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Java > Open Source Codes > org > apache > fop > render > ps > extensions > AbstractPSExtensionObject


1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
7  * the License. You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17
18 /* $Id: AbstractPSExtensionObject.java 426576 2006-07-28 15:44:37Z jeremias $ */
19  
20 package org.apache.fop.render.ps.extensions;
21
22 // FOP
23 import org.apache.fop.apps.FOPException;
24 import org.apache.fop.fo.FONode;
25 import org.apache.fop.fo.PropertyList;
26 import org.apache.fop.fo.ValidationException;
27 import org.apache.fop.fo.extensions.ExtensionAttachment;
28 import org.xml.sax.Attributes JavaDoc;
29 import org.xml.sax.Locator JavaDoc;
30
31 /**
32  * Base class for the PostScript-specific extension elements.
33  */
34 public abstract class AbstractPSExtensionObject extends FONode {
35
36     private PSSetupCode setupCode = new PSSetupCode();
37     
38     /**
39      * @see org.apache.fop.fo.FONode#FONode(FONode)
40      */
41     public AbstractPSExtensionObject(FONode parent) {
42         super(parent);
43     }
44
45     /**
46      * @see org.apache.fop.fo.FONode#validateChildNode(Locator, String, String)
47      * here, blocks XSL FO's from having non-FO parents.
48      */
49     protected void validateChildNode(Locator JavaDoc loc, String JavaDoc nsURI, String JavaDoc localName)
50                 throws ValidationException {
51         if (FO_URI.equals(nsURI)) {
52             invalidChildError(loc, nsURI, localName);
53         }
54     }
55
56     /** @see org.apache.fop.fo.FONode */
57     protected void addCharacters(char[] data, int start, int length,
58                                  PropertyList pList, Locator JavaDoc locator) {
59         if (setupCode.getContent() != null) {
60             StringBuffer JavaDoc sb = new StringBuffer JavaDoc(setupCode.getContent());
61             sb.append(data, start, length - start);
62             setupCode.setContent(sb.toString());
63         } else {
64             setupCode.setContent(new String JavaDoc(data, start, length - start));
65         }
66     }
67
68     /** @see org.apache.fop.fo.FONode#getNamespaceURI() */
69     public String JavaDoc getNamespaceURI() {
70         return PSExtensionElementMapping.NAMESPACE;
71     }
72     
73     /**@see org.apache.fop.fo.FONode#getNormalNamespacePrefix() */
74     public String JavaDoc getNormalNamespacePrefix() {
75         return "fox";
76     }
77
78     /** @see org.apache.fop.fo.FONode#processNode */
79     public void processNode(String JavaDoc elementName, Locator JavaDoc locator,
80                             Attributes JavaDoc attlist, PropertyList propertyList)
81                                 throws FOPException {
82         String JavaDoc name = attlist.getValue("name");
83         if (name != null && name.length() > 0) {
84             setupCode.setName(name);
85         }
86     }
87
88     /** @see org.apache.fop.fo.FONode#endOfNode() */
89     protected void endOfNode() throws FOPException {
90         super.endOfNode();
91         String JavaDoc s = setupCode.getContent();
92         if (s == null || s.length() == 0) {
93             missingChildElementError("#PCDATA");
94         }
95     }
96     
97     /** @see org.apache.fop.fo.FONode#getExtensionAttachment() */
98     public ExtensionAttachment getExtensionAttachment() {
99         return this.setupCode;
100     }
101
102 }
103
104
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