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/*
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.drools.pooling.state;
import java.util.Map;
import java.util.TreeMap;
/**
* Filter Utilities. These methods create <i>TreeMap</i> objects, because they
* should only contain a small number of items.
*/
public class FilterUtils {
// message element names
public static final String MSG_CHANNEL = "channel";
public static final String MSG_TIMESTAMP = "timestampMs";
// json element names
protected static final String JSON_CLASS = "class";
protected static final String JSON_FILTERS = "filters";
protected static final String JSON_FIELD = "field";
protected static final String JSON_VALUE = "value";
// values to be stuck into the "class" element
protected static final String CLASS_OR = "Or";
protected static final String CLASS_AND = "And";
protected static final String CLASS_EQUALS = "Equals";
/**
*
*/
private FilterUtils() {
super();
}
/**
* Makes a filter that verifies that a field equals a value.
*
* @param field name of the field to check
* @param value desired value
* @return a map representing an "equals" filter
*/
public static Map<String, Object> makeEquals(String field, String value) {
Map<String, Object> map = new TreeMap<>();
map.put(JSON_CLASS, CLASS_EQUALS);
map.put(JSON_FIELD, field);
map.put(JSON_VALUE, value);
return map;
}
/**
* Makes an "and" filter, where all of the items must be true.
*
* @param items items to be checked
* @return an "and" filter
*/
public static Map<String, Object> makeAnd(@SuppressWarnings("unchecked") Map<String, Object>... items) {
Map<String, Object> map = new TreeMap<>();
map.put(JSON_CLASS, CLASS_AND);
map.put(JSON_FILTERS, items);
return map;
}
/**
* Makes an "or" filter, where at least one of the items must be true.
*
* @param items items to be checked
* @return an "or" filter
*/
public static Map<String, Object> makeOr(@SuppressWarnings("unchecked") Map<String, Object>... items) {
Map<String, Object> map = new TreeMap<>();
map.put(JSON_CLASS, CLASS_OR);
map.put(JSON_FILTERS, items);
return map;
}
}
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