/**
* Copyright 2010-2016 Ralph Schaer <ralphschaer@gmail.com>
*
* Licensed under the Apache 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.apache.org/licenses/LICENSE-2.0
*
* 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 ch.ralscha.extdirectspring.filter;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
public enum Comparison {
LESS_THAN("lt", "<"), LESS_THAN_OR_EQUAL("lte", "<="), GREATER_THAN("gt", ">"),
GREATER_THAN_OR_EQUAL("gte", ">="), EQUAL("eq", "="), NOT_EQUAL("ne", "!="),
LIKE("like"), IN("in");
private final Set<String> externalValues;
private Comparison(String... values) {
this.externalValues = new HashSet<String>();
Collections.addAll(this.externalValues, values);
}
public boolean is(String externalValue) {
return this.externalValues.contains(externalValue);
}
public static Comparison fromString(String externalValue) {
if (externalValue != null) {
final String externalValueLowerCase = externalValue.toLowerCase();
for (Comparison comparison : Comparison.values()) {
if (comparison.is(externalValueLowerCase)) {
return comparison;
}
}
}
return null;
}
}