Mercurial Hosting > luan
view src/org/eclipse/jetty/util/resource/ResourceCollection.java @ 1022:3718afd99988
HttpHeaders uses StringCache
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 01 Nov 2016 01:04:46 -0600 |
parents | 6939226e0ac4 |
children |
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// // ======================================================================== // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd. // ------------------------------------------------------------------------ // All rights reserved. This program and the accompanying materials // are made available under the terms of the Eclipse Public License v1.0 // and Apache License v2.0 which accompanies this distribution. // // The Eclipse Public License is available at // http://www.eclipse.org/legal/epl-v10.html // // The Apache License v2.0 is available at // http://www.opensource.org/licenses/apache2.0.php // // You may elect to redistribute this code under either of these licenses. // ======================================================================== // package org.eclipse.jetty.util.resource; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.MalformedURLException; import java.net.URL; import java.util.ArrayList; import java.util.Arrays; import java.util.HashSet; import java.util.List; import java.util.StringTokenizer; import org.eclipse.jetty.util.URIUtil; /** * A collection of resources (dirs). * Allows webapps to have multiple (static) sources. * The first resource in the collection is the main resource. * If a resource is not found in the main resource, it looks it up in * the order the resources were constructed. * * * */ public class ResourceCollection extends Resource { private Resource[] _resources; /* ------------------------------------------------------------ */ /** * Instantiates an empty resource collection. * * This constructor is used when configuring jetty-maven-plugin. */ public ResourceCollection() { _resources = new Resource[0]; } /* ------------------------------------------------------------ */ /** * Instantiates a new resource collection. * * @param resources the resources to be added to collection */ public ResourceCollection(Resource... resources) { List<Resource> list = new ArrayList<Resource>(); for (Resource r : resources) { if (r==null) continue; if (r instanceof ResourceCollection) { for (Resource r2 : ((ResourceCollection)r).getResources()) list.add(r2); } else list.add(r); } _resources = list.toArray(new Resource[list.size()]); for(Resource r : _resources) { if(!r.exists() || !r.isDirectory()) throw new IllegalArgumentException(r + " is not an existing directory."); } } /* ------------------------------------------------------------ */ /** * Instantiates a new resource collection. * * @param resources the resource strings to be added to collection */ public ResourceCollection(String[] resources) { _resources = new Resource[resources.length]; try { for(int i=0; i<resources.length; i++) { _resources[i] = Resource.newResource(resources[i]); if(!_resources[i].exists() || !_resources[i].isDirectory()) throw new IllegalArgumentException(_resources[i] + " is not an existing directory."); } } catch(IllegalArgumentException e) { throw e; } catch(Exception e) { throw new RuntimeException(e); } } /* ------------------------------------------------------------ */ /** * Instantiates a new resource collection. * * @param csvResources the string containing comma-separated resource strings */ public ResourceCollection(String csvResources) { setResourcesAsCSV(csvResources); } /* ------------------------------------------------------------ */ /** * Retrieves the resource collection's resources. * * @return the resource array */ public Resource[] getResources() { return _resources; } /* ------------------------------------------------------------ */ /** * Sets the resource collection's resources. * * @param resources the new resource array */ public void setResources(Resource[] resources) { _resources = resources != null ? resources : new Resource[0]; } /* ------------------------------------------------------------ */ /** * Sets the resources as string of comma-separated values. * This method should be used when configuring jetty-maven-plugin. * * @param csvResources the comma-separated string containing * one or more resource strings. */ public void setResourcesAsCSV(String csvResources) { StringTokenizer tokenizer = new StringTokenizer(csvResources, ",;"); int len = tokenizer.countTokens(); if(len==0) { throw new IllegalArgumentException("ResourceCollection@setResourcesAsCSV(String) " + " argument must be a string containing one or more comma-separated resource strings."); } _resources = new Resource[len]; try { for(int i=0; tokenizer.hasMoreTokens(); i++) { _resources[i] = Resource.newResource(tokenizer.nextToken().trim()); if(!_resources[i].exists() || !_resources[i].isDirectory()) throw new IllegalArgumentException(_resources[i] + " is not an existing directory."); } } catch(Exception e) { throw new RuntimeException(e); } } /* ------------------------------------------------------------ */ /** * @param path The path segment to add * @return The contained resource (found first) in the collection of resources */ @Override public Resource addPath(String path) throws IOException, MalformedURLException { if(_resources==null) throw new IllegalStateException("*resources* not set."); if(path==null) throw new MalformedURLException(); if(path.length()==0 || "/".equals(path)) return this; Resource resource=null; ArrayList<Resource> resources = null; int i=0; for(; i<_resources.length; i++) { resource = _resources[i].addPath(path); if (resource.exists()) { if (resource.isDirectory()) break; return resource; } } for(i++; i<_resources.length; i++) { Resource r = _resources[i].addPath(path); if (r.exists() && r.isDirectory()) { if (resource!