nz.net.ultraq.thymeleaf.internal.InMemoryMetaProvider Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of thymeleaf-layout-dialect Show documentation

Thymeleaf Layout Dialect rewritten in java.

There is a newer version: 3.2.0

Show newest version

/*
 * Copyright 2016 zhanhb.
 *
 * 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 nz.net.ultraq.thymeleaf.internal;

import java.util.LinkedHashMap;
import java.util.Map;

/**
 *
 * @author zhanhb
 */
class InMemoryMetaProvider implements MetaProvider {

    private final ConcurrentWeakIdentityHashMap> map = new ConcurrentWeakIdentityHashMap<>(200);

    @Override
    @SuppressWarnings("unchecked")
    public  T getProperty(Object object, String key) {
        return (T) getMap(object).get(key);
    }

    @Override
    public void setProperty(Object object, String key, Object value) {
        getMap(object).put(key, value);
    }

    @SuppressWarnings("NestedAssignment")
    private Map getMap(Object object) {
        Map oldValue, newValue;
        return (oldValue = map.get(object)) != null
                || (oldValue = map.putIfAbsent(object,
                        newValue = new LinkedHashMap<>(4))) != null
                        ? oldValue : newValue;
    }

}