/*
* URLContent.java 25 avr. 2006
*
* Sweet Home 3D, Copyright (c) 2006 Emmanuel PUYBARET / eTeks <info@eteks.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.eteks.sweethome3d.tools;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLConnection;
import com.eteks.sweethome3d.model.Content;
/**
* URL content for files, images...
* @author Emmanuel Puybaret
*/
public class URLContent implements Content {
private static final long serialVersionUID = 1L;
private URL url;
public URLContent(URL url) {
this.url = url;
}
/**
* Returns the URL of this content.
*/
public URL getURL() {
return this.url;
}
/**
* Returns an InputStream on the URL content.
* @throws IOException if URL stream can't be opened.
*/
public InputStream openStream() throws IOException {
URLConnection connection = getURL().openConnection();
if (OperatingSystem.isWindows() && isJAREntry()) {
URL jarEntryURL = getJAREntryURL();
if (jarEntryURL.getProtocol().equalsIgnoreCase("file")) {
try {
if (new File(jarEntryURL.toURI()).canWrite()) {
// Even if cache is actually not used for JAR entries of files, refuse explicitly to use
// caches to be able to delete the writable files accessed with jar protocol under Windows,
// as suggested in http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6962459
connection.setUseCaches(false);
}
} catch (URISyntaxException ex) {
IOException ex2 = new IOException();
ex2.initCause(ex);
throw ex2;
}
}
}
return connection.getInputStream();
}
/**
* Returns <code>true</code> if the URL stored by this content
* references an entry in a JAR.
*/
public boolean isJAREntry() {
return "jar".equals(this.url.getProtocol());
}
/**
* Returns the URL base of a JAR entry.
* @throws IllegalStateException if the URL of this content
* doesn't reference an entry in a JAR.
*/
public URL getJAREntryURL() {
if (!isJAREntry()) {
throw new IllegalStateException("Content isn't a JAR entry");
}
try {
String file = this.url.getFile();
return new URL(file.substring(0, file.indexOf('!')));
} catch (MalformedURLException ex) {
throw new IllegalStateException("Invalid URL base for JAR entry", ex);
}
}
/**
* Returns the name of a JAR entry.
* If the JAR entry in the URL given at creation time was encoded in application/x-www-form-urlencoded format,
* this method will return it unchanged and not decoded.
* @throws IllegalStateException if the URL of this content
* doesn't reference an entry in a JAR URL.
*/
public String getJAREntryName() {
if (!isJAREntry()) {
throw new IllegalStateException("Content isn't a JAR entry");
}
String file = this.url.getFile();
return file.substring(file.indexOf('!') + 2);
}
/**
* Returns <code>true</code> if the object in parameter is an URL content
* that references the same URL as this object.
*/
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
} else if (obj instanceof URLContent) {
URLContent urlContent = (URLContent)obj;
return urlContent.url == this.url
|| urlContent.url.equals(this.url);
} else {
return false;
}
}
@Override
public int hashCode() {
return this.url.hashCode();
}
}