|
Java example source code file (Index.java)
The Index.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.util; import java.io.*; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; /** * An index is a transform of objects augmented with a list and a reverse lookup table * for fast lookups. * Indices are used for vocabulary in many of the natural language processing * @author Adam Gibson * */ @SuppressWarnings({"rawtypes","unchecked"}) public class Index implements Serializable { /** * */ private static final long serialVersionUID = 1160629777026141078L; Map<Integer,Object> objects = new ConcurrentHashMap<>(); Map<Object,Integer> indexes = new ConcurrentHashMap<>(); public synchronized boolean add(Object o,int idx) { if(o instanceof String) { if(o.toString().isEmpty()) throw new IllegalArgumentException("Unable to add the empty string"); } Integer index = indexes.get(o); if (index == null) { index = idx; objects.put(idx,o); indexes.put(o, index); return true; } return false; } public synchronized boolean add(Object o) { if(o instanceof String) { if(o.toString().isEmpty()) throw new IllegalArgumentException("Unable to add the empty string"); } Integer index = indexes.get(o); if (index == null) { index = objects.size(); objects.put(index,o); indexes.put(o, index); return true; } return false; } public synchronized int indexOf(Object o) { Integer index = indexes.get(o); if (index == null) { return -1; } else { return index; } } public synchronized Object get(int i) { return objects.get(i); } public int size() { return objects.size(); } @Override public String toString() { StringBuilder buff = new StringBuilder("["); int sz = objects.size(); int i; for (i = 0; i < sz; i++) { Object e = objects.get(i); buff.append(e); if (i < (sz-1)) buff.append(" , "); } buff.append("]"); return buff.toString(); } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; Index index = (Index) o; if (objects != null ? !objects.equals(index.objects) : index.objects != null) return false; return !(indexes != null ? !indexes.equals(index.indexes) : index.indexes != null); } @Override public int hashCode() { int result = objects != null ? objects.hashCode() : 0; result = 31 * result + (indexes != null ? indexes.hashCode() : 0); return result; } } Other Java examples (source code examples)Here is a short list of links related to this Java Index.java source code file: |
... this post is sponsored by my books ... | |
#1 New Release! |
FP Best Seller |
Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.
A percentage of advertising revenue from
pages under the /java/jwarehouse
URI on this website is
paid back to open source projects.