/*
* The MIT License
*
* Copyright 2014 Karol Bucek.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package arjdbc.util;
import java.util.WeakHashMap;
import org.jruby.Ruby;
import org.jruby.RubyString;
import org.jruby.runtime.ThreadContext;
import org.jruby.util.ByteList;
/**
* Cache of _unicode_ strings.
*
* @author kares
*/
public final class StringCache {
final WeakHashMap<String, ByteList> cache = new WeakHashMap<String, ByteList>(64);
public RubyString get(final ThreadContext context, final String key) {
final ByteList bytes = cache.get(key);
if ( bytes == null ) return store(context, key);
final Ruby runtime = context.runtime;
return (RubyString) RubyString.newString(runtime, bytes).freeze(context);
}
private RubyString store(final ThreadContext context, final String key) {
final Ruby runtime = context.runtime;
final RubyString str = RubyString.newUnicodeString(runtime, key);
synchronized (cache) { cache.put(key, str.getByteList()); }
return (RubyString) str.freeze(context);
}
public void clear() {
cache.clear();
}
}