/*
* JBoss, Home of Professional Open Source
* Copyright 2013, Red Hat, Inc. and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.richfaces.resource.optimizer.resource.util;
import static org.richfaces.resource.optimizer.strings.Constants.COLON_JOINER;
import static org.richfaces.resource.optimizer.strings.Constants.DOT_JOINER;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.Collection;
import java.util.Comparator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.faces.application.Resource;
import org.richfaces.resource.ResourceKey;
import org.richfaces.resource.optimizer.vfs.VFSRoot;
import org.richfaces.resource.optimizer.vfs.VirtualFile;
import com.google.common.collect.Lists;
import com.google.common.collect.Ordering;
import com.google.common.primitives.Ints;
/**
* @author Nick Belaevski
*
*/
public final class ResourceUtil {
private static final String CLASSPATH_RESOURCES_LOCATION = "META-INF/resources";
private static final String WEB_RESOURCES_LOCATION = "resources";
private static final Pattern LIBRARY_VERSION_PATTERN = Pattern.compile("^(\\d+)(_\\d+)+");
private static final Pattern RESOURCE_VERSION_PATTERN = Pattern.compile("^((?:\\d+)(?:_\\d+)+)[\\.]?(\\w+)?");
public static final class VersionKey {
static final Ordering<VersionKey> ORDERING = Ordering.from(new Comparator<VersionKey>() {
@Override
public int compare(VersionKey o1, VersionKey o2) {
return Ints.lexicographicalComparator().compare(o1.versionVector, o2.versionVector);
}
}).nullsFirst();
private String version;
private int[] versionVector;
private String extension;
public VersionKey(String version, String extension) throws NumberFormatException {
this.version = version;
this.versionVector = parseVersionString(version);
this.extension = extension;
}
private static int[] parseVersionString(String s) {
String[] split = s.split("_");
int[] result = new int[split.length];
for (int i = 0; i < result.length; i++) {
result[i] = Integer.parseInt(split[i]);
}
return result;
}
public String toString() {
return DOT_JOINER.join(version, extension);
}
}
private ResourceUtil() {
}
public static VirtualFile getLatestVersion(VirtualFile file, boolean library) {
VersionKey latestVersionKey = null;
Collection<VirtualFile> children = file.getChildren();
for (VirtualFile child : children) {
if (library && child.isDirectory()) {
Matcher matcher = LIBRARY_VERSION_PATTERN.matcher(child.getName());
if (matcher.matches()) {
latestVersionKey = VersionKey.ORDERING.max(latestVersionKey, new VersionKey(child.getName(), null));
}
} else if (!library && child.isFile()) {
Matcher matcher = RESOURCE_VERSION_PATTERN.matcher(child.getName());
if (matcher.matches()) {
latestVersionKey = VersionKey.ORDERING.max(latestVersionKey,
new VersionKey(matcher.group(1), matcher.group(2)));
}
}
}
VirtualFile result;
if (latestVersionKey != null) {
result = file.getChild(latestVersionKey.toString());
} else {
result = file;
}
if (result != null && (library ^ result.isFile())) {
return result;
}
return null;
}
private static Collection<VirtualFile> getExistingChildren(Iterable<VFSRoot> files, String path) throws URISyntaxException,
IOException {
Collection<VirtualFile> result = Lists.newArrayList();
for (VirtualFile file : files) {
VirtualFile child = file.getChild(path, true);
if (child != null) {
result.add(child);
}
}
return result;
}
public static Collection<VirtualFile> getResourceRoots(Iterable<VFSRoot> cpRoots, Iterable<VFSRoot> webRoots)
throws URISyntaxException, IOException {
List<VirtualFile> result = Lists.newArrayList();
result.addAll(getExistingChildren(cpRoots, CLASSPATH_RESOURCES_LOCATION));
result.addAll(getExistingChildren(webRoots, WEB_RESOURCES_LOCATION));
return result;
}
public static String getResourceQualifier(Resource resource) {
return COLON_JOINER.join(resource.getLibraryName(), resource.getResourceName());
}
/**
* Returns the qualified name of resourceKey in format libraryName:resourceName.
*
* @param resourceKey the resourceKey
* @return the qualified name of resourceKey in format libraryName:resourceName.
*/
public static String getResourceQualifier(ResourceKey resourceKey) {
return COLON_JOINER.join(resourceKey.getLibraryName(), resourceKey.getResourceName());
}
/**
* Returns true if resourceKey and resource represents same resource.
*
* @param resourceKey resource key representation of resource
* @param resource resource instance
* @return true if resourceKey and resource represents same resource; false otherwise
*/
public static boolean isSameResource(Resource resource, ResourceKey resourceKey) {
return resourceKey.getLibraryName().equals(defaultString(resource.getLibraryName()))
&& resourceKey.getResourceName().equals(resource.getResourceName());
}
private static String defaultString(String string) {
return string == null ? null : string;
}
}