qilin.util.StringNumberer Maven / Gradle / Ivy
package qilin.util;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 2002 Ondrej Lhotak
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 2.1 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
import heros.ThreadSafe;
import java.util.HashMap;
import java.util.Map;
/**
* A class that numbers strings, so they can be placed in bitsets.
*
* @author Ondrej Lhotak
*/
@ThreadSafe
public class StringNumberer extends ArrayNumberer {
private final Map stringToNumbered =
new HashMap(1024);
public synchronized NumberedString findOrAdd(String s) {
NumberedString ret = stringToNumbered.get(s);
if (ret == null) {
ret = new NumberedString(s);
stringToNumbered.put(s, ret);
add(ret);
}
return ret;
}
public NumberedString find(String s) {
return stringToNumbered.get(s);
}
}