1 /*
   2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.xml.internal.bind.v2.runtime;
  27 
  28 import java.io.IOException;
  29 
  30 import javax.xml.namespace.QName;
  31 import javax.xml.stream.XMLStreamException;
  32 
  33 import com.sun.istack.internal.NotNull;
  34 import com.sun.xml.internal.bind.api.AccessorException;
  35 
  36 import org.xml.sax.SAXException;
  37 
  38 /**
  39  * {@link Transducer} that delegates to another {@link Transducer}.
  40  *
  41  * @author Kohsuke Kawaguchi
  42  */
  43 public abstract class FilterTransducer<T> implements Transducer<T> {
  44     protected final Transducer<T> core;
  45 
  46     protected FilterTransducer(Transducer<T> core) {
  47         this.core = core;
  48     }
  49 
  50     public final boolean isDefault() {
  51         // this must be used as a decorating transducer,
  52         // so it may never be default.
  53         return false;
  54     }
  55 
  56     public boolean useNamespace() {
  57         return core.useNamespace();
  58     }
  59 
  60     public void declareNamespace(T o, XMLSerializer w) throws AccessorException {
  61         core.declareNamespace(o, w);
  62     }
  63 
  64     public @NotNull CharSequence print(@NotNull T o) throws AccessorException {
  65         return core.print(o);
  66     }
  67 
  68     public T parse(CharSequence lexical) throws AccessorException, SAXException {
  69         return core.parse(lexical);
  70     }
  71 
  72     public void writeText(XMLSerializer w, T o, String fieldName) throws IOException, SAXException, XMLStreamException, AccessorException {
  73         core.writeText(w, o, fieldName);
  74     }
  75 
  76     public void writeLeafElement(XMLSerializer w, Name tagName, T o, String fieldName) throws IOException, SAXException, XMLStreamException, AccessorException {
  77         core.writeLeafElement(w,tagName,o,fieldName);
  78     }
  79 
  80     public QName getTypeName(T instance) {
  81         return null;
  82     }
  83 }