The java.swing.tree option

The java.swing.tree option enables an interpreter facility for Relaxer objects.

Parameters

The java.swing.tree option takes one of the following values as a parameter:

true

Enables an interpreter facility.

false

Disables an interpreter facility.

The default configuration is false. No parameter implies that the parameter is 'true'.

Artifacts

The java.swing.tree option generates no additional classes, but RelaxerOrg.jar is needed for the class library.

The java.swing.tree option adds the following methods to Relaxer objects.

• rGetParentRNode()
• rSetParentRNode(IRNode)
• rGetRNodes()
• Object eval()
• Object eval(IREvaluationContext)
• Object eval(Object[], IREvaluationContext)

The rGetParentRNode mehtod, the rSetParentRNode method, and the rGetRNodes methods are derived from the java.pattern.composite option.

Three eval methods are methods for interpreter.(?)

Example

List 4.19.3.1[javaSwingTree.rng] is a sample schema for the java.swing.tree option.

<grammar xmlns="http://relaxng.org/ns/structure/1.0"
         xmlns:java="http://www.relaxer.org/xmlns/relaxer/java"
         datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
  <start>
    <ref name="account"/>
  </start>
  <define name="account">
    <element name="account">
      <attribute name="accountNo">
        <data type="token"/>
      </attribute>
      <element name="balance">
        <data type="int"/>
      </element>
      <element name="owner">
        <data type="token"/>
      </element>
      <optional>
        <ref name="address"/>
      </optional>
      <zeroOrMore>
        <ref name="phone"/>
      </zeroOrMore>
    </element>
  </define>
  <define name="address">
    <element name="address">
      <attribute name="zip">
        <data type="token"/>
      </attribute>
      <text/>
    </element>
  </define>
  <define name="phone">
    <element name="phone">
      <attribute name="area">
        <data type="token"/>
      </attribute>
      <data type="token"/>
    </element>
  </define>
</grammar>

Build

Execution of Relaxer with the java.swing.tree option is as follows:

$ relaxer -java -java.swing.tree javaSwingTree.rng

Because the Java generator is a default generator, execution of Relaxer as shown below has the same effect:

$ relaxer -java.swing.tree javaSwingTree.rng

As a result, Relaxer generates six files:

• Account.java
• Address.java
• Phone.java
• URelaxer.java
• RStack.java
• UJAXP.java

List 4.19.3.1.1[JavaSwingTree.java] is a sample program for the java.swing.tree option.

import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.*;
import javax.swing.tree.*;

public class JavaSwingTree {
    public static void main(String[] args) throws Exception {
	String fileName = args[0];
	Account account = new Account(fileName);
	JTree jtree = new JTree(account);
	JFrame jframe = new JFrame("java.swing.tree");
	jframe.addWindowListener(
	    new WindowAdapter() {
		public void windowClosing(WindowEvent evt) {
		    System.exit(0);
	        }
	    }
	);
	jframe.getContentPane().add(new JScrollPane(jtree));
	jframe.pack();
	jframe.setVisible(true);
    }
}

Compilation of JavaSwingTree class is shown here:

$ javac JavaSwingTree.java

Execution

List 4.19.3.2.1[javaSwingTree.xml] is an XML document for testing.

<account accountNo="12345">
  <balance>102030</balance>
  <owner>XML Taro</owner>
  <address zip="213">Yokohama</address>
  <phone area="123">456-7890</phone>
  <phone area="090">123-4567</phone>
</account>

Execution of the JavaSwingTree class is shown here:

$ java JavaSwingTree javaSwingTree.xml

(??)

Example 2

Example 3