length * SIZE;

        _data[i++] = replaceNull(URI);

        _data[i++] = replaceNull(localName);

        _data[i++] = replaceNull(qName);

        _data[i++] = "CDATA";

        _data[i++] = "";

        _data[i++] = null;

        _algorithmIds[_length] = builtInAlgorithmID;

        _algorithmData[_length] = algorithmData;

        _toIndex[_length] = false;

        _alphabets[_length] = null;

        _length++;

    }

    /**

     * Add an attribute with algorithm data to the end of the list.

     *

     * <p>For the sake of speed, this method does no checking

     * to see if the attribute is already in the list: that is

     * the responsibility of the application.</p>

     *

     * @param URI The Namespace URI, or the empty string if

     *        none is available or Namespace processing is not

     *        being performed.

     * @param localName The local name, or the empty string if

     *        Namespace processing is not being performed.

     * @param qName The qualified (prefixed) name, or the empty string

     *        if qualified names are not available.

     * @param algorithmURI The algorithm URI, or null if a built in algorithm

     * @param algorithmID The algorithm ID.

     * @param algorithmData The algorithm data.

     */

    public void addAttributeWithAlgorithmData(String URI, String localName, String qName,

            String algorithmURI, int algorithmID, Object algorithmData) {

        if (_length >= _algorithmData.length) {

            resize();

        }

        int i = _length * SIZE;

        _data[i++] = replaceNull(URI);

        _data[i++] = replaceNull(localName);

        _data[i++] = replaceNull(qName);

        _data[i++] = "CDATA";

        _data[i++] = "";

        _data[i++] = algorithmURI;

        _algorithmIds[_length] = algorithmID;

        _algorithmData[_length] = algorithmData;

        _toIndex[_length] = false;

        _alphabets[_length] = null;

        _length++;

    }

    /**

     * Replace an attribute value with algorithm data.

     *

     * <p>For the sake of speed, this method does no checking

     * to see if the attribute is already in the list: that is

     * the responsibility of the application.</p>

     *

     * @param index The index of the attribute whose value is to be replaced

     * @param algorithmURI The algorithm URI, or null if a built in algorithm

     * @param algorithmID The algorithm ID.

     * @param algorithmData The algorithm data.

     */

    public void replaceWithAttributeAlgorithmData(int index,

            String algorithmURI, int algorithmID, Object algorithmData) {

        if (index < 0 || index >= _length) return;

        int i = index * SIZE;

        _data[i + VALUE_OFFSET] = null;

        _data[i + ALGORITHMURI_OFFSET] = algorithmURI;

        _algorithmIds[index] = algorithmID;

        _algorithmData[index] = algorithmData;

        _toIndex[index] = false;

        _alphabets[index] = null;

    }

    /**

     * Copy an entire Attributes object.

     *

     * @param atts The attributes to copy.

     */

    public void setAttributes(Attributes atts) {

        _length = atts.getLength();

        if (_length > 0) {

            if (_length >= _algorithmData.length) {

                resizeNoCopy();

            }

            int index = 0;

            for (int i = 0; i < _length; i++) {

                _data[index++] = atts.getURI(i);

                _data[index++] = atts.getLocalName(i);

                _data[index++] = atts.getQName(i);

                _data[index++] = atts.getType(i);

                _data[index++] = atts.getValue(i);

                index++;

                _toIndex[i] = false;

                _alphabets[i] = null;

            }

        }

    }

    /**

     * Copy an entire EncodingAlgorithmAttributes object.

     *

     * @param atts The attributes to copy.

