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/*
* 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.tuscany.sca.contribution.scanner.impl;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.security.AccessControlException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.tuscany.sca.contribution.Artifact;
import org.apache.tuscany.sca.contribution.Contribution;
import org.apache.tuscany.sca.contribution.ContributionFactory;
import org.apache.tuscany.sca.contribution.PackageType;
import org.apache.tuscany.sca.contribution.processor.ContributionReadException;
import org.apache.tuscany.sca.contribution.scanner.ContributionScanner;
/**
* Folder contribution processor.
*
* @version $Rev$ $Date$
*/
public class DirectoryContributionScanner implements ContributionScanner {
private static final Logger logger = Logger.getLogger(DirectoryContributionScanner.class.getName());
private ContributionFactory contributionFactory;
public DirectoryContributionScanner(ContributionFactory contributionFactory) {
this.contributionFactory = contributionFactory;
}
public String getContributionType() {
return PackageType.FOLDER;
}
public List<Artifact> scan(Contribution contribution) throws ContributionReadException {
File directory = directory(contribution);
List<Artifact> artifacts = new ArrayList<Artifact>();
List<String> artifactURIs = scanContributionArtifacts(contribution);
for(String uri : artifactURIs) {
try {
File file = new File(directory, uri);
Artifact artifact = contributionFactory.createArtifact();
artifact.setURI(uri);
artifact.setLocation(file.toURI().toURL().toString());
artifacts.add(artifact);
} catch (MalformedURLException e) {
throw new ContributionReadException(e);
}
}
contribution.getTypes().add(getContributionType());
return artifacts;
}
/**
* Scan the contribution to retrieve all artifact uris
*
* @param contribution
* @return
* @throws ContributionReadException
*/
private List<String> scanContributionArtifacts(Contribution contribution) throws ContributionReadException {
File directory = directory(contribution);
List<String> artifacts = new ArrayList<String>();
// [rfeng] There are cases that the folder contains symbolic links that point to the same physical directory
Set<File> visited = new HashSet<File>();
try {
traverse(artifacts, directory, directory, visited);
} catch (IOException e) {
throw new ContributionReadException(e);
}
return artifacts;
}
/**
* Recursively traverse a root directory
*
* @param fileList
* @param file
* @param root
* @param visited The visited directories
* @throws IOException
*/
private static void traverse(List<String> fileList, File file, File root, Set<File> visited) throws IOException {
//TUSCANY-3667 - Google add some private directories when you deploy your application
//to GAE and trying to execute file IO operations on it's contents fails with AccessControlException
try {
if (file.isFile()) {
fileList.add(root.toURI().relativize(file.toURI()).toString());
} else if (file.isDirectory()) {
File dir = file.getCanonicalFile();
if (!visited.contains(dir)) {
// [rfeng] Add the canonical file into the visited set to avoid duplicate navigation of directories
// following the symbolic links
visited.add(dir);
String uri = root.toURI().relativize(file.toURI()).toString();
if (uri.endsWith("/")) {
uri = uri.substring(0, uri.length() - 1);
}
fileList.add(uri);
File[] files = file.listFiles();
for (File f : files) {
if (!f.getName().startsWith(".")) {
traverse(fileList, f, root, visited);
}
}
}
}
} catch (AccessControlException e) {
//TUSCANY-3667 - Log the AccessControlException error and continue without processing the file/directory
logger.log(Level.WARNING, "Error traversing file:" + file.getPath());
}
}
/**
* Get the contribution location as a file
*
* @param contribution
* @return
* @throws ContributionReadException
*/
private File directory(Contribution contribution) throws ContributionReadException {
File file;
URI uri = null;
try {
uri = new URI(contribution.getLocation());
file = new File(uri);
} catch (URISyntaxException e) {
throw new ContributionReadException(e);
} catch(IllegalArgumentException e) {
// Hack for file:./a.txt or file:../a/c.wsdl
return new File(uri.getPath());
}
if (!file.exists() || !file.isDirectory()) {
throw new ContributionReadException(contribution.getLocation());
}
return file;
}
}
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