/*
 * 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.lucene.search.vectorhighlight;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.apache.lucene.search.vectorhighlight.FieldFragList.WeightedFragInfo;
import org.apache.lucene.search.vectorhighlight.FieldPhraseList.WeightedPhraseInfo;

An implementation class of FragListBuilder that generates one WeightedFragInfo object. Typical use case of this class is that you can get an entire field contents by using both of this class and SimpleFragmentsBuilder.

FastVectorHighlighter h = new FastVectorHighlighter( true, true,
  new SingleFragListBuilder(), new SimpleFragmentsBuilder() );

/**
 * An implementation class of {@link FragListBuilder} that generates one {@link WeightedFragInfo} object.
 * Typical use case of this class is that you can get an entire field contents
 * by using both of this class and {@link SimpleFragmentsBuilder}.<br>
 * <pre class="prettyprint">
 * FastVectorHighlighter h = new FastVectorHighlighter( true, true,
 *   new SingleFragListBuilder(), new SimpleFragmentsBuilder() );
 * </pre>
 */
public class SingleFragListBuilder implements FragListBuilder {

  @Override
  public FieldFragList createFieldFragList(FieldPhraseList fieldPhraseList,
      int fragCharSize) {

    FieldFragList ffl = new SimpleFieldFragList( fragCharSize );

    List<WeightedPhraseInfo> wpil = new ArrayList<>();
    Iterator<WeightedPhraseInfo> ite = fieldPhraseList.phraseList.iterator();
    WeightedPhraseInfo phraseInfo = null;
    while( true ){
      if( !ite.hasNext() ) break;
      phraseInfo = ite.next();
      if( phraseInfo == null ) break;

      wpil.add( phraseInfo );
    }
    if( wpil.size() > 0 )
      ffl.add( 0, Integer.MAX_VALUE, wpil );
    return ffl;
  }

}