1 files changed, 103 insertions, 0 deletions
diff --git a/bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/xsect/URIDereferncerAdapter.java b/bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/xsect/URIDereferncerAdapter.java
new file mode 100644
index 00000000..c94937be
--- /dev/null
+++ b/bkucommon/src/main/java/at/gv/egiz/bku/slcommands/impl/xsect/URIDereferncerAdapter.java
@@ -0,0 +1,103 @@
+/*
+* Copyright 2008 Federal Chancellery Austria and
+* Graz University of Technology
+*
+* Licensed 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 at.gv.egiz.bku.slcommands.impl.xsect;
+
+import iaik.xml.crypto.utils.URIDereferencerImpl;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
+
+import javax.xml.crypto.Data;
+import javax.xml.crypto.OctetStreamData;
+import javax.xml.crypto.URIDereferencer;
+import javax.xml.crypto.URIReference;
+import javax.xml.crypto.URIReferenceException;
+import javax.xml.crypto.XMLCryptoContext;
+
+import at.gv.egiz.bku.utils.urldereferencer.StreamData;
+import at.gv.egiz.bku.utils.urldereferencer.URLDereferencer;
+import at.gv.egiz.bku.utils.urldereferencer.URLDereferencerContext;
+
+/**
+ * An URIDereferencer implementation that uses an {@link URLDereferencer} to
+ * dereference.
+ * 
+ * @author mcentner
+ */
+public class URIDereferncerAdapter implements URIDereferencer {
+
+  /**
+   * The context for dereferencing.
+   */
+  protected URLDereferencerContext urlDereferencerContext;
+
+  /**
+   * Creates a new URIDereferencerAdapter instance with the given
+   * <code>urlDereferencerContext</code>.
+   * 
+   * @param urlDereferencerContext the context to be used for dereferencing
+   */
+  public URIDereferncerAdapter(URLDereferencerContext urlDereferencerContext) {
+    super();
+    this.urlDereferencerContext = urlDereferencerContext;
+  }
+
+  /* (non-Javadoc)
+   * @see javax.xml.crypto.URIDereferencer#dereference(javax.xml.crypto.URIReference, javax.xml.crypto.XMLCryptoContext)
+   */
+  @Override
+  public Data dereference(URIReference uriReference, XMLCryptoContext context)
+      throws URIReferenceException {
+    
+    String uriString = uriReference.getURI();
+    if (uriString == null) {
+      return null;
+    }
+    
+    URI uri;
+    try {
+      uri = new URI(uriString);
+    } catch (URISyntaxException e) {
+      throw new URIReferenceException(e.getMessage(), e);
+    }
+    
+    if (uri.isAbsolute()) {
+
+      URLDereferencer dereferencer = URLDereferencer.getInstance();
+      StreamData streamData;
+      try {
+        streamData = dereferencer.dereference(uriString, urlDereferencerContext);
+      } catch (IOException e) {
+        throw new URIReferenceException(e.getMessage(), e);
+      }
+      return new OctetStreamData(streamData.getStream(), uriString, streamData.getContentType());
+      
+    } else {
+      
+      URIDereferencer uriDereferencer = context.getURIDereferencer();
+      if (uriDereferencer == null || uriDereferencer == this) {
+        uriDereferencer = new URIDereferencerImpl();
+      }
+        
+      return uriDereferencer.dereference(uriReference, context);
+      
+    }
+    
+  }
+
+}