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