org.eclipse.jdt.internal.core.index.JarIndexLocation Maven / Gradle / Ivy
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/*******************************************************************************
* Copyright (c) 2011, 2022 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* 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.JarURLConnection;
import java.net.URL;
import java.util.Objects;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
public class JarIndexLocation extends IndexLocation {
private JarFile jarFile = null;
private JarEntry jarEntry = null;
private final URL localUrl;
public JarIndexLocation(URL url, URL localUrl2) {
super(url);
this.localUrl = localUrl2;
}
@Override
public boolean createNewFile() throws IOException {
return false;
}
@Override
public void close() {
if (this.jarFile != null) {
try {
this.jarFile.close();
} catch (IOException e) {
// ignore
}
this.jarFile = null;
}
}
@Override
public boolean delete() {
return false;
}
@Override
public boolean equals(Object other) {
if (!(other instanceof JarIndexLocation)) return false;
return Objects.equals(this.localUrl, ((JarIndexLocation) other).localUrl);
}
@Override
public boolean exists() {
try {
if (this.jarFile == null) {
JarURLConnection connection = (JarURLConnection) this.localUrl.openConnection();
connection.setUseCaches(false);
try (JarFile file = connection.getJarFile()) {
if (file == null) {
return false;
}
}
}
} catch (IOException e) {
return false;
}
return true;
}
@Override
public String fileName() {
return null;
}
@Override
public File getIndexFile() {
return null;
}
@Override
InputStream getInputStream() throws IOException {
if (this.jarFile == null) {
JarURLConnection connection = (JarURLConnection) this.localUrl.openConnection();
connection.setUseCaches(false);
this.jarFile = connection.getJarFile();
this.jarEntry = connection.getJarEntry();
}
if (this.jarFile == null || this.jarEntry == null)
return null;
return this.jarFile.getInputStream(this.jarEntry);
}
@Override
public String getCanonicalFilePath() {
return null;
}
@Override
public long lastModified() {
return -1;
}
@Override
public long length() {
return -1;
}
@Override
public boolean startsWith(IPath path) {
return (path.isPrefixOf(new Path(this.localUrl.getPath())));
}
}