Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
* 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;
}
}