[GNUJAXP-PATCH] javax.xml.parsers.DocumentBuilder#parse(...)

Index: DocumentBuilder.java
===================================================================
RCS file: /cvsroot/classpathx/jaxp/source/javax/xml/parsers/DocumentBuilder.java,v
retrieving revision 1.8
diff -u -r1.8 DocumentBuilder.java
--- DocumentBuilder.java	8 Feb 2002 18:51:10 -0000	1.8
+++ DocumentBuilder.java	15 Aug 2003 20:23:05 -0000
@@ -96,17 +96,30 @@
 	/**
 	 * Constructs an InputSource from the file, and invokes parse ().
 	 * The InputSource includes the URI for the file.
+   * @param file the file to parse
+   * @return the DOM representation of the xml document
+   * @exception IOException 
+   * @exception SAXException if parse errors occur
+   * @exception IllegalArgumentException if the file is null
 	 */
 	public Document parse (File file) 
 	throws SAXException, IOException
 	{
-	    InputSource	source;
-
-	    source = new InputSource (fileToURL (file));
-	    source.setByteStream (new FileInputStream(file));
-	    return parse (source);
+    if (file==null)
+      {
+        throw new IllegalArgumentException("File si 'null'");
+      }
+    InputSource	source;
+    
+    source = new InputSource (fileToURL (file));
+    source.setByteStream (new FileInputStream(file));
+    return parse (source);
 	}
-
+  
+  /**
+   * 
+   * @exception IllegalArgumentException if InputSource is null
+   */
 	public abstract Document parse(InputSource source) 
 		throws SAXException, IOException;
 
@@ -114,15 +127,28 @@
 	 * Avoid using this call; provide the system ID wherever possible.
 	 * System IDs are essential when parsers resolve relative URIs,
 	 * or provide diagnostics.
+   * @exception IllegalArgumentException if InputStream is null
 	 */
 	public Document parse(InputStream stream) 
 		throws SAXException, IOException {
+    if (stream==null)
+    {
+      throw new IllegalArgumentException("InputStream si 'null'");
+    }
 		return parse(new InputSource(stream));
 	} // parse()
 
+  /**
+   * 
+   * @exception IllegalArgumentException if InputStream is null
+   */
 	public Document parse(InputStream stream, String systemID) 
 		throws SAXException, IOException {
 
+    if (stream==null)
+      {
+        throw new IllegalArgumentException("InputStream si 'null'");
+      }
 		// Variables
 		InputSource	source;
 
@@ -135,11 +161,19 @@
 
 	} // parse()
 
+  /**
+   * 
+   * @exception IllegalArgumentException if the URI is null
+   */
 	public Document parse(String uri) 
 		throws SAXException, IOException {
+    if (uri==null)
+      {
+        throw new IllegalArgumentException("URI si 'null'");
+      }
 		return parse(new InputSource(uri));
 	} // parse()
-
+  
 	public abstract void setEntityResolver(EntityResolver resolver);
 
 	public abstract void setErrorHandler(ErrorHandler handler);