BaseWrapper.java

/**
 * 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.brixcms.jcr.base.wrapper;

import org.brixcms.jcr.base.action.AbstractActionHandler;

class BaseWrapper<T> {
    Integer hashCode;

    private final T delegate;
    private final SessionWrapper session;

    public BaseWrapper(T delegate, SessionWrapper session) {
        this.delegate = delegate;
        this.session = session;
    }

    public T getDelegate() {
        return delegate;
    }

    @SuppressWarnings("unchecked")
    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj instanceof BaseWrapper) {
            return false;
        }
        BaseWrapper wrapper = (BaseWrapper) obj;

        // optimization - check for hash code (if we know it)
        if (hashCode != null && wrapper.hashCode != null && hashCode != wrapper.hashCode()) {
            return false;
        } else {
            return getDelegate() == wrapper.getDelegate() || getDelegate().equals(wrapper.getDelegate());
        }
    }

    @Override
    public int hashCode() {
        return getDelegate().hashCode();
        // optimization, is it really needed? used in equals...
//		if (hashCode == null)
//		{
//			hashCode = getDelegate().hashCode();
//		}
//		return hashCode;
    }

    public AbstractActionHandler getActionHandler() {
        return getSessionWrapper().getActionHandler();
    }

    public SessionWrapper getSessionWrapper() {
        return session;
    }

    @SuppressWarnings("unchecked")
    protected <TYPE> TYPE unwrap(TYPE wrapper) {
        while (wrapper instanceof BaseWrapper) {
            wrapper = (TYPE) ((BaseWrapper) wrapper).getDelegate();
        }
        return wrapper;
    }

    public <TYPE> TYPE[] unwrap(TYPE original[], TYPE newArray[]) {
        for (int i = 0; i < original.length; ++i) {
            newArray[i] = unwrap(original[i]);
        }
        return newArray;
    }
}