/* * Copyright (c) 2003, 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. */ /* ******************************************************************************* * (C) Copyright IBM Corp. 1996-2005 - All Rights Reserved                     * *                                                                             * * The original version of this source code and documentation is copyrighted   * * and owned by IBM, These materials are provided under terms of a License     * * Agreement between IBM and Sun. This technology is protected by multiple     * * US and International patents. This notice and attribution to IBM may not    * * to removed.                                                                 * ******************************************************************************* */ package sun.text.normalizer; import java.io.InputStream;import java.io.DataInputStream;import java.io.IOException;import java.util.Arrays; /** * Trie implementation which stores data in int, 32 bits. * @author synwee * @see com.ibm.icu.impl.Trie * @since release 2.1, Jan 01 2002 */public class IntTrie extends Trie{    // public constructors ---------------------------------------------     /**    * <p>Creates a new Trie with the settings for the trie data.</p>    * <p>Unserialize the 32-bit-aligned input stream and use the data for the    * trie.</p>    * @param inputStream file input stream to a ICU data file, containing    *                    the trie    * @param dataManipulate object which provides methods to parse the char    *                        data    * @throws IOException thrown when data reading fails    * @draft 2.1    */    public IntTrie(InputStream inputStream, DataManipulate datamanipulate)                                                    throws IOException    {        super(inputStream, datamanipulate);        if (!isIntTrie()) {            throw new IllegalArgumentException(                               "Data given does not belong to a int trie.");        }    }     // public methods --------------------------------------------------     /**    * Gets the value associated with the codepoint.    * If no value is associated with the codepoint, a default value will be    * returned.    * @param ch codepoint    * @return offset to data    * @draft 2.1    */    public final int getCodePointValue(int ch)    {        int offset = getCodePointOffset(ch);        return (offset >= 0) ? m_data_[offset] : m_initialValue_;    }     /**    * Gets the value to the data which this lead surrogate character points    * to.    * Returned data may contain folding offset information for the next    * trailing surrogate character.    * This method does not guarantee correct results for trail surrogates.    * @param ch lead surrogate character    * @return data value    * @draft 2.1    */    public final int getLeadValue(char ch)    {        return m_data_[getLeadOffset(ch)];    }     /**    * Get a value from a folding offset (from the value of a lead surrogate)    * and a trail surrogate.    * @param leadvalue the value of a lead surrogate that contains the    *        folding offset    * @param trail surrogate    * @return trie data value associated with the trail character    * @draft 2.1    */    public final int getTrailValue(int leadvalue, char trail)    {        if (m_dataManipulate_ == null) {            throw new NullPointerException(                             "The field DataManipulate in this Trie is null");        }        int offset = m_dataManipulate_.getFoldingOffset(leadvalue);        if (offset > 0) {            return m_data_[getRawOffset(offset,                                         (char)(trail & SURROGATE_MASK_))];        }        return m_initialValue_;    }     // protected methods -----------------------------------------------     /**    * <p>Parses the input stream and stores its trie content into a index and    * data array</p>    * @param inputStream data input stream containing trie data    * @exception IOException thrown when data reading fails    */    protected final void unserialize(InputStream inputStream)                                                    throws IOException    {        super.unserialize(inputStream);        // one used for initial value        m_data_               = new int[m_dataLength_];        DataInputStream input = new DataInputStream(inputStream);        for (int i = 0; i < m_dataLength_; i ++) {            m_data_[i] = input.readInt();        }        m_initialValue_ = m_data_[0];    }     /**    * Gets the offset to the data which the surrogate pair points to.    * @param lead lead surrogate    * @param trail trailing surrogate    * @return offset to data    * @draft 2.1    */    protected final int getSurrogateOffset(char lead, char trail)    {        if (m_dataManipulate_ == null) {            throw new NullPointerException(                             "The field DataManipulate in this Trie is null");        }        // get fold position for the next trail surrogate        int offset = m_dataManipulate_.getFoldingOffset(getLeadValue(lead));         // get the real data from the folded lead/trail units        if (offset > 0) {            return getRawOffset(offset, (char)(trail & SURROGATE_MASK_));        }         // return -1 if there is an error, in this case we return the default        // value: m_initialValue_        return -1;    }     /**    * Gets the value at the argument index.    * For use internally in TrieIterator    * @param index value at index will be retrieved    * @return 32 bit value    * @see com.ibm.icu.impl.TrieIterator    * @draft 2.1    */    protected final int getValue(int index)    {      return m_data_[index];    }     /**    * Gets the default initial value    * @return 32 bit value    * @draft 2.1    */    protected final int getInitialValue()    {        return m_initialValue_;    }     // package private methods -----------------------------------------     /**     * Internal constructor for builder use     * @param index the index array to be slotted into this trie     * @param data the data array to be slotted into this trie     * @param initialvalue the initial value for this trie     * @param options trie options to use     * @param datamanipulate folding implementation     */    IntTrie(char index[], int data[], int initialvalue, int options,            DataManipulate datamanipulate)    {        super(index, options, datamanipulate);        m_data_ = data;        m_dataLength_ = m_data_.length;        m_initialValue_ = initialvalue;    }     // private data members --------------------------------------------     /**    * Default value    */    private int m_initialValue_;    /**    * Array of char data    */    private int m_data_[];}