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Java example source code file (NGramTokenizer.java)
The NGramTokenizer.java Java example source code/* * * * Copyright 2015 Skymind,Inc. * * * * 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. * */ package org.deeplearning4j.text.tokenization.tokenizer; import org.apache.commons.lang3.StringUtils; import java.util.ArrayList; import java.util.List; /** * @author sonali */ public class NGramTokenizer implements Tokenizer { private List<String> tokens; private List<String> originalTokens; private int index; private TokenPreProcess preProcess; private Tokenizer tokenizer; public NGramTokenizer(Tokenizer tokenizer,Integer minN, Integer maxN) { this.tokens = new ArrayList<>(); while (tokenizer.hasMoreTokens()) { String nextToken = tokenizer.nextToken(); this.tokens.add(nextToken); } if (maxN != 1) { this.originalTokens = this.tokens; this.tokens = new ArrayList<String>(); Integer nOriginalTokens = this.originalTokens.size(); Integer min = Math.min(maxN + 1, nOriginalTokens + 1); for (int i = minN; i < min; i++) { for (int j = 0; j < nOriginalTokens - i + 1; j++) { List<String> originalTokensSlice = this.originalTokens.subList(j, j+ i); this.tokens.add(StringUtils.join(" ", originalTokensSlice)); } } } } @Override public boolean hasMoreTokens() { return index < tokens.size(); } @Override public int countTokens() { return tokens.size(); } @Override public String nextToken() { String ret = tokens.get(index); index++; return ret; } @Override public List<String> getTokens() { List<String> tokens = new ArrayList<>(); while(hasMoreTokens()) { tokens.add(nextToken()); } return tokens; } @Override public void setTokenPreProcessor(TokenPreProcess tokenPreProcessor) { this.preProcess = tokenPreProcessor; } } Other Java examples (source code examples)Here is a short list of links related to this Java NGramTokenizer.java source code file: |
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