Initial revision

From-SVN: r104578

libjava/classpath/javax/xml/stream/util/EventReaderDelegate.java

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+/* EventReaderDelegate.java -- 
+   Copyright (C) 2005  Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package javax.xml.stream.util;
+
+import java.util.NoSuchElementException;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLEventReader;
+import javax.xml.stream.events.XMLEvent;
+
+/**
+ * Base class for event reader filters.
+ */
+public class EventReaderDelegate
+  implements XMLEventReader
+{
+
+  private XMLEventReader parent;
+
+  /**
+   * Constructs an empty filter with no parent set.
+   */
+  public EventReaderDelegate()
+  {
+  }
+
+  /**
+   * Constructs an empty filter with the given parent.
+   */
+  public EventReaderDelegate(XMLEventReader reader)
+  {
+    parent = reader;
+  }
+
+  /**
+   * Sets the parent.
+   */
+  public void setParent(XMLEventReader reader)
+  {
+    parent = reader;
+  }
+
+  /**
+   * Returns the parent.
+   */
+  public XMLEventReader getParent()
+  {
+    return parent;
+  }
+
+  public XMLEvent next()
+    throws XMLStreamException
+  {
+    if (parent != null)
+      return parent.next();
+    throw new NoSuchElementException();
+  }
+
+  public boolean hasNext()
+    throws XMLStreamException
+  {
+    if (parent != null)
+      return parent.hasNext();
+    return false;
+  }
+
+  public XMLEvent peek()
+    throws XMLStreamException
+  {
+    if (parent != null)
+      return parent.peek();
+    return null;
+  }
+
+  public String getElementText()
+    throws XMLStreamException
+  {
+    if (parent != null)
+      return parent.getElementText();
+    throw new XMLStreamException();
+  }
+
+  public XMLEvent nextTag()
+    throws XMLStreamException
+  {
+    if (parent != null)
+      return parent.nextTag();
+    throw new XMLStreamException();
+  }
+
+  public Object getProperty(String name)
+    throws IllegalArgumentException
+  {
+    if (parent != null)
+      return parent.getProperty(name);
+    throw new IllegalArgumentException(name);
+  }
+
+}
+