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-rw-r--r--utils/src/main/java/org/onap/policy/common/utils/properties/SpecProperties.java117
1 files changed, 117 insertions, 0 deletions
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
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+++ 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");
+ }
+}