     */

    public void setAttributes(EncodingAlgorithmAttributes atts) {

        _length = atts.getLength();

        if (_length > 0) {

            if (_length >= _algorithmData.length) {

                resizeNoCopy();

            }

            int index = 0;

            for (int i = 0; i < _length; i++) {

                _data[index++] = atts.getURI(i);

                _data[index++] = atts.getLocalName(i);

                _data[index++] = atts.getQName(i);

                _data[index++] = atts.getType(i);

                _data[index++] = atts.getValue(i);

                _data[index++] = atts.getAlgorithmURI(i);

                _algorithmIds[i] = atts.getAlgorithmIndex(i);

                _algorithmData[i] = atts.getAlgorithmData(i);

                _toIndex[i] = false;

                _alphabets[i] = null;

            }

        }

    }

    // org.xml.sax.Attributes

    public final int getLength() {

        return _length;

    }

    public final String getLocalName(int index) {

        if (index >= 0 && index < _length) {

            return _data[index * SIZE + LOCALNAME_OFFSET];

        } else {

            return null;

        }

    }

    public final String getQName(int index) {

        if (index >= 0 && index < _length) {

            return _data[index * SIZE + QNAME_OFFSET];

        } else {

            return null;

        }

    }

    public final String getType(int index) {

        if (index >= 0 && index < _length) {

            return _data[index * SIZE + TYPE_OFFSET];

        } else {

            return null;

        }

    }

    public final String getURI(int index) {

        if (index >= 0 && index < _length) {

            return _data[index * SIZE + URI_OFFSET];

        } else {

            return null;

        }

    }

    public final String getValue(int index) {

        if (index >= 0 && index < _length) {

            final String value = _data[index * SIZE + VALUE_OFFSET];

            if (value != null) return value;

        } else {

            return null;

        }

        if (_algorithmData[index] == null || _registeredEncodingAlgorithms == null) {

            return null;

        }

        try {

            return _data[index * SIZE + VALUE_OFFSET] = convertEncodingAlgorithmDataToString(

                    _algorithmIds[index],

                    _data[index * SIZE + ALGORITHMURI_OFFSET],

                    _algorithmData[index]).toString();

        } catch (IOException e) {

            return null;

        } catch (FastInfosetException e) {

            return null;

        }

    }

    public final int getIndex(String qName) {

        for (int index = 0; index < _length; index++) {

            if (qName.equals(_data[index * SIZE + QNAME_OFFSET])) {

                return index;

            }

        }

        return -1;

    }

    public final String getType(String qName) {

        int index = getIndex(qName);

        if (index >= 0) {

            return _data[index * SIZE + TYPE_OFFSET];

        } else {

            return null;

        }

    }

    public final String getValue(String qName) {

        int index = getIndex(qName);

        if (index >= 0) {

            return getValue(index);

        } else {

            return null;

        }

    }

    public final int getIndex(String uri, String localName) {

        for (int index = 0; index < _length; index++) {

            if (localName.equals(_data[index * SIZE + LOCALNAME_OFFSET]) &&

                    uri.equals(_data[index * SIZE + URI_OFFSET])) {

                return index;

            }

        }

        return -1;

    }

    public final String getType(String uri, String localName) {

        int index = getIndex(uri, localName);

        if (index >= 0) {

            return _data[index * SIZE + TYPE_OFFSET];

        } else {

            return null;

        }

    }

    public final String getValue(String uri, String localName) {

        int index = getIndex(uri, localName);

        if (index >= 0) {

            return getValue(index);

        } else {

            return null;

        }

    }

    // EncodingAlgorithmAttributes

    public final String getAlgorithmURI(int index) {

        if (index >= 0 && index < _length) {

            return _data[index * SIZE + ALGORITHMURI_OFFSET];

        } else {

            return null;

        }

    }

    public final int getAlgorithmIndex(int index) {

        if (index >= 0 && index < _length) {

            return _algorithmIds[index];

        } else {

            return -1;

        }

    }

    public final Object getAlgorithmData(int index) {

        if (index >= 0 && index < _length) {

            return _algorithmData[index];

        } else {

            return null;

        }

    }

    // ExtendedAttributes

    public final String getAlpababet(int index) {

        if (index >= 0 && index < _length) {

            return _alphabets[index];

        } else {

            return null;

        }

    }

    public final boolean getToIndex(int index) {