1 files changed, 115 insertions, 0 deletions
diff --git a/utils/src/main/java/at/gv/egiz/dom/DOMUtils.java b/utils/src/main/java/at/gv/egiz/dom/DOMUtils.java
new file mode 100644
index 00000000..32c7c5e6
--- /dev/null
+++ b/utils/src/main/java/at/gv/egiz/dom/DOMUtils.java
@@ -0,0 +1,115 @@
+/*
+* 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.dom;
+
+import iaik.utils.Base64OutputStream;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Text;
+import org.w3c.dom.bootstrap.DOMImplementationRegistry;
+import org.w3c.dom.ls.DOMImplementationLS;
+
+public final class DOMUtils {
+
+  /**
+   * DOM Implementation.
+   */
+  private static String DOM_LS_3_0 = "LS 3.0";
+  
+  private static DOMImplementationLS domImplLS;
+  
+  private DOMUtils() {
+  }
+  
+  private static synchronized void ensureDOMImplementation() {
+    
+    if (domImplLS == null) {
+
+      DOMImplementationRegistry registry;
+      try {
+        registry = DOMImplementationRegistry.newInstance();
+      } catch (Exception e) {
+        throw new RuntimeException("Failed to get DOMImplementationRegistry.");
+      }
+
+      domImplLS = (DOMImplementationLS) registry.getDOMImplementation(DOM_LS_3_0);
+      if (domImplLS == null) {
+        throw new RuntimeException("Failed to get DOMImplementation " + DOM_LS_3_0);
+      }
+      
+    }
+    
+  }
+
+  public static DOMImplementationLS getDOMImplementationLS() {
+    
+    if (domImplLS == null) {
+      ensureDOMImplementation();
+    }
+    
+    return domImplLS;
+  }
+  
+  public static Document createDocument() {
+    
+    // This does not work with the Xerces-J version (2.6.2) included in Java 6
+    //document = ((DOMImplementation) domImplLS).createDocument(null, null, null);
+    // Therefore we have to employ the good old DocumentBuilderFactory
+    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
+    DocumentBuilder db;
+    try {
+      db = dbf.newDocumentBuilder();
+    } catch (ParserConfigurationException e) {
+      throw new RuntimeException(e);
+    }
+    return db.newDocument();
+       
+  }
+  
+  public static Text createBase64Text(byte[] bytes, Document doc) throws IOException {
+    
+    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+    Base64OutputStream base64OutputStream = new Base64OutputStream(outputStream);
+    base64OutputStream.write(bytes);
+    base64OutputStream.flush();
+    return doc.createTextNode(outputStream.toString("ASCII"));
+    
+  }
+  
+  public static Text createBase64Text(InputStream bytes, Document doc) throws IOException {
+    
+    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+    Base64OutputStream base64OutputStream = new Base64OutputStream(outputStream, new byte[] {0xa});
+
+    byte[] b = new byte[2^8];
+    for(int l; (l = bytes.read(b)) != -1;) {
+      base64OutputStream.write(b, 0, l);
+    }
+    
+    base64OutputStream.flush();
+    return doc.createTextNode(outputStream.toString("ASCII"));
+  }
+
+}