Source Code Cross Referenced for MultiValueJXPathBindingBuilder.java in  » Content-Management-System » apache-lenya-2.0 » org » apache » cocoon » forms » binding » Java Source Code / Java DocumentationJava Source Code and Java Documentation

001:        /*
002:         * Licensed to the Apache Software Foundation (ASF) under one or more
003:         * contributor license agreements.  See the NOTICE file distributed with
004:         * this work for additional information regarding copyright ownership.
005:         * The ASF licenses this file to You under the Apache License, Version 2.0
006:         * (the "License"); you may not use this file except in compliance with
007:         * the License.  You may obtain a copy of the License at
008:         *
009:         *      http://www.apache.org/licenses/LICENSE-2.0
010:         *
011:         * Unless required by applicable law or agreed to in writing, software
012:         * distributed under the License is distributed on an "AS IS" BASIS,
013:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014:         * See the License for the specific language governing permissions and
015:         * limitations under the License.
016:         */
017:        package org.apache.cocoon.forms.binding;
018:
019:        import java.util.Locale;
020:
021:        import org.apache.cocoon.forms.FormsConstants;
022:        import org.apache.cocoon.forms.datatype.convertor.Convertor;
023:        import org.apache.cocoon.forms.util.DomHelper;
024:        import org.apache.cocoon.i18n.I18nUtils;
025:
026:        import org.w3c.dom.Element;
027:
028:        /**
029:         * A simple multi field binding that will replace (i.e. delete then re-add all) its
030:         * content.
031:         * <pre><code>
032:         * &lt;fb:multi-value id="<i>widget-id</i>"
033:         *   parent-path="<i>xpath-expression</i>"
034:         *   row-path="<i>xpath-expression</i>"&gt;
035:         *   &lt;!-- optional child binding to be executed upon 'save' of changed value --&gt;
036:         *   &lt;fb:on-update&gt;
037:         *     &lt;!-- any childbinding --&gt;
038:         *   &lt;/fb:on-update&gt;
039:         * &lt;/fb:multi-value&gt;
040:         * </code></pre>
041:         *
042:         * @version $Id: MultiValueJXPathBindingBuilder.java 517733 2007-03-13 15:37:22Z vgritsenko $
043:         */
044:        public class MultiValueJXPathBindingBuilder extends
045:                JXPathBindingBuilderBase {
046:
047:            public JXPathBindingBase buildBinding(Element bindingElem,
048:                    JXPathBindingManager.Assistant assistant)
049:                    throws BindingException {
050:
051:                try {
052:                    CommonAttributes commonAtts = JXPathBindingBuilderBase
053:                            .getCommonAttributes(bindingElem);
054:
055:                    String multiValueId = DomHelper.getAttribute(bindingElem,
056:                            "id", null);
057:                    String parentPath = DomHelper.getAttribute(bindingElem,
058:                            "parent-path", null);
059:                    String rowPath = DomHelper.getAttribute(bindingElem,
060:                            "row-path", null);
061:
062:                    Convertor convertor = null;
063:                    Locale convertorLocale = Locale.US;
064:                    Element convertorEl = DomHelper.getChildElement(
065:                            bindingElem, FormsConstants.DEFINITION_NS,
066:                            "convertor");
067:                    if (convertorEl != null) {
068:                        String datatype = DomHelper.getAttribute(convertorEl,
069:                                "datatype", null);
070:                        String localeStr = DomHelper.getAttribute(convertorEl,
071:                                "locale", null);
072:                        if (localeStr != null) {
073:                            convertorLocale = I18nUtils.parseLocale(localeStr);
074:                        }
075:
076:                        convertor = assistant.getDatatypeManager()
077:                                .createConvertor(datatype, convertorEl);
078:                    }
079:
080:                    MultiValueJXPathBinding existingBinding = (MultiValueJXPathBinding) assistant
081:                            .getContext().getSuperBinding();
082:                    JXPathBindingBase[] existingBindings = new JXPathBindingBase[0];
083:                    if (existingBinding != null) {
084:                        commonAtts = JXPathBindingBuilderBase
085:                                .mergeCommonAttributes(existingBinding
086:                                        .getCommonAtts(), commonAtts);
087:                        existingBindings = existingBinding.getUpdateBinding()
088:                                .getChildBindings();
089:
090:                        if (multiValueId == null)
091:                            multiValueId = existingBinding.getId();
092:                        if (parentPath == null)
093:                            parentPath = existingBinding.getMultiValuePath();
094:                        if (rowPath == null)
095:                            rowPath = existingBinding.getRowPath();
096:
097:                        if (convertor == null) {
098:                            convertor = existingBinding.getConvertor();
099:                            convertorLocale = existingBinding.getLocale();
100:                        }
101:                    }
102:
103:                    Element updateWrapElement = DomHelper.getChildElement(
104:                            bindingElem, BindingManager.NAMESPACE, "on-update");
105:                    JXPathBindingBase[] updateBindings = assistant
106:                            .makeChildBindings(updateWrapElement,
107:                                    existingBindings);
108:
109:                    return new MultiValueJXPathBinding(commonAtts,
110:                            multiValueId, parentPath, rowPath, updateBindings,
111:                            convertor, convertorLocale);
112:                } catch (BindingException e) {
113:                    throw e;
114:                } catch (Exception e) {
115:                    throw new BindingException(
116:                            "Error building multi value binding", e, DomHelper
117:                                    .getLocationObject(bindingElem));
118:                }
119:            }
120:        }