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Diffstat (limited to '')
-rw-r--r-- | sca-java-2.x/tags/2.0-Beta2-RC3/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/io/IOHelper.java | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0-Beta2-RC3/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/io/IOHelper.java b/sca-java-2.x/tags/2.0-Beta2-RC3/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/io/IOHelper.java new file mode 100644 index 0000000000..91aef7a65f --- /dev/null +++ b/sca-java-2.x/tags/2.0-Beta2-RC3/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/io/IOHelper.java @@ -0,0 +1,167 @@ +/* + * 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.common.java.io; + +import java.io.File; +import java.io.FileInputStream; +import java.io.IOException; +import java.io.InputStream; +import java.net.JarURLConnection; +import java.net.MalformedURLException; +import java.net.URI; +import java.net.URISyntaxException; +import java.net.URL; +import java.net.URLConnection; + +/** + * Helper class for I/O operations + * @tuscany.spi.extension.asclient + */ +public class IOHelper { + + public static InputStream openStream(URL url) throws IOException { + // Handle file:<relative path> which strictly speaking is not a valid file URL + File file = toFile(url); + if (file != null) { + return new FileInputStream(file); + } + URLConnection connection = url.openConnection(); + if (connection instanceof JarURLConnection) { + // See http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5041014 + connection.setUseCaches(false); + } + InputStream is = connection.getInputStream(); + return is; + } + + public static void close(InputStream is) { + if (is != null) { + try { + is.close(); + } catch (IOException e) { + throw new IllegalStateException(e); + } + } + } + + /** + * Escape the space in URL string + * @param uri + * @return + */ + public static URI createURI(String uri) { + if (uri == null) { + return null; + } + if (uri.indexOf('%') != -1) { + // Avoid double-escaping + return URI.create(uri); + } + int index = uri.indexOf(':'); + String scheme = null; + String ssp = uri; + if (index != -1) { + scheme = uri.substring(0, index); + ssp = uri.substring(index + 1); + } + try { + return new URI(scheme, ssp, null); + } catch (URISyntaxException e) { + throw new IllegalArgumentException(e); + } + } + + public static URI toURI(URL url) { + if (url == null) { + return null; + } + return createURI(url.toString()); + } + + public static URL normalize(URL url) { + // Make sure the trailing / is added to the file directory URL so that + // URLClassLoader can load classes from that + try { + File file = toFile(url); + if (file != null) { + return file.toURI().toURL(); + } else { + return toURI(url).toURL(); + } + } catch (MalformedURLException e) { + throw new IllegalArgumentException(e); + } + } + + /** + * Returns the File object representing the given URL. + * + * @param url + * @return + */ + public static File toFile(URL url) { + if (url == null || !url.getProtocol().equals("file")) { + return null; + } else { + String filename = url.getFile().replace('/', File.separatorChar); + int pos = 0; + while ((pos = filename.indexOf('%', pos)) >= 0) { + if (pos + 2 < filename.length()) { + String hexStr = filename.substring(pos + 1, pos + 3); + char ch = (char)Integer.parseInt(hexStr, 16); + filename = filename.substring(0, pos) + ch + filename.substring(pos + 3); + } + } + return new File(filename); + } + } + + /** + * Returns the location of the classpath entry, JAR, WAR etc. containing the given class. + * + * @param clazz + * @return + */ + public static URL codeLocation(Class<?> clazz) { + URL url = clazz.getProtectionDomain().getCodeSource().getLocation(); + if (url == null) { + url = clazz.getResource("/" + clazz.getName().replace('.', '/') + ".class"); + } + return url; + } + + /** + * Returns a location string as a URL + * @param location + * @return + */ + public static URL getLocationAsURL(String location) { + URI uri = IOHelper.createURI(location); + if (uri.getScheme() == null) { + uri = new File(location).toURI(); + } + try { + return uri.toURL(); + } catch (MalformedURLException e) { + throw new IllegalArgumentException(location, e); + } + } + +} |