diff options
Diffstat (limited to 'POLICY-SDK-APP/src/main/java/org/onap/policy/utils/PolicyItemSetChangeNotifier.java')
-rw-r--r-- | POLICY-SDK-APP/src/main/java/org/onap/policy/utils/PolicyItemSetChangeNotifier.java | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/POLICY-SDK-APP/src/main/java/org/onap/policy/utils/PolicyItemSetChangeNotifier.java b/POLICY-SDK-APP/src/main/java/org/onap/policy/utils/PolicyItemSetChangeNotifier.java new file mode 100644 index 000000000..92764aa4f --- /dev/null +++ b/POLICY-SDK-APP/src/main/java/org/onap/policy/utils/PolicyItemSetChangeNotifier.java @@ -0,0 +1,95 @@ +/*- + * ============LICENSE_START======================================================= + * ONAP Policy Engine + * ================================================================================ + * Copyright (C) 2017 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.utils; + + +import java.io.Serializable; +import java.util.Collection; +import java.util.EventObject; +import java.util.LinkedList; + +import org.onap.policy.utils.PolicyContainer.ItemSetChangeEvent; +import org.onap.policy.utils.PolicyContainer.ItemSetChangeListener; + + + +public class PolicyItemSetChangeNotifier implements PolicyContainer.ItemSetChangeNotifier { + private static final long serialVersionUID = 1L; + private Collection<PolicyContainer.ItemSetChangeListener> itemSetChangeListeners = null; + private PolicyContainer container = null; + + public PolicyItemSetChangeNotifier() { + } + + protected void setContainer(PolicyContainer c) { + this.container = c; + } + + @Override + public void addItemSetChangeListener(ItemSetChangeListener listener) { + if (getItemSetChangeListeners() == null) { + setItemSetChangeListeners(new LinkedList<PolicyContainer.ItemSetChangeListener>()); + } + getItemSetChangeListeners().add(listener); } + + @Override + public void removeItemSetChangeListener(ItemSetChangeListener listener) { + if (getItemSetChangeListeners() != null) { + getItemSetChangeListeners().remove(listener); + } + } + + protected static class BaseItemSetChangeEvent extends EventObject implements + PolicyContainer.ItemSetChangeEvent, Serializable { + private static final long serialVersionUID = 1L; + + protected BaseItemSetChangeEvent(PolicyContainer source) { + super(source); + } + + @Override + public PolicyContainer getContainer() { + return (PolicyContainer) getSource(); + } + } + + protected void setItemSetChangeListeners( + Collection<PolicyContainer.ItemSetChangeListener> itemSetChangeListeners) { + this.itemSetChangeListeners = itemSetChangeListeners; + } + protected Collection<PolicyContainer.ItemSetChangeListener> getItemSetChangeListeners() { + return itemSetChangeListeners; + } + + protected void fireItemSetChange() { + fireItemSetChange(new BaseItemSetChangeEvent(this.container)); + } + + protected void fireItemSetChange(ItemSetChangeEvent event) { + if (getItemSetChangeListeners() != null) { + final Object[] l = getItemSetChangeListeners().toArray(); + for (int i = 0; i < l.length; i++) { + ((PolicyContainer.ItemSetChangeListener) l[i]) + .containerItemSetChange(event); + } + } + } +} |