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.document.Fieldable;
  import org.apache.lucene.search.SortField;
  import org.apache.solr.response.TextResponseWriter;
  import org.apache.solr.response.XMLWriter;
  import org.apache.solr.search.function.ValueSource;
  import org.apache.solr.search.function.LongFieldSource;
  import org.apache.solr.search.QParser;
  
  import java.io.IOException;
  import java.util.Map;
  /**
   * @version $Id: LongField.java 1071480 2011-02-17 02:23:10Z hossman $
   */
  public class LongField extends FieldType {
    @Override
    protected void init(IndexSchema schema, Map<String,String> args) {
      restrictProps(SORT_MISSING_FIRST | SORT_MISSING_LAST);
    }
  
    /////////////////////////////////////////////////////////////
  
    @Override
    public SortField getSortField(SchemaField field,boolean reverse) {
      field.checkSortability();
      return new SortField(field.name,SortField.LONG, reverse);
    }
  
    @Override
    public ValueSource getValueSource(SchemaField field, QParser qparser) {
      field.checkFieldCacheSource(qparser);
      return new LongFieldSource(field.name);
    }
  
  
    @Override
    public void write(XMLWriter xmlWriter, String name, Fieldable f) throws IOException {
      xmlWriter.writeLong(name, f.stringValue());
    }
  
    @Override
    public void write(TextResponseWriter writer, String name, Fieldable f) throws IOException {
      String s = f.stringValue();
  
      // these values may be from a legacy lucene index, which may
      // not be properly formatted in some output formats, or may
      // incorrectly have a zero length.
  
      if (s.length()==0) {
        // zero length value means someone mistakenly indexed the value
        // instead of simply leaving it out.  Write a null value instead of a numeric.
        writer.writeNull(name);
        return;
      }
  
      try {
        long val = Long.parseLong(s);
        writer.writeLong(name, val);
      } catch (NumberFormatException e){
        // can't parse - write out the contents as a string so nothing is lost and
        // clients don't get a parse error.
        writer.writeStr(name, s, true);
      }
    }
  
    @Override
    public Long toObject(Fieldable f) {
      return Long.valueOf( toExternal(f) );
    }
  }
  