@Override
protected List<Item> transform(List<Item> items) {
Tag enclosure = null;
List<String> children = null;
List<Tag> enclosureChildTags = null;
for (Item i : items) {
if (i instanceof Tag) {
Tag tag = (Tag) i;
if (isEnclosure(tag)) {
if (tag.getType() == Tag.Type.OPEN) {
// found opening enclosure
enclosure = tag;
children = getChildren(enclosure);
enclosureChildTags = new ArrayList<Tag>();
} else if (tag.getType() == Tag.Type.CLOSE) {
// tidy up on close tag
updateEnclosureChildId(enclosure, children, enclosureChildTags);
enclosure = null;
children = null;
enclosureChildTags = null;
}
} else if (enclosure != null && !children.isEmpty()) {
// if we have open enclosure tag and children to find
int index = checkIfTagIsChild(tag, children, enclosureChildTags);
if (index != -1) {
onChildFound(tag, children, enclosureChildTags, index);
}
}
}
}
return items;
}
/**
* Checks for an id attribute if a brix:tile then a wicket:id
*
* @param tag
* @return
*/
private String getTagId(Tag tag) {
Map<String, String> attributes = tag.getAttributeMap();
String id = null;
if (attributes != null) {
// look for brix:tile first "id" first then "wicket:id"
if (tag instanceof TileTag) {
id = attributes.get(AbstractContainer.MARKUP_TILE_ID);
}
if (id == null) {
id = attributes.get(getWicketIdAttributeName(tag));
}
return id;
}
return null;
}
/**
* Gets the value of the "child" attribute and splits the path into a list
*
* @param enclosure
* @return ids
*/
private List<String> getChildren(Tag enclosure) {
Map<String, String> attributes = enclosure.getAttributeMap();
if (attributes != null) {
if (attributes.containsKey(EnclosureHandler.CHILD_ATTRIBUTE)) {
// split for nested components
String[] children =
attributes.get(EnclosureHandler.CHILD_ATTRIBUTE).split("" + Component.PATH_SEPARATOR);
ArrayList<String> list = new ArrayList<String>();
for (String child : children) {
list.add(child);
}
return list;
}
}
return null;
}
/**
* Replaces the supplied enclosure child tag with the actual resolved comma separated component
* path
*
* @param enclosure
* @param children
* @param enclosureChildTags
*/
private void updateEnclosureChildId(
Tag enclosure, List<String> children, List<Tag> enclosureChildTags) {
Map<String, String> attributes = enclosure.getAttributeMap();
if (attributes != null) {
String child = "";
for (int i = 0; i < children.size(); i++) {
String childid = children.get(i);
if (childid != null) {
child += (child.length() > 0 ? Component.PATH_SEPARATOR : "") + childid;
} else {
Tag tag = enclosureChildTags.get(i);
String id = getGeneratedTagId(tag);
if (id != null) {
// nested children are delimited by commas
child += (child.length() > 0 ? Component.PATH_SEPARATOR : "") + id;
}
}
}
attributes.put(EnclosureHandler.CHILD_ATTRIBUTE, child);
}
}
private boolean isEnclosure(Tag tag) {
return ENCLOSURE.equals(tag.getName());
}