?? termfreqvector.java
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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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