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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.osgi.remoteserviceadmin.impl;
import java.net.URL;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashSet;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Filter;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceReference;
/**
*
*/
public class OSGiHelper {
private OSGiHelper() {
}
/**
* In OSGi, the value of String+ can be a single String, String[] or Collection<String>
* @param value
* @return
*/
public static String[] getStringArray(Object value) {
if (value == null) {
return null;
}
if (value instanceof String) {
return new String[] {(String)value};
} else if (value instanceof Collection) {
Collection<String> collection = (Collection)value;
return collection.toArray(new String[collection.size()]);
}
return (String[])value;
}
public static Collection<String> getStringCollection(Object value) {
String[] values = getStringArray(value);
if (values == null) {
return null;
} else {
return Arrays.asList(values);
}
}
public static String[] getStringArray(ServiceReference serviceReference, String propertyName) {
Object propertyValue = serviceReference.getProperty(propertyName);
return getStringArray(propertyValue);
}
public static Collection<String> getStringCollection(ServiceReference serviceReference, String propertyName) {
Object propertyValue = serviceReference.getProperty(propertyName);
return getStringCollection(propertyValue);
}
public static Filter createFilter(BundleContext context, String filterValue) {
if (filterValue == null) {
return null;
}
try {
return context.createFilter(filterValue);
} catch (InvalidSyntaxException ex) {
throw new IllegalArgumentException("Invalid Filter: " + filterValue, ex);
}
}
/**
* Get a collection of resources that are configured by the given header
* @param bundle The bundle
* @param header
* @param defaultValue
* @return
*/
public static Collection<URL> getConfiguration(Bundle bundle, String header, String defaultValue) {
String value = (String)bundle.getHeaders().get(header);
if (value == null) {
return Collections.emptyList();
}
String paths[] = value.trim().split("( |\t|\n|\r|\f|,)+");
if (paths.length == 0) {
if (defaultValue != null) {
paths = new String[] {defaultValue};
} else {
paths = new String[0];
}
}
Collection<URL> files = new HashSet<URL>();
for (String path : paths) {
if (path.endsWith("/")) {
path = path + "*.xml";
}
if (!path.startsWith("/")) {
path = "/" + path;
}
int lastIndex = path.lastIndexOf('/');
String root = path.substring(0, lastIndex);
if ("".equals(root)) {
root = "/";
}
String pattern = path.substring(lastIndex + 1);
Enumeration<URL> entries = bundle.findEntries(root, pattern, false);
if (entries != null) {
while (entries.hasMoreElements()) {
files.add(entries.nextElement());
}
}
}
return files;
}
}
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