JSON API draft

In order to provide JSON-nodes within Sirix we need a node-transaction API similar to the XdmNodeReadTrx/XdmNodeWriteTrx-API for XML.

JSONNodeWriteTrx:

• insertObject() creates an empty object node and moves the node cursor to the object node
• insertObjectKey(String) creates an object-key node and moves the node cursor to the object-key node

on the object-key-node the insertObject()-method is valid as well as all of the following methods:

• insertArray() creates an empty array and moves the node cursor to the array node
• insertString(String) creates a String node.
• insertBoolean(boolean) creates a boolean node.
• insertNull() creates a null node and moves the