Dynamic attributes in a jsp tag
I want to have a tag with dynamic attributes, like simple html tags, eg something like this:
<tags:superTag dynamicAttribute1="value" someOtherAttribute="valueOfSomeOther"/>
And in my implementation of tag I want to have something like this:
public class DynamicAttributesTag {
private Map<String,String> dynamicAttributes;
public Map<String, String> getDynamicAttributes() {
return dynamicAttributes;
}
public void setDynamicAttributes(Map<String, String> dynamicAttributes) {
this.dynamicAttributes = dynamicAttributes;
}
@Override
protected int doTag() throws Exception {
for (Map.Entry<String, String> dynamicAttribute : dynamicAttributes.entrySet()) {
// do something
}
return 0;
}
}
I want to point out that these dynamic attributes are going to be written by hands in a jsp, not just passed as Map like ${someMap}
. So is there any way to achieve this?
You will have to enable dynamic attributes in your TLD, like so:
<tag>
...
<dynamic-attributes>true</dynamic-attributes>
</tag>
And then have your tag handler class implement the DynamicAttributes
interface:
public class DynamicAttributesTag extends SimpleTagSupport implements DynamicAttributes {
...
public void setDynamicAttribute(String uri, String localName, Object value) throws JspException {
// This gets called every time a dynamic attribute is set
// You could add the (localName,value) pair to your dynamicAttributes map here
}
...
}
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