Builder for Android/Eclipse that generates references to Views

CreateRMapping.xml

<?xml version="1.0"?>
<project name="createRMapping" default="main">

	<property name="package" value="org.somecompany.somepackage" />

	<target name="main">
		<script language="javascript">
			<classpath>
   				 <fileset dir="libs" includes="guava*.jar" />
  			</classpath>
		<![CDATA[
		
			importClass(java.io.File);
			importClass(com.google.common.io.Files);
			importClass(com.google.common.base.Charsets);

			// FUNCTIONS //
			function echo(msg) {
				e = project.createTask("echo");
				e.setMessage(msg);
				e.perform();
			}

			function xmlChildWalker(xml) {
				var i = 0;
				var child = xml.*[0];
				while (child != undefined) {
					yield child;
					child = xml.*[++i];
				}
				yield false;
			}

			// VARIABLES //
			var projectDir = project.getBaseDir().getPath();
			var javaPackage = project.getProperty("package");
			
			// Get xml files 
			var fs = project.createDataType("fileset");
			fs.setDir(new File(projectDir + "/res/layout/"));
			fs.setIncludes("**/*.xml");
			var srcFiles = fs.getDirectoryScanner(project).getIncludedFiles();
			
			// iterate over that array
			for (i = 0; i < srcFiles.length; i++) {
			
				var mapping = {};

				// get the values via Java API
				var filename = srcFiles[i];
				var file = new File(fs.getDir(project), filename);

				echo("processing: " + file);
			
				// read into string and remove <xml> line
				var xmlString = Files.toString(file, Charsets.UTF_8);
				xmlString = xmlString.split("\n").splice(1).join("\n");
			
				// walk xml	        
				var xcw = xmlChildWalker(new XML(xmlString));
				var child;
				while ((child = xcw.next()) !== false) {
					for (var j = 0; j < child.attributes().length(); j++) {
						var attr = child.attributes()[j];
						var attrName = attr.localName();
						if (attrName == "id") {
							var id = attr.toString();
							id = id.substring(5);
							var clazz = child.name();
							mapping[id] = clazz;
						}
					}
				}
			
				var layoutBaseName = filename.substring(0, filename.length() - 4);
				var javaClassName = "ViewRef_" + layoutBaseName;
			
				/* OUTPUT */
				var str = "";	
			
				/* package + imports */
				str += "package " + javaPackage + ";\n \n";
				str += "import android.view.*;\n";
				str += "import android.widget.*;\n";
				str += "import java.lang.String;\n";
					
				/* class start */
				str += "\n \n";
				str += "@SuppressWarnings(\"unused\")\n";
				str += "public final class " + javaClassName + " {\n \n";
			
				/* members */
				for (var id in mapping) {
					var type = mapping[id];
			
					/* strip layout_ if specified */
					var memberName = id;
					if (id.indexOf(layoutBaseName + "_") == 0) {
						memberName = id.substring(layoutBaseName.length() + 1);
					}
				
					str += "\tpublic final " + type + " " + memberName + ";\n";
				}
			
				/* constructor */
				str += "\n \n";
				str += "\tprivate " + javaClassName + "(View root) {\n";
			
				for (var id in mapping) {
					var type = mapping[id];
			
					/* strip layout_ if specified */
					var memberName = id;
					if (id.indexOf(layoutBaseName + "_") == 0) {
						memberName = id.substring(layoutBaseName.length() + 1);
					}
				
					str += "\t\tthis." + memberName + " = (" + type + ") root.findViewById(R.id." + id + ");\n";  
				}
			
				str += "\t}\n \n";
			
				/* static creator */
				str += "\tpublic static " + javaClassName + " create(View root) {\n";
				str += "\t\treturn new " + javaClassName + "(root);\n";
				str += "\t}\n \n";
			
				
				
				str += "\n}";
				
				out = project.createTask("echo");
				out.setMessage(str);
				var packageDir = projectDir + "/gen/" + javaPackage.replace('.', "/");
				out.setFile(new File(packageDir + "/" + javaClassName + ".java"));
				out.perform();
			
			}
			
			
	      
	    ]]></script>
	</target>
</project>
	

test.xml

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android" >

    <TextView
        android:id="@+id/text1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <TextView
        android:id="@+id/text2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/text1" />

    <ScrollView
        android:id="@+id/scroll"
        android:layout_width="match_parent"
        android:layout_height="350px"
        android:layout_below="@id/text2"
        android:layout_marginTop="50px" />

</merge>

TestView.java

public final class TestView extends RelativeLayout {

	//~ Constructors ---------------------------------------------------------------------------------------------------
	private final ViewRef_test;
	
	public TestView(final Context context) {
		super(context);
		
		LayoutInflater.from(context).inflate(R.layout.test, this, true);
		this.v								    = ViewRef_test.create(this);


		this.v.text1.setText();
		this.v.scroll.doSomething();
	}
}

ViewRef_test.java

/* generated file */

package org.somecompany.somepackage;
 
import android.view.*;
import android.widget.*;
import java.lang.String;

 
@SuppressWarnings("unused")
public final class ViewRef_test {
 
	public final TextView text1;
	public final TextView text2;
	public final ScrollView scroll;

 
	private ViewRef_test(View root) {
		this.text1 = (TextView) root.findViewById(R.id.text1);
		this.text2 = (TextView) root.findViewById(R.id.text2);
		this.scroll = (ScrollView) root.findViewById(R.id.scroll);
	}
 
	public static ViewRef_test create(View root) {
		return new ViewRef_test(root);
	}
 

}