Notice: This Wiki is now read only and edits are no longer possible. Please see: https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/wikis/Wiki-shutdown-plan for the plan.
XDI4j Tutorial 2
Revision as of 08:12, 29 January 2010 by Unnamed Poltroon (Talk)
{{#eclipseproject:technology.higgins|eclipse_custom_style.css}}
This tutorial explains how to serialize and deserialize an XDI graph in any of the XDI serialization formats.
A typical application is to read an XDI graph from a file into memory, perform a few operations on it, and then store it again to file.
Serialization
Example Code:
package org.eclipse.higgins.xdi4j.tutorial; import java.io.File; import java.io.FileInputStream; import org.eclipse.higgins.xdi4j.Graph; import org.eclipse.higgins.xdi4j.GraphFactory; import org.eclipse.higgins.xdi4j.impl.memory.MemoryGraphFactory; import org.eclipse.higgins.xdi4j.io.XDIReader; import org.eclipse.higgins.xdi4j.io.XDIReaderRegistry; import org.eclipse.higgins.xdi4j.io.XDIWriter; import org.eclipse.higgins.xdi4j.io.XDIWriterRegistry; /** * This example app shows how to read a graph in one format * and store it in another. */ public class Tutorial2A { public static void main(String[] args) throws Exception { GraphFactory factory = MemoryGraphFactory.getInstance(); Graph graph = factory.openGraph(); // read a graph from file File file = new File("test.graph"); XDIReader reader = XDIReaderRegistry.getAuto(); reader.read(graph, new FileInputStream(file), null); // output the graph in X3 Simple XDIWriter writer; writer = XDIWriterRegistry.forFormat("X3 Simple"); writer.write(graph, System.out, null); graph.close(); } }