Hibernate example source code file (FilterKey.java)

This example Hibernate source code file (FilterKey.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

filter, filterimpl, filterkey, filterkey, hashmap, io, map, map, serializable, set, set, string, string, type, typedvalue, util

The Hibernate FilterKey.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008-2011, 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.cache.spi;

import java.io.Serializable;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import org.hibernate.Filter;
import org.hibernate.engine.spi.TypedValue;
import org.hibernate.internal.FilterImpl;
import org.hibernate.type.Type;

/**
 * Allows cached queries to be keyed by enabled filters.
 * 
 * @author Gavin King
 */
public final class FilterKey implements Serializable {
	private String filterName;
	private Map<String,TypedValue> filterParameters = new HashMap();
	
	public FilterKey(String name, Map<String,?> params, Map types) {
		filterName = name;
		for ( Map.Entry<String, ?> paramEntry : params.entrySet() ) {
			Type type = types.get( paramEntry.getKey() );
			filterParameters.put( paramEntry.getKey(), new TypedValue( type, paramEntry.getValue() ) );
		}
	}
	
	public int hashCode() {
		int result = 13;
		result = 37 * result + filterName.hashCode();
		result = 37 * result + filterParameters.hashCode();
		return result;
	}
	
	public boolean equals(Object other) {
		if ( !(other instanceof FilterKey) ) return false;
		FilterKey that = (FilterKey) other;
		if ( !that.filterName.equals(filterName) ) return false;
		if ( !that.filterParameters.equals(filterParameters) ) return false;
		return true;
	}
	
	public String toString() {
		return "FilterKey[" + filterName + filterParameters + ']';
	}
	
	public static Set<FilterKey> createFilterKeys(Map enabledFilters) {
		if ( enabledFilters.size()==0 ) {
			return null;
		}
		Set<FilterKey> result = new HashSet();
		for ( Filter filter : enabledFilters.values() ) {
			FilterKey key = new FilterKey(
					filter.getName(),
					( (FilterImpl) filter ).getParameters(),
					filter.getFilterDefinition().getParameterTypes()
			);
			result.add( key );
		}
		return result;
	}
}