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Hibernate example source code file (MetaAttributeContext.java)

This example Hibernate source code file (MetaAttributeContext.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Hibernate tags/keywords

concurrenthashmap, concurrenthashmap, hashset, iterable, iterable, metaattribute, metaattribute, metaattributecontext, metaattributecontext, threading, threads, util

The Hibernate MetaAttributeContext.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2011, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * 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 Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.metamodel.source;

import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

import org.hibernate.metamodel.binding.MetaAttribute;

/**
 * @author Steve Ebersole
 */
public class MetaAttributeContext {
	private final MetaAttributeContext parentContext;
	private final ConcurrentHashMap<String, MetaAttribute> metaAttributeMap = new ConcurrentHashMap();

	public MetaAttributeContext() {
		this( null );
	}

	public MetaAttributeContext(MetaAttributeContext parentContext) {
		this.parentContext = parentContext;
	}


	// read contract ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	public Iterable<String> getKeys() {
		HashSet<String> keys = new HashSet();
		addKeys( keys );
		return keys;
	}

	private void addKeys(Set<String> keys) {
		keys.addAll( metaAttributeMap.keySet() );
		if ( parentContext != null ) {
			// recursive call
			parentContext.addKeys( keys );
		}
	}

	public Iterable<String> getLocalKeys() {
		return metaAttributeMap.keySet();
	}

	public MetaAttribute getMetaAttribute(String key) {
		MetaAttribute value = getLocalMetaAttribute( key );
		if ( value == null ) {
			// recursive call
			value = parentContext.getMetaAttribute( key );
		}
		return value;
	}

	public MetaAttribute getLocalMetaAttribute(String key) {
		return metaAttributeMap.get( key );
	}


	// write contract ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	public void add(MetaAttribute metaAttribute) {
		metaAttributeMap.put( metaAttribute.getName(), metaAttribute );
	}

}

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