| /* |
| * 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.felix.framework.cache; |
| |
| import org.apache.felix.framework.resolver.Content; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| import java.util.Enumeration; |
| import java.util.NoSuchElementException; |
| |
| public class ContentDirectoryContent implements Content |
| { |
| private final Content m_content; |
| private final String m_rootPath; |
| |
| public ContentDirectoryContent(Content content, String path) |
| { |
| m_content = content; |
| // Add a '/' to the end if not present. |
| m_rootPath = (path.length() > 0) && (path.charAt(path.length() - 1) != '/') |
| ? path + "/" : path; |
| } |
| |
| public void close() |
| { |
| // We do not actually close the associated content |
| // from which we are filtering our directory because |
| // we assume that this will be close manually by |
| // the owner of that content. |
| } |
| |
| public boolean hasEntry(String name) throws IllegalStateException |
| { |
| if ((name.length() > 0) && (name.charAt(0) == '/')) |
| { |
| name = name.substring(1); |
| } |
| |
| return m_content.hasEntry(m_rootPath + name); |
| } |
| |
| public Enumeration getEntries() |
| { |
| return new EntriesEnumeration(m_content.getEntries(), m_rootPath); |
| } |
| |
| public byte[] getEntryAsBytes(String name) throws IllegalStateException |
| { |
| if ((name.length() > 0) && (name.charAt(0) == '/')) |
| { |
| name = name.substring(1); |
| } |
| |
| return m_content.getEntryAsBytes(m_rootPath + name); |
| } |
| |
| public InputStream getEntryAsStream(String name) |
| throws IllegalStateException, IOException |
| { |
| if ((name.length() > 0) && (name.charAt(0) == '/')) |
| { |
| name = name.substring(1); |
| } |
| |
| return m_content.getEntryAsStream(m_rootPath + name); |
| } |
| |
| public URL getEntryAsURL(String name) |
| { |
| return m_content.getEntryAsURL(m_rootPath + name); |
| } |
| |
| public Content getEntryAsContent(String name) |
| { |
| if ((name.length() > 0) && (name.charAt(0) == '/')) |
| { |
| name = name.substring(1); |
| } |
| |
| return m_content.getEntryAsContent(m_rootPath + name); |
| } |
| |
| public String getEntryAsNativeLibrary(String name) |
| { |
| if ((name.length() > 0) && (name.charAt(0) == '/')) |
| { |
| name = name.substring(1); |
| } |
| |
| return m_content.getEntryAsNativeLibrary(m_rootPath + name); |
| } |
| |
| public String toString() |
| { |
| return "CONTENT DIR " + m_rootPath + " (" + m_content + ")"; |
| } |
| |
| private static class EntriesEnumeration implements Enumeration |
| { |
| private final Enumeration m_enumeration; |
| private final String m_rootPath; |
| private String m_nextEntry = null; |
| |
| public EntriesEnumeration(Enumeration enumeration, String rootPath) |
| { |
| m_enumeration = enumeration; |
| m_rootPath = rootPath; |
| m_nextEntry = findNextEntry(); |
| } |
| |
| public synchronized boolean hasMoreElements() |
| { |
| return (m_nextEntry != null); |
| } |
| |
| public synchronized Object nextElement() |
| { |
| if (m_nextEntry == null) |
| { |
| throw new NoSuchElementException("No more elements."); |
| } |
| String currentEntry = m_nextEntry; |
| m_nextEntry = findNextEntry(); |
| return currentEntry; |
| } |
| |
| private String findNextEntry() |
| { |
| // Find next entry that is inside the root directory. |
| while (m_enumeration.hasMoreElements()) |
| { |
| String next = (String) m_enumeration.nextElement(); |
| if (next.startsWith(m_rootPath) && !next.equals(m_rootPath)) |
| { |
| // Strip off the root directory. |
| return next.substring(m_rootPath.length()); |
| } |
| } |
| return null; |
| } |
| } |
| } |