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| public static void main(String[] agrs) throws ScriptException {
final ScriptEngine javascriptEngine = new ScriptEngineManager().getEngineByName("javascript");
final Bindings globalBindings = javascriptEngine.getBindings(ScriptContext.GLOBAL_SCOPE);
globalBindings.put("a", 5);
System.out.println("-------Engine bindings scope--------------");
final Bindings javascriptEngineBindings = javascriptEngine.getBindings(ScriptContext.ENGINE_SCOPE);
javascriptEngineBindings.put("x", 20);
javascriptEngineBindings.put("y", 20.4);
javascriptEngineBindings.put("z", 1);
final String[] scriptArray = {"x*y+z", "x*(y+z)", "a+x*(y+z)"};
eval(scriptArray, javascriptEngine);
System.out.println("-------Local bindings scope--------------");
final Bindings localBinding = javascriptEngine.createBindings();
localBinding.put("x", 2);
localBinding.put("y", 3);
localBinding.put("z", 1);
eval(scriptArray, javascriptEngine, localBinding);
}
private static void eval(String[] scriptArray, ScriptEngine javascriptEngine) throws ScriptException {
Bindings aBindings = javascriptEngine.getBindings(ScriptContext.GLOBAL_SCOPE);
for (String key : aBindings.keySet()) {
System.out.println("Args (Global bindings scope) > " + key + "=" + aBindings.get(key));
}
aBindings = javascriptEngine.getBindings(ScriptContext.ENGINE_SCOPE);
for (String key : aBindings.keySet()) {
System.out.println("Args (Engine bindings scope) > " + key + "=" + aBindings.get(key));
}
for (String script : scriptArray) {
System.out.println("script > " + script + " = " + javascriptEngine.eval(script));
}
}
private static void eval(String[] scriptArray, ScriptEngine javascriptEngine, Bindings localBinding) throws ScriptException {
Bindings aBindings = javascriptEngine.getBindings(ScriptContext.GLOBAL_SCOPE);
for (String key : aBindings.keySet()) {
System.out.println("Args (Global bindings scope) > " + key + "=" + aBindings.get(key));
}
aBindings = javascriptEngine.getBindings(ScriptContext.ENGINE_SCOPE);
for (String key : aBindings.keySet()) {
System.out.println("Args (Engine bindings scope) > " + key + "=" + aBindings.get(key));
}
for (String s : localBinding.keySet()) {
System.out.println("Args (Local bindings scope) > " + s + "=" + aBindings.get(s));
}
for (String script : scriptArray) {
System.out.println("script > " + script + " = " + javascriptEngine.eval(script, localBinding));
}
}
|