org.apache.openjpa.lib.meta.ClasspathMetaDataIterator Maven / Gradle / Ivy
/*
* 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.openjpa.lib.meta;
import java.io.File;
import java.io.IOException;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.util.Properties;
import java.util.zip.ZipFile;
import org.apache.openjpa.lib.util.J2DoPrivHelper;
import org.apache.openjpa.lib.util.StringUtil;
/**
* Iterator over directories in the classpath.
*
* @author Abe White
*/
public class ClasspathMetaDataIterator extends MetaDataIteratorChain {
/**
* Default constructor; iterates over all classpath elements.
*/
public ClasspathMetaDataIterator() throws IOException {
this(null, null);
}
/**
* Constructor; supply the classpath directories to scan and an optional
* resource filter. The given directories may be null to scan all
* classpath directories.
*/
public ClasspathMetaDataIterator(String[] dirs, MetaDataFilter filter)
throws IOException {
Properties props = AccessController.doPrivileged(
J2DoPrivHelper.getPropertiesAction());
String path = props.getProperty("java.class.path");
String[] tokens = StringUtil.split(path,
props.getProperty("path.separator"), 0);
for (int i = 0; i < tokens.length; i++) {
if (dirs != null && dirs.length != 0 && !endsWith(tokens[i], dirs))
continue;
File file = new File(tokens[i]);
if (!(AccessController.doPrivileged(
J2DoPrivHelper.existsAction(file))).booleanValue())
continue;
if (AccessController.doPrivileged(J2DoPrivHelper
.isDirectoryAction(file)).booleanValue())
addIterator(new FileMetaDataIterator(file, filter));
else if (tokens[i].endsWith(".jar")) {
try {
ZipFile zFile = AccessController
.doPrivileged(J2DoPrivHelper.newZipFileAction(file));
addIterator(new ZipFileMetaDataIterator(zFile, filter));
} catch (PrivilegedActionException pae) {
throw (IOException) pae.getException();
}
}
}
}
/**
* Return true if the given token ends with any of the given strings.
*/
private static boolean endsWith(String token, String[] suffs) {
for (int i = 0; i < suffs.length; i++)
if (token.endsWith(suffs[i]))
return true;
return false;
}
}