/**
* Adds the current header to the table model calling addColumn in the parent table tag. This
* method should be called only at first iteration.
*
* @param tableTag parent table tag
* @throws DecoratorInstantiationException for error during column decorator instantiation
* @throws ObjectLookupException for errors in looking up values
*/
private void addHeaderToTable(TableTag tableTag)
throws DecoratorInstantiationException, ObjectLookupException {
// don't modify "title" directly
String evalTitle = this.title;
// title has precedence over titleKey
if (evalTitle == null && (this.titleKey != null || this.property != null)) {
// handle title i18n
evalTitle =
tableTag
.getProperties()
.geResourceProvider()
.getResource(this.titleKey, this.property, tableTag, this.pageContext);
}
HeaderCell headerCell = new HeaderCell();
headerCell.setHeaderAttributes((HtmlAttributeMap) this.headerAttributeMap.clone());
headerCell.setHtmlAttributes((HtmlAttributeMap) this.attributeMap.clone());
headerCell.setTitle(evalTitle);
headerCell.setSortable(this.sortable);
List<DisplaytagColumnDecorator> decorators = new ArrayList<DisplaytagColumnDecorator>();
// handle multiple chained decorators, whitespace separated
if (StringUtils.isNotEmpty(this.decorator)) {
String[] decoratorNames = StringUtils.split(this.decorator);
for (int j = 0; j < decoratorNames.length; j++) {
decorators.add(
tableTag
.getProperties()
.getDecoratorFactoryInstance()
.loadColumnDecorator(this.pageContext, decoratorNames[j]));
}
}
// "special" decorators
if (this.escapeXml) {
decorators.add(EscapeXmlColumnDecorator.INSTANCE);
}
if (this.autolink) {
decorators.add(AutolinkColumnDecorator.INSTANCE);
}
if (StringUtils.isNotBlank(this.format)) {
decorators.add(
new MessageFormatColumnDecorator(this.format, tableTag.getProperties().getLocale()));
}
headerCell.setColumnDecorators(
decorators.toArray(new DisplaytagColumnDecorator[decorators.size()]));
headerCell.setBeanPropertyName(this.property);
headerCell.setShowNulls(this.nulls);
headerCell.setMaxLength(this.maxLength);
headerCell.setMaxWords(this.maxWords);
headerCell.setGroup(this.group);
headerCell.setSortProperty(this.sortProperty);
headerCell.setTotaled(this.totaled);
Comparator<Object> headerComparator =
(comparator != null) ? comparator : tableTag.getProperties().getDefaultComparator();
headerCell.setComparator(headerComparator);
headerCell.setDefaultSortOrder(this.defaultorder);
headerCell.setSortName(this.sortName);
// href and parameter, create link
if (this.href != null) {
Href colHref;
// empty base url, use href with parameters from parent table
if (StringUtils.isEmpty(this.href.getBaseUrl())) {
colHref = (Href) tableTag.getBaseHref().clone();
} else {
colHref = (Href) this.href.clone();
}
if (this.paramId != null) {
// parameter value is in a different object than the iterated one
if (this.paramName != null || this.paramScope != null) {
// create a complete string for compatibility with previous version before expression
// evaluation.
// this approach is optimized for new expressions, not for previous property/scope
// parameters
StringBuffer expression = new StringBuffer();
// append scope
if (StringUtils.isNotBlank(this.paramScope)) {
expression.append(this.paramScope).append("Scope.");
}
// base bean name
if (this.paramId != null) {
expression.append(this.paramName);
} else {
expression.append(tableTag.getName());
}
// append property
if (StringUtils.isNotBlank(this.paramProperty)) {
expression.append('.').append(this.paramProperty);
}
// evaluate expression.
// note the value is fixed, not based on any object created during iteration
// this is here for compatibility with the old version mainly
Object paramValue = tableTag.evaluateExpression(expression.toString());
// add parameter
colHref.addParameter(this.paramId, paramValue);
} else {
// set id
headerCell.setParamName(this.paramId);
// set property
headerCell.setParamProperty(this.paramProperty);
}
}
// sets the base href
headerCell.setHref(colHref);
}
tableTag.addColumn(headerCell);
if (log.isDebugEnabled()) {
log.debug("columnTag.addHeaderToTable() :: first iteration - adding header " + headerCell);
}
}
