Fixed a small bug where value handler was being set repeatedly.
[java-idp.git] / src / edu / internet2 / middleware / shibboleth / aa / attrresolv / provider / SimpleAttributeDefinition.java
1 /* 
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3  * Copyright (c) 2002 
4  * University Corporation for Advanced Internet Development, Inc. 
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49
50 package edu.internet2.middleware.shibboleth.aa.attrresolv.provider;
51
52 import java.security.Principal;
53 import java.util.Arrays;
54 import java.util.HashSet;
55 import java.util.Iterator;
56 import java.util.Set;
57
58 import javax.naming.NamingEnumeration;
59 import javax.naming.NamingException;
60 import javax.naming.directory.Attribute;
61 import javax.naming.directory.Attributes;
62
63 import org.apache.log4j.Logger;
64 import org.w3c.dom.Element;
65
66 import edu.internet2.middleware.shibboleth.aa.attrresolv.AttributeDefinitionPlugIn;
67 import edu.internet2.middleware.shibboleth.aa.attrresolv.Dependencies;
68 import edu.internet2.middleware.shibboleth.aa.attrresolv.ResolutionPlugInException;
69 import edu.internet2.middleware.shibboleth.aa.attrresolv.ResolverAttribute;
70
71 /**
72  * Basic <code>AttributeDefinitionPlugIn</code> implementation.  Operates as a proxy for attributes
73  * gathered by Connectors.
74  * 
75  * @author Walter Hoehn (wassa@columbia.edu)
76  */
77 public class SimpleAttributeDefinition extends BaseAttributeDefinition implements AttributeDefinitionPlugIn {
78
79         private static Logger log = Logger.getLogger(SimpleAttributeDefinition.class.getName());
80         private String connectorMapping;
81         private String smartScope;
82         private String schemaType;
83         private String schemaNamespace;
84         private ValueHandler valueHandler;
85
86         /**
87          * Constructor for SimpleAttributeDefinition.  Creates a PlugIn based on configuration
88          * information presented in a DOM Element.
89          */
90         public SimpleAttributeDefinition(Element e) throws ResolutionPlugInException {
91
92                 super(e);
93
94                 String sourceName = e.getAttribute("sourceName");
95                 if (sourceName == null || sourceName.equals("")) {
96                         int index = getId().lastIndexOf("#");
97                         if (index < 0) {
98                                 index = getId().lastIndexOf(":");
99                                 int slashIndex = getId().lastIndexOf("/");
100                                 if (slashIndex > index) {
101                                         index = slashIndex;
102                                 }
103                         }
104                         connectorMapping = getId().substring(index + 1);
105                 } else {
106                         connectorMapping = sourceName;
107                 }
108
109                 log.debug("Mapping attribute to name (" + connectorMapping + ") in connector.");
110
111                 String smartScopingSpec = e.getAttribute("smartScope");
112                 if (smartScopingSpec != null && !smartScopingSpec.equals("")) {
113                         smartScope = smartScopingSpec;
114                 }
115                 if (smartScope != null) {
116                         log.debug("Smart Scope (" + smartScope + ") enabled for attribute (" + getId() + ").");
117                 } else {
118                         log.debug("Smart Scoping disabled for attribute (" + getId() + ").");
119                 }
120
121                 String valueHandlerSpec = e.getAttribute("valueHandler");
122
123                 if (valueHandlerSpec != null && !valueHandlerSpec.equals("")) {
124                         if (smartScope == null) {
125                                 try {
126                                         Class handlerClass = Class.forName(valueHandlerSpec);
127                                         valueHandler = (ValueHandler) handlerClass.newInstance();
128                                 } catch (ClassNotFoundException cnfe) {
129                                         log.error(
130                                                 "Value Handler implementation specified for attribute ("
131                                                         + getId()
132                                                         + ") cannot be found: "
133                                                         + cnfe);
134                                         throw new ResolutionPlugInException(
135                                                 "Value Handler implementation specified for attribute (" + getId() + ") cannot be found.");
136                                 } catch (Exception oe) {
137                                         log.error(
138                                                 "Value Handler implementation specified for attribute ("
139                                                         + getId()
140                                                         + ") coudl not be loaded: "
141                                                         + oe);
142                                         throw new ResolutionPlugInException(
143                                                 "Value Handler implementation specified for attribute (" + getId() + ") could not be loaded.");
144                                 }
145                         } else {
146                                 log.error(
