diff options
Diffstat (limited to 'feature-pooling-dmaap/src/main/java/org/onap/policy/drools/pooling/state/FilterUtils.java')
-rw-r--r-- | feature-pooling-dmaap/src/main/java/org/onap/policy/drools/pooling/state/FilterUtils.java | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/feature-pooling-dmaap/src/main/java/org/onap/policy/drools/pooling/state/FilterUtils.java b/feature-pooling-dmaap/src/main/java/org/onap/policy/drools/pooling/state/FilterUtils.java new file mode 100644 index 00000000..a2da0ea2 --- /dev/null +++ b/feature-pooling-dmaap/src/main/java/org/onap/policy/drools/pooling/state/FilterUtils.java @@ -0,0 +1,96 @@ +/* + * ============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; + } +} |