com.sun.faces.scripting.groovy.GroovyHelper Maven / Gradle / Ivy
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package com.sun.faces.scripting.groovy;
import com.sun.faces.util.Util;
import javax.faces.FacesException;
import javax.faces.context.FacesContext;
import javax.servlet.ServletContext;
import java.lang.reflect.Constructor;
import java.net.URL;
import java.util.Set;
/**
* Base class for interfacing with Groovy.
*/
public abstract class GroovyHelper {
public static boolean isGroovyAvailable(FacesContext ctx) {
return (ctx.getExternalContext().getApplicationMap().get("com.sun.faces.groovyhelper") != null);
}
public static GroovyHelper getCurrentInstance(FacesContext ctx) {
return (GroovyHelper) ctx.getExternalContext().getApplicationMap().get("com.sun.faces.groovyhelper");
}
public static GroovyHelper getCurrentInstance(ServletContext sc) {
return (GroovyHelper) sc.getAttribute("com.sun.faces.groovyhelper");
}
public static GroovyHelper getCurrentInstance() {
FacesContext ctx = FacesContext.getCurrentInstance();
if (ctx != null) {
return getCurrentInstance(ctx);
}
return null;
}
public abstract Class loadScript(String name);
public static Object newInstance(String name, Class type, Object root)
throws Exception {
Class delegate = Util.loadClass(name, GroovyHelper.class);
try {
Constructor decorationCtor = requiresDecoration(delegate, type, root);
if (decorationCtor != null) {
return decorationCtor.newInstance(root);
} else {
return delegate.newInstance();
}
} catch (Exception e) {
throw new FacesException(e);
}
}
public static Object newInstance(String name) throws Exception {
return newInstance(name, null, null);
}
public abstract void setClassLoader();
public abstract void addURL(URL toAdd);
// --------------------------------------------------------- Private Methods
private static Constructor requiresDecoration(Class groovyClass, Class ctorArgument, Object root) {
if (root != null) {
try {
return groovyClass.getConstructor(ctorArgument);
} catch (Exception ignored) {
}
}
return null;
}
}