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.formmodel;
18:
19: import org.apache.cocoon.forms.FormsException;
20: import org.apache.cocoon.forms.formmodel.library.Library;
21: import org.apache.cocoon.forms.util.DomHelper;
22:
23: import org.w3c.dom.Element;
24:
25: /**
26: * @version $Id: ImportDefinitionBuilder.java 449149 2006-09-23 03:58:05Z crossley $
27: */
28: public class ImportDefinitionBuilder extends
29: AbstractWidgetDefinitionBuilder {
30:
31: public static final String PREFIX_ATTRIBUTE = "prefix";
32: public static final String URI_ATTRIBUTE = "uri";
33:
34: /**
35: * Imports a new library
36: */
37: public WidgetDefinition buildWidgetDefinition(Element widgetElement)
38: throws Exception {
39: if (this .context == null
40: || this .context.getLocalLibrary() == null) {
41: throw new FormsException(
42: "Import statement seen and context is empty.",
43: DomHelper.getLocationObject(widgetElement));
44: }
45:
46: Library lib = this .context.getLocalLibrary();
47: String prefix = DomHelper.getAttribute(widgetElement,
48: PREFIX_ATTRIBUTE);
49: String uri = DomHelper.getAttribute(widgetElement,
50: URI_ATTRIBUTE);
51:
52: if (!lib.includeAs(prefix, uri)) {
53: throw new FormsException(
54: "Import statement did not succeed (probably used ':' in the prefix?).",
55: DomHelper.getLocationObject(widgetElement));
56: }
57:
58: return null;
59: }
60: }
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