[hibernate-issues] [Hibernate-JIRA] Created: (HSEARCH-1113) ExcludeFalse Capability Query by Example Example

[Uday Kari (JIRA)]

ExcludeFalse Capability Query by Example Example
------------------------------------------------

                 Key: HSEARCH-1113
                 URL: https://hibernate.onjira.com/browse/HSEARCH-1113
             Project: Hibernate Search
          Issue Type: Improvement
          Components: engine
    Affects Versions: 4.1.0.Final
         Environment: all
            Reporter: Uday Kari
            Priority: Minor


In web form development, checkboxes are mapped to booleans properties.  When using a form to conduct Query By Example, the results should exclude un-checked or false properties. I have already fixed this for my application, here is the code...you are welcome to use it.  

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2010, 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.criterion;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.hibernate.Criteria;
import org.hibernate.EntityMode;
import org.hibernate.HibernateException;
import org.hibernate.engine.TypedValue;
import org.hibernate.persister.entity.EntityPersister;
import org.hibernate.type.CompositeType;
import org.hibernate.type.Type;
import org.hibernate.util.StringHelper;

/**
 * Support for query by example.
 * <pre>
 * List results = session.createCriteria(Parent.class)
 *     .add( Example.create(parent).ignoreCase() )
 *     .createCriteria("child")
 *         .add( Example.create( parent.getChild() ) )
 *     .list();
 * </pre>
 * "Examples" may be mixed and matched with "Expressions" in the same <tt>Criteria</tt>.
 * @see org.hibernate.Criteria
 * @author Gavin King
 */

public class Example implements Criterion {

	private final Object entity;
	private final Set excludedProperties = new HashSet();
	private PropertySelector selector;
	private boolean isLikeEnabled;
	private Character escapeCharacter;
	private boolean isIgnoreCaseEnabled;
	private MatchMode matchMode;

	/**
	 * A strategy for choosing property values for inclusion in the query
	 * criteria
	 */

	public static interface PropertySelector extends Serializable {
		public boolean include(Object propertyValue, String propertyName, Type type);
	}

	private static final PropertySelector NOT_NULL = new NotNullPropertySelector();
	private static final PropertySelector ALL = new AllPropertySelector();
	private static final PropertySelector NOT_NULL_OR_ZERO = new NotNullOrZeroPropertySelector();
	
	////////////////////////////////////////////////////////////
	//  Uday Edits 
	//
	private static final PropertySelector NOT_FALSE = new NotFalsePropertySelector();
	
	 static final class NotFalsePropertySelector implements PropertySelector 
	  {
	    public boolean include(Object object, String propertyName, Type type) 
	    {
	      if (object == null)
	      {
	        return false;
	      }
	      else if (object instanceof Boolean)
	      {
	        return ((Boolean) object).booleanValue();
	      }
	      else
	      {
	        return true;
	      }
	    }
	  }

	 /**
	   * Exclude false-valued properties
	   */
	  public Example excludeFalse() {
	    setPropertySelector(NOT_FALSE);
	    return this;
	  }

	 //
	 //  End 
	 /////////////////////////////////////////
	  
 
[...]


--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira