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
9 package org.opendaylight.bgpmanager;
11 import com.google.common.base.Optional;
12 import com.google.common.base.Preconditions;
14 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
15 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
16 import org.opendaylight.yangtools.yang.binding.DataObject;
17 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
19 import java.util.Collections;
24 * AbstractDataChangeListener implemented basic {@link DataChangeListener} processing for
25 * VPN related Data Objects.
27 public abstract class AbstractDataChangeListener <T extends DataObject> implements DataChangeListener {
29 protected final Class<T> clazz;
31 public AbstractDataChangeListener(Class<T> clazz) {
32 this.clazz = Preconditions.checkNotNull(clazz, "Class can not be null!");
36 public void onDataChanged(final AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changeEvent) {
37 Preconditions.checkNotNull(changeEvent,"Async ChangeEvent can not be null!");
39 /* All DataObjects for create */
40 final Map<InstanceIdentifier<?>, DataObject> createdData = changeEvent.getCreatedData() != null
41 ? changeEvent.getCreatedData() : Collections.<InstanceIdentifier<?>, DataObject> emptyMap();
42 /* All DataObjects for remove */
43 final Set<InstanceIdentifier<?>> removeData = changeEvent.getRemovedPaths() != null
44 ? changeEvent.getRemovedPaths() : Collections.<InstanceIdentifier<?>> emptySet();
45 /* All DataObjects for updates */
46 final Map<InstanceIdentifier<?>, DataObject> updateData = changeEvent.getUpdatedData() != null
47 ? changeEvent.getUpdatedData() : Collections.<InstanceIdentifier<?>, DataObject> emptyMap();
48 /* All Original DataObjects */
49 final Map<InstanceIdentifier<?>, DataObject> originalData = changeEvent.getOriginalData() != null
50 ? changeEvent.getOriginalData() : Collections.<InstanceIdentifier<?>, DataObject> emptyMap();
52 this.createData(createdData);
53 this.updateData(updateData, originalData);
54 this.removeData(removeData, originalData);
57 @SuppressWarnings("unchecked")
58 private void createData(final Map<InstanceIdentifier<?>, DataObject> createdData) {
59 final Set<InstanceIdentifier<?>> keys = createdData.keySet() != null
60 ? createdData.keySet() : Collections.<InstanceIdentifier<?>> emptySet();
61 for (InstanceIdentifier<?> key : keys) {
62 if (clazz.equals(key.getTargetType())) {
63 InstanceIdentifier<T> createKeyIdent = key.firstIdentifierOf(clazz);
64 final Optional<DataObject> value = Optional.of(createdData.get(key));
65 if (value.isPresent()) {
66 this.add(createKeyIdent, (T)value.get());
72 @SuppressWarnings("unchecked")
73 private void updateData(final Map<InstanceIdentifier<?>, DataObject> updateData,
74 final Map<InstanceIdentifier<?>, DataObject> originalData) {
76 final Set<InstanceIdentifier<?>> keys = updateData.keySet() != null
77 ? updateData.keySet() : Collections.<InstanceIdentifier<?>> emptySet();
78 for (InstanceIdentifier<?> key : keys) {
79 if (clazz.equals(key.getTargetType())) {
80 InstanceIdentifier<T> updateKeyIdent = key.firstIdentifierOf(clazz);
81 final Optional<DataObject> value = Optional.of(updateData.get(key));
82 final Optional<DataObject> original = Optional.of(originalData.get(key));
83 if (value.isPresent() && original.isPresent()) {
84 this.update(updateKeyIdent, (T)original.get(), (T)value.get());
90 @SuppressWarnings("unchecked")
91 private void removeData(final Set<InstanceIdentifier<?>> removeData,
92 final Map<InstanceIdentifier<?>, DataObject> originalData) {
94 for (InstanceIdentifier<?> key : removeData) {
95 if (clazz.equals(key.getTargetType())) {
96 final InstanceIdentifier<T> ident = key.firstIdentifierOf(clazz);
97 final DataObject removeValue = originalData.get(key);
98 this.remove(ident, (T)removeValue);
103 protected abstract void remove(InstanceIdentifier<T> identifier, T del);
105 protected abstract void update(InstanceIdentifier<T> identifier, T original, T update);
107 protected abstract void add(InstanceIdentifier<T> identifier, T add);