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Diffstat (limited to 'branches/sca-java-2.0-M4/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/impl/OSGiHelper.java')
-rw-r--r-- | branches/sca-java-2.0-M4/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/impl/OSGiHelper.java | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/branches/sca-java-2.0-M4/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/impl/OSGiHelper.java b/branches/sca-java-2.0-M4/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/impl/OSGiHelper.java new file mode 100644 index 0000000000..d5a2b7aa95 --- /dev/null +++ b/branches/sca-java-2.0-M4/modules/node-impl-osgi/src/main/java/org/apache/tuscany/sca/osgi/remoteserviceadmin/impl/OSGiHelper.java @@ -0,0 +1,135 @@ +/* + * 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; + } + +} |