147                                         "Specification of \"valueHandler\' cannot be used in combination with \"smartScope\".  Ignoring Value Handler for attribute ("
148                                                 + getId()
149                                                 + ").");
150                         }
151                 }
152
153                 if (valueHandler != null) {
154                         log.debug("Custom Value Handler enabled for attribute (" + getId() + ").");
155                 }
156
157         }
158
159         /**
160          * @see edu.internet2.middleware.shibboleth.aa.attrresolv.AttributeDefinitionPlugIn#resolve(edu.internet2.middleware.shibboleth.aa.attrresolv.ArpAttribute, java.security.Principal, java.lang.String, edu.internet2.middleware.shibboleth.aa.attrresolv.Dependencies)
161          */
162         public void resolve(ResolverAttribute attribute, Principal principal, String requester, Dependencies depends)
163                 throws ResolutionPlugInException {
164                 log.debug("Resolving attribute: (" + getId() + ")");
165                 Set results = new HashSet();
166                 if (!connectorDependencyIds.isEmpty()) {
167                         results.addAll(Arrays.asList(getValuesFromConnectors(depends)));
168                 }
169
170                 if (!attributeDependencyIds.isEmpty()) {
171                         results.addAll(Arrays.asList(getValuesFromAttributes(depends)));
172                 }
173
174                 if (lifeTime != -1) {
175                         attribute.setLifetime(lifeTime);
176                 }
177
178                 if (smartScope != null) {
179                         attribute.registerValueHandler(new ScopedStringValueHandler(smartScope));
180                 }
181                 if (smartScope == null && valueHandler != null) {
182                         attribute.registerValueHandler(valueHandler);
183                 }
184                 
185                 Iterator resultsIt = results.iterator();
186                 while (resultsIt.hasNext()) {
187                         attribute.addValue(resultsIt.next());
188                 }
189                 attribute.setResolved();
190         }
191
192         protected Object[] getValuesFromAttributes(Dependencies depends) {
193
194                 Set results = new HashSet();
195
196                 Iterator attrDependIt = attributeDependencyIds.iterator();
197                 while (attrDependIt.hasNext()) {
198                         ResolverAttribute attribute = depends.getAttributeResolution((String) attrDependIt.next());
199                         if (attribute != null) {
200                                 log.debug("Found value(s) for attribute (" + getId() + ").");
201                                 for (Iterator iterator = attribute.getValues(); iterator.hasNext();) {
202                                         results.add(iterator.next());
203                                 }
204                         } else {
205                                 log.error(
206                                         "An attribute dependency of attribute (" + getId() + ") was not included in the dependency chain.");
207                         }
208                 }
209
210                 if (results.isEmpty()) {
211                         log.debug("An attribute dependency of attribute (" + getId() + ") supplied no values.");
212                 }
213                 return results.toArray();
214         }
215
216         protected Object[] getValuesFromConnectors(Dependencies depends) {
217
218                 Set results = new HashSet();
219
220                 Iterator connectorDependIt = connectorDependencyIds.iterator();
221                 while (connectorDependIt.hasNext()) {
222                         Attributes attrs = depends.getConnectorResolution((String) connectorDependIt.next());
223                         if (attrs != null) {
224                                 Attribute attr = attrs.get(connectorMapping);
225                                 if (attr != null) {
226                                         log.debug("Found value(s) for attribute (" + getId() + ").");
227                                         try {
228                                                 NamingEnumeration valuesEnum = attr.getAll();
229                                                 while (valuesEnum.hasMore()) {
230                                                         results.add(valuesEnum.next());
231                                                 }
232                                         } catch (NamingException e) {
233                                                 log.error(
234                                                         "An problem was encountered resolving the dependencies of attribute ("
235                                                                 + getId()
236                                                                 + "): "
237                                                                 + e);
238                                         }
239                                 }
240                         }
241                 }
242
243                 if (results.isEmpty()) {
244                         log.debug("A connector dependency of attribute (" + getId() + ") supplied no values.");
245                 }
246                 return results.toArray();
247         }
248 }