/*
* Copyright WizTools.org
* Licensed under the Apache License, Version 2.0:
* http://www.apache.org/licenses/LICENSE-2.0
*/
//package org.wiztools.commons;
import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
/**
* JavaScript functions in Java. Internally calls Rhino's implementation of the
* function calls.
* @author subhash
*/
public class JavaScript {
private JavaScript() {}
private static final ScriptEngine jsEngine;
static {
jsEngine = new ScriptEngineManager().getEngineByName("JavaScript");
}
private static String toUpperCaseEncodedChars(final String inStr) {
int lastPercentPosition = -3; // 0- (-3 ) > 2: ensures the first character is not uppercased accidently
final char[] c = inStr.toCharArray();
char[] cOut = new char[c.length];
for(int i=0; i< c.length; i++) {
if(c[i] == '%') {
lastPercentPosition = i;
}
final int diff = i - lastPercentPosition;
if(diff == 1 || diff == 2) {
cOut[i] = Character.toUpperCase(c[i]);
}
else {
cOut[i] = c[i];
}
}
return new String(cOut);
}
public static String escape(final String str) {
try{
return (String) ((Invocable) jsEngine).invokeFunction("escape", str);
}
catch(ScriptException ex) {
throw new RuntimeException(ex);
}
catch(NoSuchMethodException ex) {
throw new RuntimeException(ex);
}
}
public static String unescape(final String str) {
try{
return (String) ((Invocable) jsEngine).invokeFunction("unescape", str);
}
catch(ScriptException ex) {
throw new RuntimeException(ex);
}
catch(NoSuchMethodException ex) {
throw new RuntimeException(ex);
}
}
public static String encodeURI(final String str) {
try{
final String out = (String) ((Invocable) jsEngine).invokeFunction("encodeURI", str);
return toUpperCaseEncodedChars(out);
}
catch(ScriptException ex) {
throw new RuntimeException(ex);
}
catch(NoSuchMethodException ex) {
throw new RuntimeException(ex);
}
}
public static String decodeURI(final String str) {
try{
return (String) ((Invocable) jsEngine).invokeFunction("decodeURI", str);
}
catch(ScriptException ex) {
throw new RuntimeException(ex);
}
catch(NoSuchMethodException ex) {
throw new RuntimeException(ex);
}
}
public static String encodeURIComponent(final String str) {
try{
final String out = (String) ((Invocable) jsEngine).invokeFunction("encodeURIComponent", str);
return toUpperCaseEncodedChars(out);
}
catch(ScriptException ex) {
throw new RuntimeException(ex);
}
catch(NoSuchMethodException ex) {
throw new RuntimeException(ex);
}
}
/**
*
* @param str
* @return
*/
public static String decodeURIComponent(final String str) {
try{
return (String) ((Invocable) jsEngine).invokeFunction("decodeURIComponent", str);
}
catch(ScriptException ex) {
throw new RuntimeException(ex);
}
catch(NoSuchMethodException ex) {
throw new RuntimeException(ex);
}
}
}
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