From 719ef33eaac70c8b98e85e1440ab2cea00415bc9 Mon Sep 17 00:00:00 2001 From: Jim Hahn Date: Mon, 18 Jun 2018 17:29:01 -0400 Subject: Move SpecProperties from drools-pdp to common Change-Id: Ifa1785922b42f990d4d84c1410dd1d881b10647d Issue-ID: POLICY-907 Signed-off-by: Jim Hahn --- .../common/utils/properties/SpecProperties.java | 117 +++++++++++++++++++++ 1 file changed, 117 insertions(+) create mode 100644 utils/src/main/java/org/onap/policy/common/utils/properties/SpecProperties.java (limited to 'utils/src/main') diff --git a/utils/src/main/java/org/onap/policy/common/utils/properties/SpecProperties.java b/utils/src/main/java/org/onap/policy/common/utils/properties/SpecProperties.java new file mode 100644 index 00000000..0f416c3a --- /dev/null +++ b/utils/src/main/java/org/onap/policy/common/utils/properties/SpecProperties.java @@ -0,0 +1,117 @@ +/* + * ============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.common.utils.properties; + +import java.util.Properties; + +/** + * Properties with an optional specialization (e.g., session name, controller name). + */ +public class SpecProperties extends Properties { + private static final long serialVersionUID = 1L; + + /** + * The property prefix, ending with ".". + */ + private final String prefix; + + /** + * The specialized property prefix, ending with ".". + */ + private final String specPrefix; + + /** + * + * @param prefix the property name prefix that appears before any specialization, may + * be "" + * @param specialization the property name specialization (e.g., session name) + */ + public SpecProperties(String prefix, String specialization) { + this.prefix = withTrailingDot(prefix); + this.specPrefix = withTrailingDot(this.prefix + specialization); + } + + /** + * + * @param prefix the property name prefix that appears before any specialization, may + * be "" + * @param specialization the property name specialization (e.g., session name) + * @param props the default properties + */ + public SpecProperties(String prefix, String specialization, Properties props) { + super(props); + + this.prefix = withTrailingDot(prefix); + this.specPrefix = withTrailingDot(this.prefix + specialization); + } + + /** + * Adds a trailing "." to a String, if it doesn't already have one. + * + * @param text text to which the "." should be added + * @return the text, with a trailing "." + */ + private static String withTrailingDot(String text) { + return text.isEmpty() || text.endsWith(".") ? text : text + "."; + } + + /** + * Gets the property whose value has the given key, looking first for the specialized + * property name, and then for the generalized property name. + * + * @param key property name, without the specialization + * @return the value from the property set, or {@code null} if the property set does + * not contain the value + */ + @Override + public String getProperty(String key) { + if (!key.startsWith(prefix)) { + return super.getProperty(key); + } + + String suffix = key.substring(prefix.length()); + + String val = super.getProperty(specPrefix + suffix); + if (val != null) { + return val; + } + + return super.getProperty(key); + } + + protected String getPrefix() { + return prefix; + } + + protected String getSpecPrefix() { + return specPrefix; + } + + @Override + public final int hashCode() { + throw new UnsupportedOperationException("SpecProperties cannot be hashed"); + } + + @Override + public final boolean equals(Object obj) { + throw new UnsupportedOperationException("cannot compare SpecProperties"); + } +} -- cgit 1.2.3-korg