Configure JMustache to work like GRMustache, to allow the same Mustache templates to be used on iOS and Android

MustacheRenderer.java

package net.kristopherjohnson.mustache;

// from jmustache-1.8.jar
import com.samskivert.mustache.Mustache;

/**
 * Convenience class wrapper around the functionality provided by the JMustache library.
 * 
 * Wherever possible, the template rendering behavior is configured to be compatible with the
 * GRMustache library, so that the same templates can be used on iOS and Android.
 */
public class MustacheRenderer
{
	private final Mustache.Compiler compiler;

	/**
	 * Constructor
	 */
	public MustacheRenderer()
	{
		compiler = createCompiler();
	}

	/**
	 * Render a template taking values from the specified execution context
	 * 
	 * @param template
	 *            Mustache template
	 * @param context
	 *            Execution context
	 * @return String
	 */
	public String renderTemplate(String template, Object context)
	{
		String result = compiler.compile(template).execute(context);
		return result;
	}

	/**
	 * Construct a Mustache.Compiler, configured to maximize compatibility with GRMustache
	 * 
	 * @return Mustache.Compiler
	 */
	private Mustache.Compiler createCompiler()
	{
		Mustache.Compiler compiler = Mustache.compiler();

		// Configure compiler to generate an empty string for any missing value,
		// instead of throwing an exception.
		compiler = compiler.defaultValue("");

		// Configure compiler to treat empty strings as "false" values
		//
		// Note: While JMustache 1.8 does provide option to treat empty strings as false, it
		// does not work properly with inverted sections. See
		// https://github.com/samskivert/jmustache/issues/39.
		//
		// To work around this, you will have to replace empty strings with false or null if you
		// use the values to control inverted sections.
		compiler = compiler.emptyStringIsFalse(true);

		return compiler;
	}
}