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.mdsalutil;
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
26 public abstract class AbstractDataChangeListener<T extends DataObject> implements DataChangeListener {
28 protected final Class<T> clazz;
31 * @param clazz - for which the data change event is received
33 public AbstractDataChangeListener(Class<T> clazz) {
34 this.clazz = Preconditions.checkNotNull(clazz, "Class can not be null!");
38 public void onDataChanged(final AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changeEvent) {
39 Preconditions.checkNotNull(changeEvent,"Async ChangeEvent can not be null!");
41 /* All DataObjects for create */
42 final Map<InstanceIdentifier<?>, DataObject> createdData = changeEvent.getCreatedData() != null
43 ? changeEvent.getCreatedData() : Collections.<InstanceIdentifier<?>, DataObject>emptyMap();
44 /* All DataObjects for remove */
45 final Set<InstanceIdentifier<?>> removeData = changeEvent.getRemovedPaths() != null
46 ? changeEvent.getRemovedPaths() : Collections.<InstanceIdentifier<?>>emptySet();
47 /* All DataObjects for updates */
48 final Map<InstanceIdentifier<?>, DataObject> updateData = changeEvent.getUpdatedData() != null
49 ? changeEvent.getUpdatedData() : Collections.<InstanceIdentifier<?>, DataObject>emptyMap();
50 /* All Original DataObjects */
51 final Map<InstanceIdentifier<?>, DataObject> originalData = changeEvent.getOriginalData() != null
52 ? changeEvent.getOriginalData() : Collections.<InstanceIdentifier<?>, DataObject>emptyMap();
54 this.createData(createdData);
55 this.updateData(updateData, originalData);
56 this.removeData(removeData, originalData);
59 @SuppressWarnings("unchecked")
60 private void createData(final Map<InstanceIdentifier<?>, DataObject> createdData) {
61 final Set<InstanceIdentifier<?>> keys = createdData.keySet() != null
62 ? createdData.keySet() : Collections.<InstanceIdentifier<?>>emptySet();
63 for (InstanceIdentifier<?> key : keys) {
64 if (clazz.equals(key.getTargetType())) {
65 InstanceIdentifier<T> createKeyIdent = key.firstIdentifierOf(clazz);
66 final Optional<DataObject> value = Optional.of(createdData.get(key));
67 if (value.isPresent()) {
68 this.add(createKeyIdent, (T)value.get());
74 @SuppressWarnings("unchecked")
75 private void updateData(final Map<InstanceIdentifier<?>, DataObject> updateData,
76 final Map<InstanceIdentifier<?>, DataObject> originalData) {
78 final Set<InstanceIdentifier<?>> keys = updateData.keySet() != null
79 ? updateData.keySet() : Collections.<InstanceIdentifier<?>>emptySet();
80 for (InstanceIdentifier<?> key : keys) {
81 if (clazz.equals(key.getTargetType())) {
82 InstanceIdentifier<T> updateKeyIdent = key.firstIdentifierOf(clazz);
83 final Optional<DataObject> value = Optional.of(updateData.get(key));
84 final Optional<DataObject> original = Optional.of(originalData.get(key));
85 if (value.isPresent() && original.isPresent()) {
86 this.update(updateKeyIdent, (T)original.get(), (T)value.get());
92 @SuppressWarnings("unchecked")
93 private void removeData(final Set<InstanceIdentifier<?>> removeData,
94 final Map<InstanceIdentifier<?>, DataObject> originalData) {
96 for (InstanceIdentifier<?> key : removeData) {
97 if (clazz.equals(key.getTargetType())) {
98 final InstanceIdentifier<T> ident = key.firstIdentifierOf(clazz);
99 final DataObject removeValue = originalData.get(key);
100 this.remove(ident, (T)removeValue);
105 protected abstract void remove(InstanceIdentifier<T> identifier, T del);
107 protected abstract void update(InstanceIdentifier<T> identifier, T original, T update);
109 protected abstract void add(InstanceIdentifier<T> identifier, T add);