com.google.firebase.database.core.view.Change Maven / Gradle / Ivy
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This is the official Firebase Admin Java SDK. Build extraordinary native JVM apps in
minutes with Firebase. The Firebase platform can power your app’s backend, user
authentication, static hosting, and more.
/*
* Copyright 2017 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.firebase.database.core.view;
import com.google.firebase.database.snapshot.ChildKey;
import com.google.firebase.database.snapshot.IndexedNode;
import com.google.firebase.database.snapshot.Node;
public class Change {
private final Event.EventType eventType;
private final IndexedNode indexedNode;
private final IndexedNode oldIndexedNode;
private final ChildKey childKey;
private final ChildKey prevName;
private Change(
Event.EventType eventType,
IndexedNode indexedNode,
ChildKey childKey,
ChildKey prevName,
IndexedNode oldIndexedNode) {
this.eventType = eventType;
this.indexedNode = indexedNode;
this.childKey = childKey;
this.prevName = prevName;
this.oldIndexedNode = oldIndexedNode;
}
public static Change valueChange(IndexedNode snapshot) {
return new Change(Event.EventType.VALUE, snapshot, null, null, null);
}
public static Change childAddedChange(ChildKey childKey, Node snapshot) {
return childAddedChange(childKey, IndexedNode.from(snapshot));
}
public static Change childAddedChange(ChildKey childKey, IndexedNode snapshot) {
return new Change(Event.EventType.CHILD_ADDED, snapshot, childKey, null, null);
}
public static Change childRemovedChange(ChildKey childKey, Node snapshot) {
return childRemovedChange(childKey, IndexedNode.from(snapshot));
}
public static Change childRemovedChange(ChildKey childKey, IndexedNode snapshot) {
return new Change(Event.EventType.CHILD_REMOVED, snapshot, childKey, null, null);
}
public static Change childChangedChange(ChildKey childKey, Node newSnapshot, Node oldSnapshot) {
return childChangedChange(
childKey, IndexedNode.from(newSnapshot), IndexedNode.from(oldSnapshot));
}
public static Change childChangedChange(
ChildKey childKey, IndexedNode newSnapshot, IndexedNode oldSnapshot) {
return new Change(Event.EventType.CHILD_CHANGED, newSnapshot, childKey, null, oldSnapshot);
}
public static Change childMovedChange(ChildKey childKey, Node snapshot) {
return Change.childMovedChange(childKey, IndexedNode.from(snapshot));
}
public static Change childMovedChange(ChildKey childKey, IndexedNode snapshot) {
return new Change(Event.EventType.CHILD_MOVED, snapshot, childKey, null, null);
}
public Change changeWithPrevName(ChildKey prevName) {
return new Change(eventType, indexedNode, childKey, prevName, oldIndexedNode);
}
public ChildKey getChildKey() {
return childKey;
}
public Event.EventType getEventType() {
return eventType;
}
public IndexedNode getIndexedNode() {
return indexedNode;
}
public ChildKey getPrevName() {
return prevName;
}
public IndexedNode getOldIndexedNode() {
return this.oldIndexedNode;
}
@Override
public String toString() {
return "Change: " + eventType + " " + childKey;
}
}