alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Hibernate example source code file (FilterImpl.java)

This example Hibernate source code file (FilterImpl.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

collection, filter, filter, filterdefinition, filterimpl, hibernateexception, hibernateexception, illegalargumentexception, illegalargumentexception, io, map, object, string, string, type, util

The Hibernate FilterImpl.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
 *
 * 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.internal;
import java.io.Serializable;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.hibernate.Filter;
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.FilterDefinition;
import org.hibernate.type.Type;

/**
 * Implementation of FilterImpl.  FilterImpl implements the user's
 * view into enabled dynamic filters, allowing them to set filter parameter values.
 *
 * @author Steve Ebersole
 */
public class FilterImpl implements Filter, Serializable {
	public static final String MARKER = "$FILTER_PLACEHOLDER$";

	private transient FilterDefinition definition;
	private String filterName;
	private Map<String,Object> parameters = new HashMap();
	
	void afterDeserialize(SessionFactoryImpl factory) {
		definition = factory.getFilterDefinition(filterName);
		validate();
	}

	/**
	 * Constructs a new FilterImpl.
	 *
	 * @param configuration The filter's global configuration.
	 */
	public FilterImpl(FilterDefinition configuration) {
		this.definition = configuration;
		filterName = definition.getFilterName();
	}

	public FilterDefinition getFilterDefinition() {
		return definition;
	}

	/**
	 * Get the name of this filter.
	 *
	 * @return This filter's name.
	 */
	public String getName() {
		return definition.getFilterName();
	}
	
	public Map<String,?> getParameters() {
		return parameters;
	}

	/**
	 * Set the named parameter's value for this filter.
	 *
	 * @param name The parameter's name.
	 * @param value The value to be applied.
	 * @return This FilterImpl instance (for method chaining).
	 * @throws IllegalArgumentException Indicates that either the parameter was undefined or that the type
	 * of the passed value did not match the configured type.
	 */
	public Filter setParameter(String name, Object value) throws IllegalArgumentException {
		// Make sure this is a defined parameter and check the incoming value type
		// TODO: what should be the actual exception type here?
		Type type = definition.getParameterType( name );
		if ( type == null ) {
			throw new IllegalArgumentException( "Undefined filter parameter [" + name + "]" );
		}
		if ( value != null && !type.getReturnedClass().isAssignableFrom( value.getClass() ) ) {
			throw new IllegalArgumentException( "Incorrect type for parameter [" + name + "]" );
		}
		parameters.put( name, value );
		return this;
	}

	/**
	 * Set the named parameter's value list for this filter.  Used
	 * in conjunction with IN-style filter criteria.
	 *
	 * @param name   The parameter's name.
	 * @param values The values to be expanded into an SQL IN list.
	 * @return This FilterImpl instance (for method chaining).
	 */
	public Filter setParameterList(String name, Collection values) throws HibernateException  {
		// Make sure this is a defined parameter and check the incoming value type
		if ( values == null ) {
			throw new IllegalArgumentException( "Collection must be not null!" );
		}
		Type type = definition.getParameterType( name );
		if ( type == null ) {
			throw new HibernateException( "Undefined filter parameter [" + name + "]" );
		}
		if ( values.size() > 0 ) {
			Class elementClass = values.iterator().next().getClass();
			if ( !type.getReturnedClass().isAssignableFrom( elementClass ) ) {
				throw new HibernateException( "Incorrect type for parameter [" + name + "]" );
			}
		}
		parameters.put( name, values );
		return this;
	}

	/**
	 * Set the named parameter's value list for this filter.  Used
	 * in conjunction with IN-style filter criteria.
	 *
	 * @param name The parameter's name.
	 * @param values The values to be expanded into an SQL IN list.
	 * @return This FilterImpl instance (for method chaining).
	 */
	public Filter setParameterList(String name, Object[] values) throws IllegalArgumentException {
		return setParameterList( name, Arrays.asList( values ) );
	}

	/**
	 * Get the value of the named parameter for the current filter.
	 *
	 * @param name The name of the parameter for which to return the value.
	 * @return The value of the named parameter.
	 */
	public Object getParameter(String name) {
		return parameters.get( name );
	}

	/**
	 * Perform validation of the filter state.  This is used to verify the
	 * state of the filter after its enablement and before its use.
	 *
	 * @throws HibernateException If the state is not currently valid.
	 */
	public void validate() throws HibernateException {
		// for each of the defined parameters, make sure its value
		// has been set
		Iterator itr = definition.getParameterNames().iterator();
		while ( itr.hasNext() ) {
			final String parameterName = (String) itr.next();
			if ( parameters.get( parameterName ) == null ) {
				throw new HibernateException(
						"Filter [" + getName() + "] parameter [" + parameterName + "] value not set"
				);
			}
		}
	}
}

Other Hibernate examples (source code examples)

Here is a short list of links related to this Hibernate FilterImpl.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.