=null) { resources = new ArrayList<Resource>(); resources.add(resource); resource=null; } resources.add(r); } } if (resource!=null) return resource; if (resources!=null) return new ResourceCollection(resources.toArray(new Resource[resources.size()])); return null; } /* ------------------------------------------------------------ */ /** * @param path * @return the resource(file) if found, returns a list of resource dirs if its a dir, else null. * @throws IOException * @throws MalformedURLException */ protected Object findResource(String path) throws IOException, MalformedURLException { Resource resource=null; ArrayList<Resource> resources = null; int i=0; for(; i<_resources.length; i++) { resource = _resources[i].addPath(path); if (resource.exists()) { if (resource.isDirectory()) break; return resource; } } for(i++; i<_resources.length; i++) { Resource r = _resources[i].addPath(path); if (r.exists() && r.isDirectory()) { if (resource!=null) { resources = new ArrayList<Resource>(); resources.add(resource); } resources.add(r); } } if (resource!=null) return resource; if (resources!=null) return resources; return null; } /* ------------------------------------------------------------ */ @Override public boolean delete() throws SecurityException { throw new UnsupportedOperationException(); } /* ------------------------------------------------------------ */ @Override public boolean exists() { if(_resources==null) throw new IllegalStateException("*resources* not set."); return true; } /* ------------------------------------------------------------ */ @Override public File getFile() throws IOException { if(_resources==null) throw new IllegalStateException("*resources* not set."); for(Resource r : _resources) { File f = r.getFile(); if(f!=null) return f; } return null; } /* ------------------------------------------------------------ */ @Override public InputStream getInputStream() throws IOException { if(_resources==null) throw new IllegalStateException("*resources* not set."); for(Resource r : _resources) { InputStream is = r.getInputStream(); if(is!=null) return is; } return null; } /* ------------------------------------------------------------ */ @Override public String getName() { if(_resources==null) throw new IllegalStateException("*resources* not set."); for(Resource r : _resources) { String name = r.getName(); if(name!=null) return name; } return null; } /* ------------------------------------------------------------ */ @Override public OutputStream getOutputStream() throws IOException, SecurityException { if(_resources==null) throw new IllegalStateException("*resources* not set."); for(Resource r : _resources) { OutputStream os = r.getOutputStream(); if(os!=null) return os; } return null; } /* ------------------------------------------------------------ */ @Override public URL getURL() { if(_resources==null) throw new IllegalStateException("*resources* not set."); for(Resource r : _resources) { URL url = r.getURL(); if(url!=null) return url; } return null; } /* ------------------------------------------------------------ */ @Override public boolean isDirectory() { if(_resources==null) throw new IllegalStateException("*resources* not set."); return true; } /* ------------------------------------------------------------ */ @Override public long lastModified() { if(_resources==null) throw new IllegalStateException("*resources* not set."); for(Resource r : _resources) { long lm = r.lastModified(); if (lm!=-1) return lm; } return -1; } /* ------------------------------------------------------------ */ @Override public long length() { return -1; } /* ------------------------------------------------------------ */ /** * @return The list of resource names(merged) contained in the collection of resources. */ @Override public String[] list() { if(_resources==null) throw new IllegalStateException("*resources* not set."); HashSet<String> set = new HashSet<String>(); for(Resource r : _resources) { for(String s : r.list()) set.add(s); } String[] result=set.toArray(new String[set.size()]); Arrays.sort(result); return result; } /* ------------------------------------------------------------ */ @Override public void release() { if(_resources==null) throw new IllegalStateException("*resources* not set."); for(Resource r : _resources) r.release(); } /* ------------------------------------------------------------ */ @Override public boolean renameTo(Resource dest) throws SecurityException { throw new UnsupportedOperationException(); } /* ------------------------------------------------------------ */ @Override public void copyTo(File destination) throws IOException { for (int r=_resources.length;r-->0;) _resources[r].copyTo(destination); } /* ------------------------------------------------------------ */ /** * @return the list of resources separated by a path separator */ @Override public String toString() { if(_resources==null) return "[]"; return String.valueOf(Arrays.asList(_resources)); } /* ------------------------------------------------------------ */ @Override public boolean isContainedIn(Resource r) throws MalformedURLException { // TODO could look at implementing the semantic of is this collection a subset of the Resource r? return false; } }