package org.apache.lucene.index;
/**
* Copyright 2004 The Apache Software Foundation
*
* Licensed 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.
*/
/** Provides access to stored term vector of
* a document field.
*/
public interface TermFreqVector {
/**
*
* @return The field this vector is associated with.
*
*/
public String getField();
/**
* @return The number of terms in the term vector.
*/
public int size();
/**
* @return An Array of term texts in ascending order.
*/
public String[] getTerms();
/** Array of term frequencies. Locations of the array correspond one to one
* to the terms in the array obtained from <code>getTerms</code>
* method. Each location in the array contains the number of times this
* term occurs in the document or the document field.
*/
public int[] getTermFrequencies();
/** Return an index in the term numbers array returned from
* <code>getTerms</code> at which the term with the specified
* <code>term</code> appears. If this term does not appear in the array,
* return -1.
*/
public int indexOf(String term);
/** Just like <code>indexOf(int)</code> but searches for a number of terms
* at the same time. Returns an array that has the same size as the number
* of terms searched for, each slot containing the result of searching for
* that term number.
*
* @param terms array containing terms to look for
* @param start index in the array where the list of terms starts
* @param len the number of terms in the list
*/
public int[] indexesOf(String[] terms, int start, int len);
}
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