org.canova.api.util.Index Maven / Gradle / Ivy
/*
*
* *
* * * 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.canova.api.util;
import java.io.*;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* An index is a applyTransformToDestination 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 objects = new ConcurrentHashMap<>();
Map indexes = new ConcurrentHashMap<>();
public synchronized boolean add(Object o,int idx) {
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) {
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();
}
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();
}
}