1 files changed, 96 insertions, 0 deletions
diff --git a/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URIResolverAdapter.java b/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URIResolverAdapter.java
new file mode 100644
index 00000000..2d11010e
--- /dev/null
+++ b/utils/src/main/java/at/gv/egiz/bku/utils/urldereferencer/URIResolverAdapter.java
@@ -0,0 +1,96 @@
+/*
+* 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.utils.urldereferencer;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
+
+import javax.xml.transform.Source;
+import javax.xml.transform.TransformerException;
+import javax.xml.transform.URIResolver;
+import javax.xml.transform.stream.StreamSource;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+/**
+ * Adapter to make the Urldereferencer work as URIResolver for
+ * Stylesheettransforms.
+ * 
+ * @author wbauer
+ * 
+ */
+public class URIResolverAdapter implements URIResolver {
+  
+  private static Log log = LogFactory.getLog(URIResolverAdapter.class);
+
+  private URLDereferencer urlDereferencer;
+  private URLDereferencerContext ctx;
+
+  /**
+   * 
+   * @param deferecencer
+   *          must not be null
+   * @param ctx may be null
+   */
+  public URIResolverAdapter(URLDereferencer deferecencer,
+      URLDereferencerContext ctx) {
+    if (deferecencer == null) {
+      throw new NullPointerException("Urlderefencer must not be set to null");
+    }
+    this.urlDereferencer = deferecencer;
+    this.ctx = ctx;
+  }
+
+  @Override
+  public Source resolve(String href, String base) throws TransformerException {
+    log.debug("Resolving href: "+href+" base: "+base);
+    try {
+      URI baseUri = null;
+      URI hrefUri = new URI(href);
+      if (base != null) {
+        baseUri = new URI(base);
+      }
+      URI abs;
+      if (baseUri != null) {
+        abs = baseUri.resolve(hrefUri);
+      } else {
+        abs = hrefUri;
+      }
+      if (!abs.isAbsolute()) {
+        throw new TransformerException("Only absolute URLs are supported");
+      }
+      return new StreamSource(urlDereferencer.dereference(abs.toString(), ctx)
+          .getStream());
+    } catch (URISyntaxException e) {
+      throw new TransformerException("Cannot resolve URI: base:" + base
+          + " href:" + href, e);
+    } catch (IOException iox) {
+      throw new TransformerException("Cannot resolve URI: base:" + base
+          + " href:" + href, iox);
+    }
+  }
+
+  public URLDereferencerContext getCtx() {
+    return ctx;
+  }
+
+  public void setCtx(URLDereferencerContext ctx) {
+    this.ctx = ctx;
+  }
+}