DefaultQueryCondition.java

/*
Name: 
    - DefaultQueryCondition

Description: 
    -  

Requires:
    - 
    
Provides:
    - 

Part of: ProcessPuzzle Framework, Domain and Business Model Ready Architecture. Provides content, workflow and social networking functionality. 
http://www.processpuzzle.com

ProcessPuzzle - Content and Workflow Management Integration Business Platform

Author(s): 
    - Zsolt Zsuffa

Copyright: (C) 2011 This program is free software: you can redistribute it and/or modify it under the terms of the 
GNU General Public License as published by the Free Software Foundation, either version 3 of the License, 
or (at your option) any later version.

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 General Public License for more details.

You should have received a copy of the GNU General Public License along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

package com.processpuzzle.persistence.query.domain;


import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;

import com.processpuzzle.commons.persistence.query.AttributeCondition;
import com.processpuzzle.commons.persistence.query.BooleanOperator;
import com.processpuzzle.commons.persistence.query.DefaultConditionElement;
import com.processpuzzle.commons.persistence.query.QueryCondition;
import com.processpuzzle.fundamental_types.domain.HashCodeUtil;

public class DefaultQueryCondition implements QueryCondition<DefaultConditionElement> {
   private Set<DefaultConditionElement> elements = new LinkedHashSet<DefaultConditionElement>();

   // Public mutators
   public void addBooleanOperator( BooleanOperator operator ) {
      elements.add( operator );
   }

   public void addAttributeCondition( AttributeCondition condition ) {
      elements.add( (DefaultConditionElement) condition );
   }

   public void addVariable( Variable variable ) {
      elements.add( variable );
   }

   // Public collection accessors
   public Iterator<DefaultConditionElement> elementsIterator() {
      return elements.iterator();
   }

   public int elementsCount() {
      return elements.size();
   }

   // Public accessors
   public boolean equals( Object objectToCheck ) {
      if( !(objectToCheck instanceof DefaultQueryCondition) )
         return false;
      DefaultQueryCondition anotherQueryCondition = (DefaultQueryCondition) objectToCheck;
      return elements.equals( anotherQueryCondition.elements );
   }

   public DefaultQueryCondition clone() {
      DefaultQueryCondition clone = new DefaultQueryCondition();
      clone.elements = new LinkedHashSet<DefaultConditionElement>();
      clone.elements.addAll( this.elements );
      return clone;
   }

   public int hashCode() {
      int result = HashCodeUtil.SEED;
      result = HashCodeUtil.hash( result, elements );
      return result;
   }
   
   public Set<DefaultConditionElement> getElements() {
      return elements;
   }
}