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/*******************************************************************************
* Copyright (c) 2011 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.core.index;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;
import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.IPath;
/**
* The location of the index files are represented as {@link IndexLocation}
*
* This is an abstract class to allow different implementation for a jar entry and a file
* on the disk. Some of these functions could mean different for a jar entry or a file
*
*/
public abstract class IndexLocation {
public static IndexLocation createIndexLocation(URL url) {
URL localUrl;
try {
localUrl = FileLocator.resolve(url);
} catch (IOException e) {
return null;
}
if (localUrl.getProtocol().equals("file")) { //$NON-NLS-1$
File localFile = null;
try {
URI localFileURI = new URI(localUrl.toExternalForm());
localFile = new File(localFileURI);
}
catch(Exception ex) {
localFile = new File(localUrl.getPath());
}
return new FileIndexLocation(url, localFile);
}
return new JarIndexLocation(url, localUrl);
}
private final URL url; // url of the given index location
/**
* Set to true if this index location is of an index file specified
* by a participant through
* {@link org.eclipse.jdt.core.search.SearchParticipant#scheduleDocumentIndexing}
*/
protected boolean participantIndex;
protected IndexLocation(File file) {
URL tempUrl = null;
try {
tempUrl = file.toURI().toURL();
} catch (MalformedURLException e) {
// should not happen
}
this.url = tempUrl;
}
public IndexLocation(URL url) {
this.url = url;
}
/**
* Closes any open streams.
*/
public void close() {
// default nothing to do
}
/**
* Creates a new file for the given index location
* @return true if the file is created
* @throws IOException
*/
public abstract boolean createNewFile() throws IOException;
public abstract boolean delete();
public abstract boolean exists();
public abstract String fileName();
/**
* @return the canonical file path if the location is a file or null otherwise
*/
public abstract String getCanonicalFilePath();
public abstract File getIndexFile();
abstract InputStream getInputStream() throws IOException;
public URL getUrl() {
return this.url;
}
public int hashCode() {
return this.url.hashCode();
}
public boolean isParticipantIndex() {
return this.participantIndex;
}
/**
* @return the last modified time if the location is a file or -1 otherwise
*/
public abstract long lastModified();
/**
* @return the length of the file if the location is a file or -1 otherwise
*/
public abstract long length();
public abstract boolean startsWith(IPath path);
public String toString() {
return this.url.toString();
}
}
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