/**
* Clones this Element, the datasource and the private stylesheet of this Element. The clone does
* no longer have a parent, as the old parent would not recognize that new object anymore.
*
* @return a clone of this Element.
*/
public Element clone() {
try {
final Element e = (Element) super.clone();
e.style = (InternalElementStyleSheet) style.clone();
e.datasource = datasource.clone();
e.parent = null;
e.style.updateElementReference(e);
e.elementContext = null;
if (attributeExpressions != null) {
e.attributes = attributes.clone();
e.attributeExpressions = attributeExpressions.clone();
final String[] namespaces = e.attributeExpressions.getNameSpaces();
for (int i = 0; i < namespaces.length; i++) {
final String namespace = namespaces[i];
final Map<String, Expression> attrsNs = attributeExpressions.getAttributes(namespace);
for (final Map.Entry<String, Expression> entry : attrsNs.entrySet()) {
final Expression exp = entry.getValue();
e.attributeExpressions.setAttribute(
namespace, entry.getKey(), (Expression) exp.clone());
}
}
} else {
if (e.cachedAttributes != null) {
e.attributes = attributes;
e.copyOnWrite = true;
copyOnWrite = true;
} else {
e.copyOnWrite = false;
e.attributes = attributes.clone();
}
}
if (styleExpressions != null) {
e.styleExpressions = (HashMap<StyleKey, Expression>) styleExpressions.clone();
for (final Map.Entry<StyleKey, Expression> entry : e.styleExpressions.entrySet()) {
final Expression exp = entry.getValue();
entry.setValue((Expression) exp.clone());
}
}
return e;
} catch (CloneNotSupportedException cne) {
throw new IllegalStateException(cne);
}
}
/**
* Creates a deep copy of this element and regenerates all instance-ids.
*
* @param preserveElementInstanceIds defines whether this call generates new instance-ids for the
* derived elements. Instance-IDs are used by the report processor to recognize reoccurring
* elements and must not changed within the report run. Outside of the report processors new
* instance ids should be generated at all times to separate instances and to make them
* uniquely identifiable.
* @return the copy of the element.
*/
public Element derive(final boolean preserveElementInstanceIds) {
try {
final Element e = (Element) super.clone();
e.elementContext = null;
if (preserveElementInstanceIds == false) {
e.treeLock = new InstanceID();
}
e.style = (InternalElementStyleSheet) style.derive(preserveElementInstanceIds);
e.datasource = datasource.clone();
e.parent = null;
e.style.updateElementReference(e);
e.attributes = attributes.clone();
e.copyOnWrite = false;
final ElementMetaData metaData = e.getMetaData();
final String[] namespaces = e.attributes.getNameSpaces();
for (int i = 0; i < namespaces.length; i++) {
final String namespace = namespaces[i];
final Map attrsNs = attributes.getAttributes(namespace);
final Iterator it = attrsNs.entrySet().iterator();
while (it.hasNext()) {
final Map.Entry entry = (Map.Entry) it.next();
final Object value = entry.getValue();
final String name = (String) entry.getKey();
final AttributeMetaData data = metaData.getAttributeDescription(namespace, name);
if (data == null) {
if (logger.isDebugEnabled()) {
logger.debug(
getElementTypeName()
+ ": Attribute "
+ namespace
+ "|"
+ name
+ " is not listed in the metadata.");
}
}
if (value instanceof Cloneable) {
e.attributes.setAttribute(namespace, name, ObjectUtilities.clone(value));
} else if (data == null || data.isComputed() == false || data.isDesignTimeValue()) {
e.attributes.setAttribute(namespace, name, value);
} else {
e.attributes.setAttribute(namespace, name, null);
}
}
}
if (e.cachedAttributes != null
&& e.attributes.getChangeTracker() != e.cachedAttributes.getChangeTracker()) {
e.cachedAttributes = null;
}
if (attributeExpressions != null) {
e.attributeExpressions = attributeExpressions.clone();
final String[] attrExprNamespaces = e.attributeExpressions.getNameSpaces();
for (int i = 0; i < attrExprNamespaces.length; i++) {
final String namespace = attrExprNamespaces[i];
final Map attrsNs = attributeExpressions.getAttributes(namespace);
final Iterator it = attrsNs.entrySet().iterator();
while (it.hasNext()) {
final Map.Entry entry = (Map.Entry) it.next();
final Expression exp = (Expression) entry.getValue();
e.attributeExpressions.setAttribute(
namespace, (String) entry.getKey(), exp.getInstance());
}
}
}
if (styleExpressions != null) {
//noinspection unchecked
e.styleExpressions = (HashMap<StyleKey, Expression>) styleExpressions.clone();
final Iterator<Map.Entry<StyleKey, Expression>> styleExpressionsIt =
e.styleExpressions.entrySet().iterator();
while (styleExpressionsIt.hasNext()) {
final Map.Entry<StyleKey, Expression> entry = styleExpressionsIt.next();
final Expression exp = entry.getValue();
entry.setValue(exp.getInstance());
}
}
return e;
} catch (CloneNotSupportedException cne) {
throw new IllegalStateException(cne);
}
}