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Difference between revisions of "XDI4j Tutorial 2"
(→Serialization) |
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| Line 7: | Line 7: | ||
== Serialization == | == Serialization == | ||
| − | + | '''Example Code:''' | |
<pre> | <pre> | ||
| Line 51: | Line 51: | ||
== Deserialization == | == Deserialization == | ||
| + | |||
| + | '''Example Code:''' | ||
<pre> | <pre> | ||
package org.eclipse.higgins.xdi4j.tutorial; | package org.eclipse.higgins.xdi4j.tutorial; | ||
| − | |||
| − | |||
| − | |||
import org.eclipse.higgins.xdi4j.Graph; | import org.eclipse.higgins.xdi4j.Graph; | ||
import org.eclipse.higgins.xdi4j.GraphFactory; | import org.eclipse.higgins.xdi4j.GraphFactory; | ||
import org.eclipse.higgins.xdi4j.impl.memory.MemoryGraphFactory; | import org.eclipse.higgins.xdi4j.impl.memory.MemoryGraphFactory; | ||
| − | |||
| − | |||
import org.eclipse.higgins.xdi4j.io.XDIWriter; | import org.eclipse.higgins.xdi4j.io.XDIWriter; | ||
import org.eclipse.higgins.xdi4j.io.XDIWriterRegistry; | import org.eclipse.higgins.xdi4j.io.XDIWriterRegistry; | ||
| + | import org.eclipse.higgins.xdi4j.xri3.impl.XRI3Segment; | ||
/** | /** | ||
| − | * This example app shows how to | + | * This example app shows how to output |
| − | * | + | * a graph in different serialization formats. |
*/ | */ | ||
| − | public class | + | public class Tutorial2 { |
public static void main(String[] args) throws Exception { | public static void main(String[] args) throws Exception { | ||
| Line 77: | Line 75: | ||
Graph graph = factory.openGraph(); | Graph graph = factory.openGraph(); | ||
| − | // | + | // let's create a simple graph |
| − | + | graph.createStatement(new XRI3Segment("=alice"), new XRI3Segment("+name"), "Alice X."); | |
| − | + | graph.createStatement(new XRI3Segment("=alice"), new XRI3Segment("+friend"), new XRI3Segment("=bob")); | |
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | // output the graph in X3 Simple and XDI/XML | |
| − | + | ||
| − | // output the graph in X3 Simple | + | |
XDIWriter writer; | XDIWriter writer; | ||
writer = XDIWriterRegistry.forFormat("X3 Simple"); | writer = XDIWriterRegistry.forFormat("X3 Simple"); | ||
| + | writer.write(graph, System.out, null); | ||
| + | |||
| + | writer = XDIWriterRegistry.forFormat("XDI/XML"); | ||
writer.write(graph, System.out, null); | writer.write(graph, System.out, null); | ||
Revision as of 08:06, 29 January 2010
{{#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 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.XDIWriter;
import org.eclipse.higgins.xdi4j.io.XDIWriterRegistry;
import org.eclipse.higgins.xdi4j.xri3.impl.XRI3Segment;
/**
* This example app shows how to output
* a graph in different serialization formats.
*/
public class Tutorial2 {
public static void main(String[] args) throws Exception {
GraphFactory factory = MemoryGraphFactory.getInstance();
Graph graph = factory.openGraph();
// let's create a simple graph
graph.createStatement(new XRI3Segment("=markus"), new XRI3Segment("+name"), "Markus");
graph.createStatement(new XRI3Segment("=markus"), new XRI3Segment("+friend"), new XRI3Segment("=giovanni"));
// output the graph in X3 Simple and XDI/XML
XDIWriter writer;
writer = XDIWriterRegistry.forFormat("X3 Simple");
writer.write(graph, System.out, null);
writer = XDIWriterRegistry.forFormat("XDI/XML");
writer.write(graph, System.out, null);
graph.close();
}
}
Deserialization
Example Code:
package org.eclipse.higgins.xdi4j.tutorial;
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.XDIWriter;
import org.eclipse.higgins.xdi4j.io.XDIWriterRegistry;
import org.eclipse.higgins.xdi4j.xri3.impl.XRI3Segment;
/**
* This example app shows how to output
* a graph in different serialization formats.
*/
public class Tutorial2 {
public static void main(String[] args) throws Exception {
GraphFactory factory = MemoryGraphFactory.getInstance();
Graph graph = factory.openGraph();
// let's create a simple graph
graph.createStatement(new XRI3Segment("=alice"), new XRI3Segment("+name"), "Alice X.");
graph.createStatement(new XRI3Segment("=alice"), new XRI3Segment("+friend"), new XRI3Segment("=bob"));
// output the graph in X3 Simple and XDI/XML
XDIWriter writer;
writer = XDIWriterRegistry.forFormat("X3 Simple");
writer.write(graph, System.out, null);
writer = XDIWriterRegistry.forFormat("XDI/XML");
writer.write(graph, System.out, null);
graph.close();
}
}