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16 package org.apache.cocoon.forms.datatype;
17
18 import java.util.ArrayList  ;
19 import java.util.HashMap ;
20 import java.util.Iterator ;
21 import java.util.List ;
22 import java.util.Locale ;
23
24 import org.apache.avalon.framework.service.ServiceException;
25 import org.apache.avalon.framework.service.ServiceManager;
26 import org.apache.avalon.framework.service.Serviceable;
27 import org.apache.cocoon.forms.FormsConstants;
28 import org.apache.cocoon.forms.datatype.convertor.Convertor;
29 import org.apache.cocoon.forms.datatype.convertor.DefaultFormatCache;
30 import org.apache.cocoon.xml.AttributesImpl;
31 import org.apache.cocoon.xml.XMLUtils;
32 import org.xml.sax.ContentHandler ;
33 import org.xml.sax.SAXException ;
34 import org.apache.excalibur.xml.sax.XMLizable;
35
36
39 public abstract class AbstractJavaSelectionList implements JavaSelectionList,
40 Serviceable {
41
42 protected Datatype datatype;
43 protected ServiceManager manager;
44
45 private HashMap attributes;
46 private List items;
47 private boolean nullable;
48 private boolean rebuild;
49
50 public AbstractJavaSelectionList() {
51 this.items = new ArrayList ();
52 this.rebuild = true;
53 }
54
55 public void service(ServiceManager manager) throws ServiceException {
56 this.manager = manager;
57 }
58
59 public String getAttribute(String name) {
60 if (this.attributes == null) {
61 return null;
62 }
63 return (String ) this.attributes.get(name);
64 }
65
66 public void removeAttribute(String name) {
67 if (this.attributes != null) {
68 this.attributes.remove(name);
69 }
70 }
71
72 public void setAttribute(String name, String value) {
73 if (this.attributes == null) {
74 this.attributes = new HashMap ();
75 }
76 this.attributes.put(name, value);
77 }
78
79 public boolean isNullable() {
80 return this.nullable;
81 }
82
83 public void setDatatype(Datatype datatype) {
84 this.datatype = datatype;
85 }
86
87 public void setNullable(boolean nullable) {
88 this.nullable = nullable;
89 }
90
91 public Datatype getDatatype() {
92 return this.datatype;
93 }
94
95
98 public void markForRebuild() {
99 this.rebuild = true;
100 }
101
102 public void generateSaxFragment(ContentHandler contentHandler, Locale locale)
103 throws SAXException {
104 if (this.rebuild) {
105 try {
106 this.items.clear();
107 this.rebuild = build();
108 } catch (Exception e) {
109 e.printStackTrace();
110 }
111 }
112
113 Convertor.FormatCache formatCache = new DefaultFormatCache();
114 contentHandler.startElement(FormsConstants.INSTANCE_NS, SELECTION_LIST_EL, FormsConstants.INSTANCE_PREFIX_COLON + SELECTION_LIST_EL, XMLUtils.EMPTY_ATTRIBUTES);
115
116 if (this.nullable) {
117 AttributesImpl voidAttrs = new AttributesImpl();
118 voidAttrs.addCDATAAttribute("value", "");
119 contentHandler.startElement(FormsConstants.INSTANCE_NS, ITEM_EL, FormsConstants.INSTANCE_PREFIX_COLON + ITEM_EL, voidAttrs);
120 contentHandler.endElement(FormsConstants.INSTANCE_NS, ITEM_EL, FormsConstants.INSTANCE_PREFIX_COLON + ITEM_EL);
121 }
122
123 Iterator itemIt = items.iterator();
124 while (itemIt.hasNext()) {
125 SelectionListItem item = (SelectionListItem) itemIt.next();
126 item.generateSaxFragment(contentHandler, locale, formatCache);
127 }
128
129 contentHandler.endElement(FormsConstants.INSTANCE_NS, SELECTION_LIST_EL, FormsConstants.INSTANCE_PREFIX_COLON + SELECTION_LIST_EL);
130 }
131
132
137 protected abstract boolean build() throws Exception ;
138
139
148 protected void addItem(Object value, String label) {
149 this.items.add(new SelectionListItem(value, label));
150 }
151
152
162 protected void addItem(Object value, XMLizable label) {
163 this.items.add(new SelectionListItem(value, label));
164 }
165
166 protected List getItems() {
167 return this.items;
168 }
169
170 private final class SelectionListItem {
171 private final Object value;
172
173 private final Object label;
174
175 public SelectionListItem(Object value, String label) {
176 this.value = value;
177 this.label = label;
178 }
179
180 public SelectionListItem(Object value, XMLizable label) {
181 this.value = value;
182 this.label = label;
183 }
184
185 public Object getValue() {
186 return value;
187 }
188
189 public void generateSaxFragment(ContentHandler contentHandler,
190 Locale locale, Convertor.FormatCache formatCache)
191 throws SAXException {
192 String stringValue;
193 if (this.value == null) {
194 stringValue = "";
195 } else {
196 stringValue = datatype.getConvertor().convertToString(this.value, locale, formatCache);
197 }
198
199 AttributesImpl attrs = new AttributesImpl();
200 attrs.addCDATAAttribute("value", stringValue);
201 contentHandler.startElement(FormsConstants.INSTANCE_NS, ITEM_EL, FormsConstants.INSTANCE_PREFIX_COLON + ITEM_EL, attrs);
202 contentHandler.startElement(FormsConstants.INSTANCE_NS, LABEL_EL, FormsConstants.INSTANCE_PREFIX_COLON + LABEL_EL, XMLUtils.EMPTY_ATTRIBUTES);
203 if (this.label == null) {
204 contentHandler.characters(stringValue.toCharArray(), 0, stringValue.length());
205 } else if (this.label instanceof XMLizable) {
206 ((XMLizable) this.label).toSAX(contentHandler);
207 } else {
208 String stringLabel = (String ) this.label;
209 contentHandler.characters(stringLabel.toCharArray(), 0, stringLabel.length());
210 }
211 contentHandler.endElement(FormsConstants.INSTANCE_NS, LABEL_EL, FormsConstants.INSTANCE_PREFIX_COLON + LABEL_EL);
212 contentHandler.endElement(FormsConstants.INSTANCE_NS, ITEM_EL, FormsConstants.INSTANCE_PREFIX_COLON + ITEM_EL);
213 }
214 }
215 }
216 |
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