/**

  * Copyright 2005-2011 The Kuali Foundation

  *

  * Licensed under the Educational Community License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  * http://www.opensource.org/licenses/ecl2.php

  *

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.kuali.rice.core.api.search;

 import java.util.Arrays;

 import java.util.Collection;

 import java.util.Collections;

 /**

  * This class contains a static list of search operators used in rice.

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public enum SearchOperator {

         AND("&&"),

         OR("|"),

         NOT("!"),

         BETWEEN(".."),

     BETWEEN_EXCLUSIVE_UPPER("..."),

         NULL("NULL"), 

         NOT_NULL("!NULL"),

         LIKE_ONE("?"),

         LIKE_MANY("*"),

         LIKE_MANY_P("%"),

         GREATER_THAN(">"),

         LESS_THAN("<"),

         EQUAL("="),

         GREATER_THAN_EQUAL(">="),

         LESS_THAN_EQUAL("<=");

         private final String op;

         private SearchOperator(String op) {

                 this.op = op;

         }

         public static final Collection<SearchOperator> QUERY_CHARACTERS =

                 Collections.unmodifiableCollection(Arrays.asList(LIKE_MANY, LIKE_ONE, LIKE_MANY_P, GREATER_THAN, LESS_THAN, BETWEEN, BETWEEN_EXCLUSIVE_UPPER, OR, NOT, EQUAL));

         public static final Collection<SearchOperator> RANGE_CHARACTERS =

                 Collections.unmodifiableCollection(Arrays.asList(GREATER_THAN_EQUAL, LESS_THAN_EQUAL, GREATER_THAN, LESS_THAN, BETWEEN, BETWEEN_EXCLUSIVE_UPPER));

         public String op() {

                 return op;

         }

         @Override

         public String toString() {

                 return op;

         }

 }