@Override
public <T> T transform(GraphContext ctx, final Object source, final T target) {
// a source graph must be specified
if (source == null) {
throw new GraphException("No source graph to transform [null]", new NullPointerException());
}
// if no context is passed, a default one gets created
if (ctx == null) {
final NodeMapping mapping = getNodeMapping(source.getClass());
final Class nodeType = mapping.getSourceConfig().getType();
if (getSourceConfig().getNodes().containsKey(nodeType)) {
ctx = this.createGraphContext();
} else {
if (getTargetConfig().getNodes().containsKey(nodeType)) {
ctx = this.createSecondGraphContext();
} else {
throw new GraphException("Can't create a GraphContext");
}
}
}
final T result = graphProcessor.process(ctx, source, target);
return result;
}
@Override
public void addNodeMapping(final NodeMapping cfg) {
super.addNodeMapping(cfg);
// add bi-directional mapping
final Class<?> src = cfg.getTargetConfig().getType();
final Class<?> dest = cfg.getSourceConfig().getType();
final NodeMapping targetNode = new DefaultNodeMapping(this, src, dest);
this.nodeMappings.put(targetNode.getSourceConfig().getType(), targetNode);
}