private Object service()

in juneau-core/juneau-marshall/src/main/java/org/apache/juneau/objecttools/ObjectRest.java [760:894]
126 lines of code
39 McCabe index (conditional complexity)

	private Object service(int method, String url, Object val) throws ObjectRestException {

		url = normalizeUrl(url);

		if (method == GET) {
			JsonNode p = getNode(url, root);
			return p == null ? null : p.o;
		}

		// Get the url of the parent and the property name of the addressed object.
		int i = url.lastIndexOf('/');
		String parentUrl = (i == -1 ? null : url.substring(0, i));
		String childKey = (i == -1 ? url : url.substring(i + 1));

		if (method == PUT) {
			if (url.isEmpty()) {
				if (rootLocked)
					throw new ObjectRestException(HTTP_FORBIDDEN, "Cannot overwrite root object");
				Object o = root.o;
				root = new JsonNode(null, null, val, session.object());
				return o;
			}
			JsonNode n = (parentUrl == null ? root : getNode(parentUrl, root));
			if (n == null)
				throw new ObjectRestException(HTTP_NOT_FOUND, "Node at URL ''{0}'' not found.", parentUrl);
			ClassMeta cm = n.cm;
			Object o = n.o;
			if (cm.isMap())
				return ((Map)o).put(childKey, convert(val, cm.getValueType()));
			if (cm.isCollection() && o instanceof List)
				return ((List)o).set(parseInt(childKey), convert(val, cm.getElementType()));
			if (cm.isArray()) {
				o = setArrayEntry(n.o, parseInt(childKey), val, cm.getElementType());
				ClassMeta pct = n.parent.cm;
				Object po = n.parent.o;
				if (pct.isMap()) {
					((Map)po).put(n.keyName, o);
					return url;
				}
				if (pct.isBean()) {
					BeanMap m = session.toBeanMap(po);
					m.put(n.keyName, o);
					return url;
				}
				throw new ObjectRestException(HTTP_BAD_REQUEST, "Cannot perform PUT on ''{0}'' with parent node type ''{1}''", url, pct);
			}
			if (cm.isBean())
				return session.toBeanMap(o).put(childKey, val);
			throw new ObjectRestException(HTTP_BAD_REQUEST, "Cannot perform PUT on ''{0}'' whose parent is of type ''{1}''", url, cm);
		}

		if (method == POST) {
			// Handle POST to root special
			if (url.isEmpty()) {
				ClassMeta cm = root.cm;
				Object o = root.o;
				if (cm.isCollection()) {
					Collection c = (Collection)o;
					c.add(convert(val, cm.getElementType()));
					return (c instanceof List ? url + "/" + (c.size()-1) : null);
				}
				if (cm.isArray()) {
					Object[] o2 = addArrayEntry(o, val, cm.getElementType());
					root = new JsonNode(null, null, o2, null);
					return url + "/" + (o2.length-1);
				}
				throw new ObjectRestException(HTTP_BAD_REQUEST, "Cannot perform POST on ''{0}'' of type ''{1}''", url, cm);
			}
			JsonNode n = getNode(url, root);
			if (n == null)
				throw new ObjectRestException(HTTP_NOT_FOUND, "Node at URL ''{0}'' not found.", url);
			ClassMeta cm = n.cm;
			Object o = n.o;
			if (cm.isArray()) {
				Object[] o2 = addArrayEntry(o, val, cm.getElementType());
				ClassMeta pct = n.parent.cm;
				Object po = n.parent.o;
				if (pct.isMap()) {
					((Map)po).put(childKey, o2);
					return url + "/" + (o2.length-1);
				}
				if (pct.isBean()) {
					BeanMap m = session.toBeanMap(po);
					m.put(childKey, o2);
					return url + "/" + (o2.length-1);
				}
				throw new ObjectRestException(HTTP_BAD_REQUEST, "Cannot perform POST on ''{0}'' with parent node type ''{1}''", url, pct);
			}
			if (cm.isCollection()) {
				Collection c = (Collection)o;
				c.add(convert(val, cm.getElementType()));
				return (c instanceof List ? url + "/" + (c.size()-1) : null);
			}
			throw new ObjectRestException(HTTP_BAD_REQUEST, "Cannot perform POST on ''{0}'' of type ''{1}''", url, cm);
		}

		if (method == DELETE) {
			if (url.isEmpty()) {
				if (rootLocked)
					throw new ObjectRestException(HTTP_FORBIDDEN, "Cannot overwrite root object");
				Object o = root.o;
				root = new JsonNode(null, null, null, session.object());
				return o;
			}
			JsonNode n = (parentUrl == null ? root : getNode(parentUrl, root));
			ClassMeta cm = n.cm;
			Object o = n.o;
			if (cm.isMap())
				return ((Map)o).remove(childKey);
			if (cm.isCollection() && o instanceof List)
				return ((List)o).remove(parseInt(childKey));
			if (cm.isArray()) {
				int index = parseInt(childKey);
				Object old = ((Object[])o)[index];
				Object[] o2 = removeArrayEntry(o, index);
				ClassMeta pct = n.parent.cm;
				Object po = n.parent.o;
				if (pct.isMap()) {
					((Map)po).put(n.keyName, o2);
					return old;
				}
				if (pct.isBean()) {
					BeanMap m = session.toBeanMap(po);
					m.put(n.keyName, o2);
					return old;
				}
				throw new ObjectRestException(HTTP_BAD_REQUEST, "Cannot perform POST on ''{0}'' with parent node type ''{1}''", url, pct);
			}
			if (cm.isBean())
				return session.toBeanMap(o).put(childKey, null);
			throw new ObjectRestException(HTTP_BAD_REQUEST, "Cannot perform PUT on ''{0}'' whose parent is of type ''{1}''", url, cm);
		}

		return null;	// Never gets here.
	}