aboutsummaryrefslogtreecommitdiff
path: root/src/org/traccar/database/GroupTree.java
diff options
context:
space:
mode:
Diffstat (limited to 'src/org/traccar/database/GroupTree.java')
-rw-r--r--src/org/traccar/database/GroupTree.java153
1 files changed, 153 insertions, 0 deletions
diff --git a/src/org/traccar/database/GroupTree.java b/src/org/traccar/database/GroupTree.java
new file mode 100644
index 000000000..b383b1501
--- /dev/null
+++ b/src/org/traccar/database/GroupTree.java
@@ -0,0 +1,153 @@
+/*
+ * Copyright 2016 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * 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 org.traccar.database;
+
+import org.traccar.model.Device;
+import org.traccar.model.Group;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+public class GroupTree {
+
+ private static class TreeNode {
+
+ private Group group;
+ private Device device;
+ private Collection<TreeNode> children = new HashSet<>();
+
+ public TreeNode(Group group) {
+ this.group = group;
+ }
+
+ public TreeNode(Device device) {
+ this.device = device;
+ }
+
+ @Override
+ public int hashCode() {
+ if (group != null) {
+ return (int) group.getId();
+ } else {
+ return (int) device.getId();
+ }
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (!(obj instanceof TreeNode)) {
+ return false;
+ }
+ TreeNode other = (TreeNode) obj;
+ if (other == this) {
+ return true;
+ }
+ if (group != null) {
+ if (other.group != null) {
+ return group.getId() == other.group.getId();
+ }
+ } else if (device != null) {
+ if (other.device != null) {
+ return device.getId() == other.device.getId();
+ }
+ }
+ return false;
+ }
+
+ public Group getGroup() {
+ return group;
+ }
+
+ public Device getDevice() {
+ return device;
+ }
+
+ public void setParent(TreeNode parent) {
+ if (parent != null) {
+ parent.children.add(this);
+ }
+ }
+
+ public Collection<TreeNode> getChildren() {
+ return children;
+ }
+
+ }
+
+ private final Map<Long, TreeNode> groupMap = new HashMap<>();
+
+ public GroupTree(Collection<Group> groups, Collection<Device> devices) {
+
+ for (Group group : groups) {
+ groupMap.put(group.getId(), new TreeNode(group));
+ }
+
+ for (TreeNode node : groupMap.values()) {
+ if (node.getGroup().getGroupId() != 0) {
+ node.setParent(groupMap.get(node.getGroup().getGroupId()));
+ }
+ }
+
+ Map<Long, TreeNode> deviceMap = new HashMap<>();
+
+ for (Device device : devices) {
+ deviceMap.put(device.getId(), new TreeNode(device));
+ }
+
+ for (TreeNode node : deviceMap.values()) {
+ if (node.getDevice().getGroupId() != 0) {
+ node.setParent(groupMap.get(node.getDevice().getGroupId()));
+ }
+ }
+
+ }
+
+ public Collection<Group> getGroups(long groupId) {
+ Set<TreeNode> results = new HashSet<>();
+ getNodes(results, groupMap.get(groupId));
+ Collection<Group> groups = new ArrayList<>();
+ for (TreeNode node : results) {
+ if (node.getGroup() != null) {
+ groups.add(node.getGroup());
+ }
+ }
+ return groups;
+ }
+
+ public Collection<Device> getDevices(long groupId) {
+ Set<TreeNode> results = new HashSet<>();
+ getNodes(results, groupMap.get(groupId));
+ Collection<Device> devices = new ArrayList<>();
+ for (TreeNode node : results) {
+ if (node.getDevice() != null) {
+ devices.add(node.getDevice());
+ }
+ }
+ return devices;
+ }
+
+ private void getNodes(Set<TreeNode> results, TreeNode node) {
+ for (TreeNode child : node.getChildren()) {
+ results.add(child);
+ getNodes(results, child);
+ }
+ }
+
+}