01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * 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: package org.apache.cocoon.forms.binding;
18:
19: import org.apache.cocoon.forms.util.DomHelper;
20:
21: import org.w3c.dom.Element;
22:
23: /**
24: * SetAttributeJXPathBindingBuilder provides a helper class for the Factory
25: * implemented in {@link JXPathBindingManager} that helps construct the
26: * actual {@link SetAttributeJXPathBinding} out of the configuration in the
27: * provided configElement which looks like:
28: * <pre><code>
29: * <fb:set-attribute name="<i>attribute-name to set to</i>"
30: * value="<i>attribute-value</i>"/>
31: * </code></pre>
32: *
33: * @version $Id: SetAttributeJXPathBindingBuilder.java 517733 2007-03-13 15:37:22Z vgritsenko $
34: */
35: public class SetAttributeJXPathBindingBuilder extends
36: JXPathBindingBuilderBase {
37:
38: /**
39: * Creates an instance of {@link SetAttributeJXPathBinding} according to
40: * the attributes of the provided bindingElm.
41: */
42: public JXPathBindingBase buildBinding(Element bindingElm,
43: JXPathBindingManager.Assistant assistant)
44: throws BindingException {
45:
46: try {
47: CommonAttributes commonAtts = JXPathBindingBuilderBase
48: .getCommonAttributes(bindingElm);
49:
50: String attName = DomHelper.getAttribute(bindingElm, "name",
51: null);
52: String attValue = DomHelper.getAttribute(bindingElm,
53: "value", null);
54:
55: // do inheritance
56: SetAttributeJXPathBinding otherBinding = (SetAttributeJXPathBinding) assistant
57: .getContext().getSuperBinding();
58: if (otherBinding != null) {
59: commonAtts = JXPathBindingBuilderBase
60: .mergeCommonAttributes(otherBinding
61: .getCommonAtts(), commonAtts);
62:
63: if (attName == null) {
64: attName = otherBinding.getId();
65: }
66: if (attValue == null) {
67: attValue = otherBinding.getValue();
68: }
69: }
70:
71: return new SetAttributeJXPathBinding(commonAtts, attName,
72: attValue);
73: } catch (BindingException e) {
74: throw e;
75: } catch (Exception e) {
76: throw new BindingException(
77: "Error building set-attribute binding", e,
78: DomHelper.getLocationObject(bindingElm));
79: }
80: }
81: }
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