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16 package org.apache.cocoon.forms.binding;
17
18 import java.util.ArrayList  ;
19 import java.util.Collections ;
20 import java.util.Iterator ;
21 import java.util.LinkedList ;
22 import java.util.List ;
23 import java.util.Locale ;
24
25 import org.apache.avalon.framework.logger.Logger;
26 import org.apache.cocoon.forms.datatype.convertor.Convertor;
27 import org.apache.cocoon.forms.datatype.convertor.ConversionResult;
28 import org.apache.cocoon.forms.formmodel.Widget;
29 import org.apache.commons.jxpath.JXPathContext;
30 import org.apache.commons.jxpath.Pointer;
31
32
38 public class MultiValueJXPathBinding extends JXPathBindingBase {
39
40 private final String multiValueId;
41 private final String multiValuePath;
42 private final String rowPath;
43 private final JXPathBindingBase updateBinding;
44 private final Convertor convertor;
45 private final Locale convertorLocale;
46
47 public MultiValueJXPathBinding(
48 JXPathBindingBuilderBase.CommonAttributes commonAtts, String multiValueId,
49 String multiValuePath, String rowPath,
50 JXPathBindingBase[] updateBindings, Convertor convertor, Locale convertorLocale) {
51 super(commonAtts);
52 this.multiValueId = multiValueId;
53 this.multiValuePath = multiValuePath;
54 this.rowPath = rowPath;
55 this.updateBinding = new ComposedJXPathBindingBase(JXPathBindingBuilderBase.CommonAttributes.DEFAULT, updateBindings);
56 this.convertor = convertor;
57 this.convertorLocale = convertorLocale;
58 }
59
60 public String getId() { return multiValueId; }
61 public String getMultiValuePath() { return multiValuePath; }
62 public String getRowPath() { return rowPath; }
63 public ComposedJXPathBindingBase getUpdateBinding() { return (ComposedJXPathBindingBase)updateBinding; }
64 public Convertor getConvertor() { return convertor; }
65 public Locale getLocale() { return convertorLocale; }
66
67 public void doLoad(Widget frmModel, JXPathContext jctx) throws BindingException {
68 Widget widget = selectWidget(frmModel,this.multiValueId);
69 if (widget == null) {
70 throw new BindingException("The widget with the ID [" + this.multiValueId
71 + "] referenced in the binding does not exist in the form definition.");
72 }
73
74 Pointer ptr = jctx.getPointer(this.multiValuePath);
76 if (ptr.getNode() != null) {
77
79 JXPathContext multiValueContext = jctx.getRelativeContext(ptr);
80 Iterator rowPointers = multiValueContext.iterate(this.rowPath);
82
83 LinkedList list = new LinkedList ();
84
85 while (rowPointers.hasNext()) {
86 Object value = rowPointers.next();
87
88 if (value != null && convertor != null) {
89 if (value instanceof String ) {
90 ConversionResult conversionResult = convertor.convertFromString((String )value, convertorLocale, null);
91 if (conversionResult.isSuccessful())
92 value = conversionResult.getResult();
93 else
94 value = null;
95 } else {
96 getLogger().warn("Convertor ignored on backend-value which isn't of type String.");
97 }
98 }
99
100 list.add(value);
101 }
102
103 widget.setValue(list.toArray());
104 }
105
106 if (getLogger().isDebugEnabled())
107 getLogger().debug("done loading values " + toString());
108 }
109
110 public void doSave(Widget frmModel, JXPathContext jctx) throws BindingException {
111 Widget widget = selectWidget(frmModel,this.multiValueId);
112 Object [] values = (Object [])widget.getValue();
113
114 JXPathContext multiValueContext = jctx.getRelativeContext(jctx.createPath(this.multiValuePath));
115
116
118
122 Iterator rowPointers = multiValueContext.iteratePointers(this.rowPath);
123 List l = new ArrayList ();
124 while( rowPointers.hasNext() )
125 {
126 Pointer p = (Pointer)rowPointers.next();
127 l.add(p.asPath());
128 }
129 Collections.sort(l);
130 for( int i = l.size()-1; i >= 0; i-- )
131 {
132 multiValueContext.removePath((String )l.get(i));
133 }
134
135 boolean update = false;
136
137 if (values != null) {
138 for (int i = 0; i < values.length; i++) {
140 String path = this.rowPath + '[' + (i+1) + ']';
141 Pointer rowPtr = multiValueContext.createPath(path);
142
143 Object value = values[i];
144 if (value != null && convertor != null) {
145 value = convertor.convertToString(value, convertorLocale, null);
146 }
147
148 rowPtr.setValue(value);
149 }
150
151 this.updateBinding.saveFormToModel(frmModel, multiValueContext);
153
154 update = true;
155 }
156
157
158 if (getLogger().isDebugEnabled()) {
159 getLogger().debug("done saving " + toString() + " -- on-update == " + update);
160 }
161
162
163
164 }
165
166 public String toString() {
167 return "MultiValueJXPathBinding [widget=" + this.multiValueId + ", xpath=" + this.multiValuePath + "]";
168 }
169
170 public void enableLogging(Logger logger) {
171 super.enableLogging(logger);
172 this.updateBinding.enableLogging(logger);
173 }
174 }
175 |
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