2 * Copyright (c) 2015 Ericsson India Global Services Pvt Ltd. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.vpnservice;
10 import com.google.common.base.Optional;
11 import com.google.common.base.Preconditions;
13 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
14 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
15 import org.opendaylight.yangtools.yang.binding.DataObject;
16 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
18 import java.util.Collections;
23 * AbstractDataChangeListener implemented basic {@link DataChangeListener} processing for
24 * VPN related Data Objects.
26 public abstract class AbstractDataChangeListener<T extends DataObject> implements DataChangeListener {
28 protected final Class<T> clazz;
32 * @param clazz - for which the data change event is received
34 public AbstractDataChangeListener(Class<T> clazz) {
35 this.clazz = Preconditions.checkNotNull(clazz, "Class can not be null!");
39 public void onDataChanged(final AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changeEvent) {
40 Preconditions.checkNotNull(changeEvent,"Async ChangeEvent can not be null!");
42 /* All DataObjects for create */
43 final Map<InstanceIdentifier<?>, DataObject> createdData = changeEvent.getCreatedData() != null
44 ? changeEvent.getCreatedData() : Collections.<InstanceIdentifier<?>, DataObject>emptyMap();
45 /* All DataObjects for remove */
46 final Set<InstanceIdentifier<?>> removeData = changeEvent.getRemovedPaths() != null
47 ? changeEvent.getRemovedPaths() : Collections.<InstanceIdentifier<?>>emptySet();
48 /* All DataObjects for updates */
49 final Map<InstanceIdentifier<?>, DataObject> updateData = changeEvent.getUpdatedData() != null
50 ? changeEvent.getUpdatedData() : Collections.<InstanceIdentifier<?>, DataObject>emptyMap();
51 /* All Original DataObjects */
52 final Map<InstanceIdentifier<?>, DataObject> originalData = changeEvent.getOriginalData() != null
53 ? changeEvent.getOriginalData() : Collections.<InstanceIdentifier<?>, DataObject>emptyMap();
55 this.createData(createdData);
56 this.updateData(updateData, originalData);
57 this.removeData(removeData, originalData);
60 @SuppressWarnings("unchecked")
61 private void createData(final Map<InstanceIdentifier<?>, DataObject> createdData) {
62 final Set<InstanceIdentifier<?>> keys = createdData.keySet() != null
63 ? createdData.keySet() : Collections.<InstanceIdentifier<?>>emptySet();
64 for (InstanceIdentifier<?> key : keys) {
65 if (clazz.equals(key.getTargetType())) {
66 InstanceIdentifier<T> createKeyIdent = key.firstIdentifierOf(clazz);
67 final Optional<DataObject> value = Optional.of(createdData.get(key));
68 if (value.isPresent()) {
69 this.add(createKeyIdent, (T)value.get());
75 @SuppressWarnings("unchecked")
76 private void updateData(final Map<InstanceIdentifier<?>, DataObject> updateData,
77 final Map<InstanceIdentifier<?>, DataObject> originalData) {
79 final Set<InstanceIdentifier<?>> keys = updateData.keySet() != null
80 ? updateData.keySet() : Collections.<InstanceIdentifier<?>>emptySet();
81 for (InstanceIdentifier<?> key : keys) {
82 if (clazz.equals(key.getTargetType())) {
83 InstanceIdentifier<T> updateKeyIdent = key.firstIdentifierOf(clazz);
84 final Optional<DataObject> value = Optional.of(updateData.get(key));
85 final Optional<DataObject> original = Optional.of(originalData.get(key));
86 if (value.isPresent() && original.isPresent()) {
87 this.update(updateKeyIdent, (T)original.get(), (T)value.get());
93 @SuppressWarnings("unchecked")
94 private void removeData(final Set<InstanceIdentifier<?>> removeData,
95 final Map<InstanceIdentifier<?>, DataObject> originalData) {
97 for (InstanceIdentifier<?> key : removeData) {
98 if (clazz.equals(key.getTargetType())) {
99 final InstanceIdentifier<T> ident = key.firstIdentifierOf(clazz);
100 final DataObject removeValue = originalData.get(key);
101 this.remove(ident, (T)removeValue);
106 protected abstract void remove(InstanceIdentifier<T> identifier, T del);
108 protected abstract void update(InstanceIdentifier<T> identifier, T original, T update);
110 protected abstract void add(InstanceIdentifier<T> identifier, T add);