001/*
002 * Copyright (c) 2007-2011, Regents of the University of Colorado 
003 * All rights reserved.
004 * 
005 * Redistribution and use in source and binary forms, with or without
006 * modification, are permitted provided that the following conditions are met:
007 * 
008 * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 
009 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 
010 * Neither the name of the University of Colorado at Boulder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. 
011 * 
012 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
013 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
014 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
015 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
016 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
017 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
018 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
019 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
020 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
021 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
022 * POSSIBILITY OF SUCH DAMAGE. 
023 */
024package org.cleartk.util.collection;
025
026import java.io.BufferedReader;
027import java.io.BufferedWriter;
028import java.io.IOException;
029import java.io.PrintWriter;
030import java.io.Reader;
031import java.io.Serializable;
032import java.io.Writer;
033import java.util.ArrayList;
034import java.util.Collections;
035import java.util.List;
036import java.util.Map;
037import java.util.Set;
038
039import org.cleartk.util.BaseConversion;
040
041import com.google.common.collect.BiMap;
042import com.google.common.collect.ForwardingMap;
043import com.google.common.collect.HashBiMap;
044
045/**
046 * <br>
047 * Copyright (c) 2007-2011, Regents of the University of Colorado <br>
048 * All rights reserved.
049 * 
050 * <p>
051 * 
052 * @author Philip
053 * 
054 */
055public class CompressedStringBiMap extends ForwardingMap<String, String> implements
056    GenKeyBiMap<String, String>, Serializable {
057
058  private static final long serialVersionUID = 5362169827584657941L;
059
060  private HashBiMap<String, String> delegate;
061
062  private int count;
063
064  public CompressedStringBiMap() {
065    this.delegate = HashBiMap.create();
066    this.count = 0;
067  }
068
069  @Override
070  public String getOrGenerateKey(String value) {
071    if (this.containsValue(value))
072      return this.inverse().get(value);
073
074    synchronized (this) {
075      String key = BaseConversion.convertBase(this.count, 62);
076      this.put(key, value);
077      return key;
078    }
079  }
080
081  @Override
082  public String put(String key, String value) {
083    this.count++;
084    return this.delegate.put(key, value);
085  }
086
087  @Override
088  public String forcePut(String key, String value) {
089    return this.delegate.forcePut(key, value);
090  }
091
092  @Override
093  public void putAll(Map<? extends String, ? extends String> map) {
094    this.standardPutAll(map);
095  }
096
097  @Override
098  public BiMap<String, String> inverse() {
099    return this.delegate.inverse();
100  }
101
102  @Override
103  protected Map<String, String> delegate() {
104    return this.delegate;
105  }
106
107  @Override
108  public Set<String> values() {
109    return this.delegate.values();
110  }
111
112  public void read(Reader reader) throws IOException {
113    clear();
114
115    BufferedReader input = new BufferedReader(reader);
116
117    String line = input.readLine();
118
119    if (line == null)
120      return;
121
122    int tempcount = Integer.parseInt(line);
123
124    while ((line = input.readLine()) != null) {
125      int tabLocation = line.lastIndexOf('\t');
126      String value = line.substring(0, tabLocation);
127      String key = line.substring(tabLocation + 1);
128      put(key, value);
129    }
130
131    count = tempcount;
132    input.close();
133
134  }
135
136  public void write(Writer writer) {
137    write(writer, false);
138  }
139
140  public void write(Writer writer, boolean sortOutput) {
141    PrintWriter out = new PrintWriter(new BufferedWriter(writer));
142    out.println(count);
143    if (sortOutput) {
144      List<String> lookupList = new ArrayList<String>();
145      for (Map.Entry<String, String> entry : entrySet()) {
146        lookupList.add(String.format("%s\t%s", entry.getValue(), entry.getKey()));
147      }
148      Collections.sort(lookupList);
149
150      // write the sorted key value pairs
151      for (String lookupString : lookupList) {
152        out.println(lookupString);
153      }
154    } else {
155      for (Map.Entry<String, String> entry : entrySet()) {
156        out.println(String.format("%s\t%s", entry.getValue(), entry.getKey()));
157      }
158    }
159    out.close();
160  }
161}