/**
* Copyright 2005-2010 hdiv.org
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.hdiv.web.servlet.tags.form;
import javax.servlet.jsp.JspException;
import org.hdiv.dataComposer.IDataComposer;
import org.hdiv.web.util.TagUtils;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.servlet.tags.form.CheckboxesTag;
import org.springframework.web.servlet.tags.form.TagWriter;
/**
* Databinding-aware JSP tag for rendering multiple HTML '<code>input</code>'
* elements with a '<code>type</code>' of '<code>checkbox</code>'.
*
* <p>
* Intended to be used with a Collection as the {@link #getItems()} bound
* value}.
*
* @author Gorka Vicente
* @since HDIV 2.0.6
*/
public class CheckboxesTagHDIV extends CheckboxesTag {
private IDataComposer dataComposer;
/**
* Renders the '<code>input type="radio"</code>' element with the configured
* {@link #setItems(Object)} values. Marks the element as checked if the
* value matches the bound value.
*/
@Override
protected int writeTagContent(TagWriter tagWriter) throws JspException {
dataComposer = (IDataComposer) this.pageContext.getRequest().getAttribute(TagUtils.DATA_COMPOSER);
super.writeTagContent(tagWriter);
if (!isDisabled()) {
String hdivValue = dataComposer.compose(WebDataBinder.DEFAULT_FIELD_MARKER_PREFIX + getName(), "on", false);
// Write out the 'field was present' marker.
tagWriter.startTag("input");
tagWriter.writeAttribute("type", "hidden");
tagWriter.writeAttribute("name", WebDataBinder.DEFAULT_FIELD_MARKER_PREFIX + getName());
tagWriter.writeAttribute("value", hdivValue);
tagWriter.endTag();
}
return SKIP_BODY;
}
/**
* Render the '<code>input(checkbox)</code>' with the supplied value, marking the
* '<code>input</code>' element as 'checked' if the supplied value matches the
* bound value.
*/
@Override
protected void renderFromValue(Object item, Object value, TagWriter tagWriter) throws JspException {
String displayValue = convertToDisplayString(value);
dataComposer.compose(getName(), displayValue, true);
tagWriter.writeAttribute("value", displayValue);
if (isOptionSelected(value) || (value != item && isOptionSelected(item))) {
tagWriter.writeAttribute("checked", "checked");
}
}
/**
* Determines whether the supplied value matched the selected value
* through delegating to {@link SelectedValueComparatorHDIV#isSelected}.
*/
private boolean isOptionSelected(Object value) throws JspException {
return SelectedValueComparatorHDIV.isSelected(getBindStatus(), value);
}
}