/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.sis.storage;
//JDK imports
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
//SIS imports
import org.apache.sis.core.LatLon;
/**
* Class to reload the quad tree index from file.
*
*/
public class QuadTreeReader {
/**
* Loads the quad tree index from file.
*
* @param directory
* the directory where the index files are located
* @param treeConfigFile
* the name of the tree configuration file
* @param nodeFile
* the name of the root node file
* @return fully loaded QuadTree
*/
public static QuadTree readFromFile(final String directory,
final String treeConfigFile, final String nodeFile) {
QuadTree tree = new QuadTree();
readConfigFromFile(tree, directory, treeConfigFile);
readFromFile(tree, tree.getRoot(), directory, nodeFile);
return tree;
}
private static void readConfigFromFile(QuadTree tree, String directory,
String treeConfigFile) {
try {
BufferedReader reader = new BufferedReader(new FileReader(directory
+ treeConfigFile));
String line = "";
while ((line = reader.readLine()) != null) {
String[] tokens = line.split(";");
int capacity = Integer.parseInt(tokens[1]);
int depth = Integer.parseInt(tokens[3]);
tree.setCapacity(capacity);
tree.setDepth(depth);
}
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (NumberFormatException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private static void readFromFile(final QuadTree tree,
final QuadTreeNode parent, final String directory, final String filename) {
try {
BufferedReader reader = new BufferedReader(new FileReader(directory
+ filename));
String line = "";
while ((line = reader.readLine()) != null) {
String[] tokens = line.split(":");
Quadrant quadrant = Quadrant.getQuadrant(Integer.parseInt(tokens[0]));
String nodetype = tokens[1];
int id = Integer.parseInt(tokens[2]);
if (nodetype.equals("GRAY")) {
parent.setChild(new QuadTreeNode(NodeType.GRAY, id), quadrant);
tree.setNodeSize(tree.getNodeSize() + 1);
} else {
int capacity = Integer.parseInt(tokens[3]);
parent.setChild(new QuadTreeNode(id, capacity), quadrant);
for (int i = 4; i < tokens.length; i++) {
String[] dataTokens = tokens[i].split(";");
double lat = Double.parseDouble(dataTokens[0]);
double lon = Double.parseDouble(dataTokens[1]);
parent.getChild(quadrant).addData(
new GeoRSSData(dataTokens[2], new LatLon(lat, lon)));
tree.setSize(tree.getSize() + 1);
}
tree.setNodeSize(tree.getNodeSize() + 1);
}
}
reader.close();
if (parent.getChild(Quadrant.NW) != null
&& parent.getChild(Quadrant.NW).getNodeType() == NodeType.GRAY) {
readFromFile(tree, parent.getChild(Quadrant.NW), directory, "node_"
+ parent.getChild(Quadrant.NW).getId() + ".txt");
}
if (parent.getChild(Quadrant.NE) != null
&& parent.getChild(Quadrant.NE).getNodeType() == NodeType.GRAY) {
readFromFile(tree, parent.getChild(Quadrant.NE), directory, "node_"
+ parent.getChild(Quadrant.NE).getId() + ".txt");
}
if (parent.getChild(Quadrant.SW) != null
&& parent.getChild(Quadrant.SW).getNodeType() == NodeType.GRAY) {
readFromFile(tree, parent.getChild(Quadrant.SW), directory, "node_"
+ parent.getChild(Quadrant.SW).getId() + ".txt");
}
if (parent.getChild(Quadrant.SE) != null
&& parent.getChild(Quadrant.SE).getNodeType() == NodeType.GRAY) {
readFromFile(tree, parent.getChild(Quadrant.SE), directory, "node_"
+ parent.getChild(Quadrant.SE).getId() + ".txt");
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NumberFormatException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}