protected void writeAttributes(DOMOutput out) throws IOException {
Figure prototype = (Figure) out.getPrototype();
boolean isElementOpen = false;
for (Map.Entry<AttributeKey, Object> entry : attributes.entrySet()) {
AttributeKey key = entry.getKey();
if (forbiddenAttributes == null || !forbiddenAttributes.contains(key)) {
Object prototypeValue = key.get(prototype);
Object attributeValue = key.get(this);
if (prototypeValue != attributeValue
|| (prototypeValue != null
&& attributeValue != null
&& !prototypeValue.equals(attributeValue))) {
if (!isElementOpen) {
out.openElement("a");
isElementOpen = true;
}
out.openElement(key.getKey());
out.writeObject(entry.getValue());
out.closeElement();
}
}
}
if (isElementOpen) {
out.closeElement();
}
}
@SuppressWarnings("unchecked")
protected void readAttributes(DOMInput in) throws IOException {
if (in.getElementCount("a") > 0) {
in.openElement("a");
for (int i = in.getElementCount() - 1; i >= 0; i--) {
in.openElement(i);
String name = in.getTagName();
Object value = in.readObject();
AttributeKey key = getAttributeKey(name);
if (key != null && key.isAssignable(value)) {
if (forbiddenAttributes == null || !forbiddenAttributes.contains(key)) {
setAttribute(key, value);
}
}
in.closeElement();
}
in.closeElement();
}
}
public boolean isAttributeEnabled(AttributeKey key) {
return forbiddenAttributes == null || !forbiddenAttributes.contains(key);
}
/**
* Sets an attribute of the figure. AttributeKey name and semantics are defined by the class
* implementing the figure interface.
*/
public <T> void setAttribute(AttributeKey<T> key, T newValue) {
if (forbiddenAttributes == null || !forbiddenAttributes.contains(key)) {
T oldValue = (T) key.put(attributes, newValue);
fireAttributeChanged(key, oldValue, newValue);
}
}