content: package org.apache.lucene.search.spans;
  
  /**
   * 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.
   */
  
  import org.apache.lucene.index.IndexReader;
  import org.apache.lucene.index.Term;
  import org.apache.lucene.util.ToStringUtils;
  
  import java.io.IOException;
  import java.util.Set;
  
  /** Matches spans containing a term. */
  public class SpanTermQuery extends SpanQuery {
    protected Term term;
  
    /** Construct a SpanTermQuery matching the named term's spans. */
    public SpanTermQuery(Term term) { this.term = term; }
  
    /** Return the term whose spans are matched. */
    public Term getTerm() { return term; }
  
    @Override
    public String getField() { return term.field(); }
    
    @Override
    public void extractTerms(Set<Term> terms) {
  	  terms.add(term);
    }
  
    @Override
    public String toString(String field) {
      StringBuilder buffer = new StringBuilder();
      if (term.field().equals(field))
        buffer.append(term.text());
      else
        buffer.append(term.toString());
      buffer.append(ToStringUtils.boost(getBoost()));
      return buffer.toString();
    }
  
    @Override
    public int hashCode() {
      final int prime = 31;
      int result = super.hashCode();
      result = prime * result + ((term == null) ? 0 : term.hashCode());
      return result;
    }
  
    @Override
    public boolean equals(Object obj) {
      if (this == obj)
        return true;
      if (!super.equals(obj))
        return false;
      if (getClass() != obj.getClass())
        return false;
      SpanTermQuery other = (SpanTermQuery) obj;
      if (term == null) {
        if (other.term != null)
          return false;
      } else if (!term.equals(other.term))
        return false;
      return true;
    }
  
    @Override
    public Spans getSpans(final IndexReader reader) throws IOException {
      return new TermSpans(reader.termPositions(term), term);
    }
  
  }
  