org.apache.lucene.search.FieldDoc.java Source code

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Here is the source code for org.apache.lucene.search.FieldDoc.java

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/*
 * 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;

import java.util.Arrays;

/**
 * Expert: A ScoreDoc which also contains information about
 * how to sort the referenced document.  In addition to the
 * document number and score, this object contains an array
 * of values for the document from the field(s) used to sort.
 * For example, if the sort criteria was to sort by fields
 * "a", "b" then "c", the <code>fields</code> object array
 * will have three elements, corresponding respectively to
 * the term values for the document in fields "a", "b" and "c".
 * The class of each element in the array will be either
 * Integer, Float or String depending on the type of values
 * in the terms of each field.
 *
 * <p>Created: Feb 11, 2004 1:23:38 PM
 *
 * @since   lucene 1.4
 * @see ScoreDoc
 * @see TopFieldDocs
 */
public class FieldDoc extends ScoreDoc {

    /** Expert: The values which are used to sort the referenced document.
     * The order of these will match the original sort criteria given by a
     * Sort object.  Each Object will have been returned from
     * the <code>value</code> method corresponding
     * FieldComparator used to sort this field.
     * @see Sort
     * @see IndexSearcher#search(Query,int,Sort)
     */
    public Object[] fields;

    /** Expert: Creates one of these objects with empty sort information. */
    public FieldDoc(int doc, float score) {
        super(doc, score);
    }

    /** Expert: Creates one of these objects with the given sort information. */
    public FieldDoc(int doc, float score, Object[] fields) {
        super(doc, score);
        this.fields = fields;
    }

    /** Expert: Creates one of these objects with the given sort information. */
    public FieldDoc(int doc, float score, Object[] fields, int shardIndex) {
        super(doc, score, shardIndex);
        this.fields = fields;
    }

    // A convenience method for debugging.
    @Override
    public String toString() {
        // super.toString returns the doc and score information, so just add the
        // fields information
        StringBuilder sb = new StringBuilder(super.toString());
        sb.append(" fields=");
        sb.append(Arrays.toString(fields));
        return sb.toString();
    }
}