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/*******************************************************************************
* Copyright (c) 2004 - 2005 University Of British Columbia and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* University Of British Columbia - initial API and implementation
*******************************************************************************/
package org.eclipse.mylar.bugzilla.core.internal;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import org.eclipse.mylar.bugzilla.BugzillaPlugin;
/**
* A factory for creating ProductConfiguration objects that encapsulate valid
* combinations of products, components, and versions.
*/
public class ProductConfigurationFactory {
/** Singleton factory instance */
private static ProductConfigurationFactory instance;
/**
* Private constructor to ensure singleton instances.
*/
private ProductConfigurationFactory() {
// no initial setup needed
}
/**
* Returns the factory singletoninstance.
*/
public static synchronized ProductConfigurationFactory getInstance() {
if (instance == null) {
instance = new ProductConfigurationFactory();
}
return instance;
}
/**
* Builds a ProductConfiguration object by parsing the source of the
* Bugzilla query page.
*/
public ProductConfiguration getConfiguration(String server) throws IOException {
URL serverURL = new URL(server + "/query.cgi");
ProductConfiguration configuration = new ProductConfiguration();
ArrayList<String []> componentsMatrix = new ArrayList<String []>();
ArrayList<String []> versionsMatrix = new ArrayList<String []>();
URLConnection c = serverURL.openConnection();
BufferedReader in = new BufferedReader(new InputStreamReader(c.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
if (line.startsWith(" cpts[")) {
String [] components = parseComponents(line);
if (components.length > 0) componentsMatrix.add(components);
}
else if (line.startsWith(" vers[")) {
String [] versions = parseComponents(line);
if (versions.length > 0) versionsMatrix.add(versions);
}
else if (line.indexOf("<select name=\"product\"") != -1) {
String [] products = parseProducts(in);
for (int i = 0; i < products.length; i++) {
String product = products[i];
configuration.addProduct(product);
// If components don't jibe with the products, just don't make them available.
if (products.length == componentsMatrix.size()) {
configuration.addComponents(product, componentsMatrix.get(i));
}
// If versions don't jibe with the products, just don't make them available
if (products.length == versionsMatrix.size()) {
configuration.addVersions(product, versionsMatrix.get(i));
}
}
}
}
return configuration;
}
/**
* Returns an array of valid components or versions by parsing the JavaScript
* array in the Bugzilla query page.
*/
protected String [] parseComponents(String line) {
ArrayList<String> components = new ArrayList<String>();
int start = line.indexOf('\'');
if (start >= 0) {
boolean inName = true;
StringBuffer name = new StringBuffer();
for (int i = start+1; i < line.length(); i++){
char ch = line.charAt(i);
if (inName) {
if (ch == '\'') {
components.add(name.toString());
name.setLength(0);
inName = false;
}
else name.append(ch);
}
else {
if (ch == '\'') {
inName = true;
}
}
}
}
return components.toArray(new String[0]);
}
/**
* Returns an array of valid product names by parsing the product selection list
* in the Bugzilla query page.
*/
protected String[] parseProducts(BufferedReader in) throws IOException {
ArrayList<String> products = new ArrayList<String>();
String line;
while ((line = in.readLine()) != null) {
if (line.indexOf("</select>") != -1) break;
int optionIndex = line.indexOf("<option value=\"");
if (optionIndex != -1) {
boolean inName = false;
StringBuffer name = new StringBuffer();
for (int i = optionIndex; i< line.length(); i++) {
char ch = line.charAt(i);
if (inName) {
if (ch == '<') {
products.add(name.toString());
break;
}
else name.append(ch);
}
else {
if (ch == '>') {
inName = true;
}
}
}
}
}
return products.toArray(new String[0]);
}
/**
* Restores a ProductConfiguration from a file.
*/
public ProductConfiguration readConfiguration(File file) throws IOException {
if (!file.exists()) return null;
FileInputStream fin = null;
ProductConfiguration configuration = null;
try {
fin = new FileInputStream(file);
ObjectInputStream in = new ObjectInputStream(fin);
configuration = (ProductConfiguration) in.readObject();
} catch (ClassNotFoundException e) {
BugzillaPlugin.log(e);
IOException ex = new IOException();
ex.initCause(e);
throw ex;
} finally {
if (fin != null)
fin.close();
}
return configuration;
}
/**
* Saves a ProductConfiguration to a file.
*/
public void writeConfiguration(ProductConfiguration configuration, File file) throws IOException {
FileOutputStream fout = null;
try {
fout = new FileOutputStream(file);
ObjectOutputStream out = new ObjectOutputStream(fout);
out.writeObject(configuration);
} finally {
if (fout != null)
fout.close();
}
}
}
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