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