com.aspectran.core.context.resource.ResourceManager Maven / Gradle / Ivy
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/*
* Copyright (c) 2008-2025 The Aspectran Project
*
* Licensed 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 com.aspectran.core.context.resource;
import com.aspectran.utils.PathUtils;
import com.aspectran.utils.ResourceUtils;
import com.aspectran.utils.StringUtils;
import com.aspectran.utils.annotation.jsr305.NonNull;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.Arrays;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.Objects;
import java.util.jar.JarEntry;
import static com.aspectran.utils.ClassUtils.CLASS_FILE_SUFFIX;
import static com.aspectran.utils.ClassUtils.PACKAGE_SEPARATOR_CHAR;
import static com.aspectran.utils.PathUtils.REGULAR_FILE_SEPARATOR_CHAR;
import static com.aspectran.utils.ResourceUtils.CLASSPATH_URL_PREFIX;
import static com.aspectran.utils.ResourceUtils.FILE_URL_PREFIX;
/**
* The Class ResourceManager.
*
* Created: 2014. 12. 18 PM 5:51:13
*/
public class ResourceManager {
private final ResourceEntries resourceEntries = new ResourceEntries();
ResourceManager() {
}
public URL getResource(String name) {
return resourceEntries.get(name);
}
protected Iterator getResources() {
return resourceEntries.values().iterator();
}
public int getNumberOfResources() {
return resourceEntries.size();
}
protected void putResource(String resourceName, File file) throws InvalidResourceException {
resourceEntries.putResource(resourceName, file);
}
protected void putResource(File file, JarEntry entry) throws InvalidResourceException {
resourceEntries.putResource(file, entry);
}
public void reset() throws InvalidResourceException {
release();
}
public void release() {
resourceEntries.clear();
}
@NonNull
public static Enumeration findResources(final Iterator siblings) {
return new Enumeration<>() {
private Iterator iter;
private URL next;
private boolean hasNext() {
while (true) {
if (iter == null) {
if (!siblings.hasNext()) {
return false;
}
iter = siblings.next().getResourceManager().getResources();
}
if (iter.hasNext()) {
next = iter.next();
return true;
}
iter = null;
}
}
@Override
public boolean hasMoreElements() {
return (next != null || hasNext());
}
@Override
public URL nextElement() {
if (next == null) {
if (!hasNext()) {
throw new NoSuchElementException();
}
}
URL current = next;
next = null;
return current;
}
};
}
@NonNull
public static Enumeration findResources(String name, final Iterator siblings) {
return findResources(name, siblings, null);
}
@NonNull
public static Enumeration findResources(
String name, final Iterator siblings, final Enumeration parentResources) {
if (name == null || siblings == null) {
return Collections.emptyEnumeration();
}
if (StringUtils.endsWith(name, REGULAR_FILE_SEPARATOR_CHAR)) {
name = name.substring(0, name.length() - 1);
}
final String nameToSearch = name;
return new Enumeration<>() {
private URL next;
private boolean noMore; //for parent
private boolean hasNext() {
do {
if (siblings.hasNext()) {
next = siblings.next().getResourceManager().getResource(nameToSearch);
} else {
return false;
}
} while (next == null);
return true;
}
@Override
public boolean hasMoreElements() {
if (!noMore) {
if (parentResources != null && parentResources.hasMoreElements()) {
return true;
} else {
noMore = true;
}
}
return (next != null || hasNext());
}
@Override
public URL nextElement() {
if (!noMore) {
if (parentResources != null && parentResources.hasMoreElements()) {
return parentResources.nextElement();
}
}
if (next == null) {
if (!hasNext()) {
throw new NoSuchElementException();
}
}
URL current = next;
next = null;
return current;
}
};
}
@NonNull
public static String resourceNameToClassName(@NonNull String resourceName) {
String className = resourceName.substring(0, resourceName.length() - CLASS_FILE_SUFFIX.length());
className = className.replace(REGULAR_FILE_SEPARATOR_CHAR, PACKAGE_SEPARATOR_CHAR);
return className;
}
@NonNull
public static String classNameToResourceName(@NonNull String className) {
return className.replace(PACKAGE_SEPARATOR_CHAR, REGULAR_FILE_SEPARATOR_CHAR)
+ CLASS_FILE_SUFFIX;
}
public static String packageNameToResourceName(@NonNull String packageName) {
String resourceName = packageName.replace(PACKAGE_SEPARATOR_CHAR, REGULAR_FILE_SEPARATOR_CHAR);
if (StringUtils.endsWith(resourceName, REGULAR_FILE_SEPARATOR_CHAR)) {
resourceName = resourceName.substring(0, resourceName.length() - 1);
}
return resourceName;
}
public static String[] checkResourceLocations(String[] resourceLocations, String basePath)
throws InvalidResourceException {
if (resourceLocations == null || resourceLocations.length == 0) {
return null;
}
String[] resourceLocationsToUse = resourceLocations.clone();
for (int i = 0; i < resourceLocationsToUse.length; i++) {
String tempLocation = resourceLocationsToUse[i];
if (tempLocation != null) {
tempLocation = PathUtils.cleanPath(tempLocation);
if (StringUtils.endsWith(tempLocation, REGULAR_FILE_SEPARATOR_CHAR)) {
tempLocation = tempLocation.substring(0, tempLocation.length() - 1);
}
if (tempLocation.startsWith(CLASSPATH_URL_PREFIX)) {
String path = tempLocation.substring(CLASSPATH_URL_PREFIX.length());
try {
URL url = ResourceUtils.getResource(path);
tempLocation = url.getPath();
} catch (IOException e) {
throw new InvalidResourceException("Class path resource [" + tempLocation +
"] cannot be resolved to URL", e);
}
} else if (tempLocation.startsWith(FILE_URL_PREFIX)) {
try {
URL url = ResourceUtils.toURL(tempLocation);
tempLocation = url.getFile();
} catch (Exception e) {
throw new InvalidResourceException("Resource location [" + tempLocation +
"] is neither a URL not a well-formed file path", e);
}
} else {
try {
File f;
if (StringUtils.hasText(basePath)) {
f = new File(basePath, tempLocation);
if (!f.exists()) {
File f2 = new File(tempLocation);
if (f2.exists()) {
f = f2;
}
}
} else {
f = new File(tempLocation);
}
tempLocation = f.getCanonicalPath();
} catch (IOException e) {
throw new InvalidResourceException("Invalid resource location: " + tempLocation, e);
}
}
resourceLocationsToUse[i] = tempLocation;
}
}
for (int i = 0; i < resourceLocationsToUse.length - 1; i++) {
String tempLocation1 = resourceLocationsToUse[i];
if (tempLocation1 != null) {
for (int j = i + 1; j < resourceLocationsToUse.length; j++) {
String tempLocation2 = resourceLocationsToUse[j];
if (tempLocation2 != null) {
if (tempLocation1.equals(tempLocation2)) {
resourceLocationsToUse[j] = null;
}
}
}
}
}
return Arrays.stream(resourceLocationsToUse).filter(Objects::nonNull).toArray(String[]::new);
}
}
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