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16 package org.apache.cocoon.components.url;
17
18 import org.apache.avalon.framework.activity.Disposable;
19 import org.apache.avalon.framework.component.ComponentException;
20 import org.apache.avalon.framework.component.ComponentManager;
21 import org.apache.avalon.framework.component.Composable;
22 import org.apache.avalon.framework.configuration.Configurable;
23 import org.apache.avalon.framework.configuration.Configuration;
24 import org.apache.avalon.framework.configuration.ConfigurationException;
25 import org.apache.avalon.framework.context.Context;
26 import org.apache.avalon.framework.context.ContextException;
27 import org.apache.avalon.framework.context.Contextualizable;
28 import org.apache.avalon.framework.logger.AbstractLogEnabled;
29 import org.apache.avalon.framework.logger.LogEnabled;
30 import org.apache.avalon.framework.parameters.ParameterException;
31 import org.apache.avalon.framework.parameters.Parameterizable;
32 import org.apache.avalon.framework.parameters.Parameters;
33 import org.apache.avalon.framework.thread.ThreadSafe;
34 import org.apache.cocoon.Constants;
35 import org.apache.cocoon.util.ClassUtils;
36
37 import java.io.File  ;
38 import java.net.MalformedURLException ;
39 import java.net.URL ;
40 import java.util.HashMap ;
41 import java.util.Iterator ;
42 import java.util.Map ;
43
44
45
51 public class URLFactoryImpl extends AbstractLogEnabled
52 implements ThreadSafe, Configurable, Disposable, Composable, Contextualizable, URLFactory {
53
54
57 protected Context context;
58
59
62 protected Map factories;
63
64
65 private ComponentManager manager;
66
67
75 public URL getURL(String location) throws MalformedURLException {
76 Iterator iter = factories.keySet().iterator();
77 String protocol = null;
78 while (iter.hasNext()) {
79 protocol = (String )iter.next();
80 if (location.startsWith(protocol + "://")) {
81 return ((URLFactory)factories.get(protocol)).getURL(location.substring(protocol.length() + 3));
82 }
83 }
84 try {
85 if (getLogger().isDebugEnabled()) {
86 getLogger().debug("Making URL from " + location);
87 }
88 return new URL (location);
89 } catch (MalformedURLException mue) {
90 if (getLogger().isDebugEnabled()) {
91 getLogger().debug("Making URL - MalformedURLException in getURL:" , mue);
92 }
93
94 org.apache.cocoon.environment.Context envContext = null;
95 try {
96 envContext = (org.apache.cocoon.environment.Context)
97 context.get(Constants.CONTEXT_ENVIRONMENT_CONTEXT);
98 } catch (ContextException e){
99 getLogger().error("Making URL - ContextException in getURL",e);
100 }
101
102 final String path = envContext.getRealPath(location);
103 if (path != null)
104 return (new File (path)).toURL();
105
106 if (getLogger().isDebugEnabled()) {
107 getLogger().debug("Making URL a Resource:" + location);
108 }
109 URL url = envContext.getResource(location);
110 if(url != null)
111 return url;
112
113 if (getLogger().isDebugEnabled()) {
114 getLogger().debug("Making URL a File (assuming that it is full path):" + location);
115 }
116 return (new File (location)).toURL();
117 }
118 }
119
120 public URL getURL(URL base, String location) throws MalformedURLException {
121 if ( base != null ) {
122 if (base.getProtocol().equals("file")) {
123 File temp = new File (base.toExternalForm().substring("file:".length()), location);
124 String path = temp.getAbsolutePath();
125 if (path.charAt(0) != File.separator.charAt(0)) {
127 return getURL("file:/" + path);
128 } else {
129 return getURL("file:" + path);
130 }
131 }
132
133 return getURL(new URL (base, location).toExternalForm());
134 } else {
135 return getURL(location);
136 }
137 }
138
139
142 public void contextualize(Context context) throws ContextException {
143 if (this.context == null) {
144 this.context = context;
145 }
146 }
147
148
151 public void configure(final Configuration conf)
152 throws ConfigurationException {
153 try {
154 getLogger().debug("Getting the URLFactories");
155 factories = new HashMap ();
156 Configuration[] configs = conf.getChildren("protocol");
157 URLFactory urlFactory = null;
158 String protocol = null;
159 for (int i = 0; i < configs.length; i++) {
160 protocol = configs[i].getAttribute("name");
161 if (factories.containsKey(protocol)) {
162 throw new ConfigurationException("URLFactory defined twice for protocol: " + protocol);
163 }
164 if (getLogger().isDebugEnabled()) {
165 getLogger().debug("\tfor protocol: " + protocol + " " + configs[i].getAttribute("class"));
166 }
167 urlFactory = (URLFactory) ClassUtils.newInstance(configs[i].getAttribute("class"));
168 this.init(urlFactory, configs[i]);
169 factories.put(protocol, urlFactory);
170 }
171 } catch (Exception e) {
172 getLogger().error("Could not get URLFactories", e);
173 throw new ConfigurationException("Could not get parameters because: " +
174 e.getMessage());
175 }
176 }
177
178
182 public void compose(ComponentManager manager)
183 throws ComponentException {
184 this.manager = manager;
185 }
186
187
190 public void dispose() {
191 Iterator iter = this.factories.values().iterator();
192 URLFactory current;
193 while (iter.hasNext()) {
194 current = (URLFactory) iter.next();
195 this.deinit(current);
196 }
197 this.factories = null;
198 }
199
200
203 private void init(URLFactory factory, Configuration config)
204 throws ContextException, ComponentException, ConfigurationException, ParameterException {
205 if (factory instanceof LogEnabled) {
206 ((LogEnabled) factory).enableLogging(getLogger());
207 }
208 if (factory instanceof Contextualizable) {
209 ((Contextualizable) factory).contextualize (this.context);
210 }
211 if (factory instanceof Composable) {
212 ((Composable) factory).compose(this.manager);
213 }
214 if (config != null && factory instanceof Configurable) {
215 ((Configurable) factory).configure(config);
216 }
217 if (config != null && factory instanceof Parameterizable) {
218 ((Parameterizable) factory).parameterize(Parameters.fromConfiguration(config));
219 }
220 }
221
222
225 private void deinit(URLFactory factory) {
226 if (factory instanceof Disposable) {
227 ((Disposable) factory).dispose();
228 }
229 }
230 }
231 |
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