content: /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.apache.solr.schema;
  
  import org.apache.lucene.search.SortField;
  import org.apache.solr.search.QParser;
  import org.apache.solr.search.function.ValueSource;
  import org.apache.solr.search.function.OrdFieldSource;
  import org.apache.lucene.analysis.Analyzer;
  import org.apache.lucene.analysis.Tokenizer;
  import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
  import org.apache.lucene.document.Fieldable;
  import org.apache.solr.response.TextResponseWriter;
  import org.apache.solr.response.XMLWriter;
  import org.apache.solr.analysis.SolrAnalyzer;
  
  import java.util.Map;
  import java.io.Reader;
  import java.io.IOException;
  /**
   * @version $Id: BoolField.java 1071480 2011-02-17 02:23:10Z hossman $
   */
  public class BoolField extends FieldType {
    @Override
    protected void init(IndexSchema schema, Map<String,String> args) {
    }
  
    @Override
    public SortField getSortField(SchemaField field,boolean reverse) {
      field.checkSortability();
      return getStringSort(field,reverse);
    }
  
    @Override
    public ValueSource getValueSource(SchemaField field, QParser qparser) {
      field.checkFieldCacheSource(qparser);
      return new OrdFieldSource(field.name);
    }
  
    // avoid instantiating every time...
    protected final static char[] TRUE_TOKEN = {'T'};
    protected final static char[] FALSE_TOKEN = {'F'};
  
    ////////////////////////////////////////////////////////////////////////
    // TODO: look into creating my own queryParser that can more efficiently
    // handle single valued non-text fields (int,bool,etc) if needed.
  
    protected final static Analyzer boolAnalyzer = new SolrAnalyzer() {
      @Override
      public TokenStreamInfo getStream(String fieldName, Reader reader) {
        Tokenizer tokenizer = new Tokenizer(reader) {
          final CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
          boolean done = false;
  
          @Override
          public void reset(Reader input) throws IOException {
            done = false;
            super.reset(input);
          }
  
          @Override
          public boolean incrementToken() throws IOException {
            clearAttributes();
            if (done) return false;
            done = true;
            int ch = input.read();
            if (ch==-1) return false;
            termAtt.copyBuffer(
                    ((ch=='t' || ch=='T' || ch=='1') ? TRUE_TOKEN : FALSE_TOKEN)
                    ,0,1);
            return true;
          }
        };
  
        return new TokenStreamInfo(tokenizer, tokenizer);
      }
    };
  
  
    @Override
    public Analyzer getAnalyzer() {
      return boolAnalyzer;
    }
  
    @Override
    public Analyzer getQueryAnalyzer() {
      return boolAnalyzer;
    }
  
    @Override
    public String toInternal(String val) {
      char ch = (val!=null && val.length()>0) ? val.charAt(0) : 0;
      return (ch=='1' || ch=='t' || ch=='T') ? "T" : "F";
    }
  
    @Override
    public String toExternal(Fieldable f) {
      return indexedToReadable(f.stringValue());
    }
  
    @Override
    public Boolean toObject(Fieldable f) {
      return Boolean.valueOf( toExternal(f) );
    }
  
    @Override
    public String indexedToReadable(String indexedForm) {
      char ch = indexedForm.charAt(0);
      return ch=='T' ? "true" : "false";
    }
  
    @Override
    public void write(XMLWriter xmlWriter, String name, Fieldable f) throws IOException {
      xmlWriter.writeBool(name, f.stringValue().charAt(0) =='T');
    }
  
    @Override
    public void write(TextResponseWriter writer, String name, Fieldable f) throws IOException {
      writer.writeBool(name, f.stringValue().charAt(0) =='T');
    }
  }
  