Activator.java 文件源码

public static Boolean evaluateActivationExpression(Bindings bindings, Expression activationExpression) {
    Boolean expressionResult; 
    if(activationExpression!=null) {
        CompiledScript script = activationExpression.compiledScript;
        if(script!=null) {
            try {
                Object evaluationResult = script.eval(bindings);
                if(evaluationResult instanceof Boolean) {
                    expressionResult = (Boolean) evaluationResult;
                } else {
                    expressionResult = false;
                }
            } catch (ScriptException e) {
                expressionResult = false;
            }
        } else {
            expressionResult = true;
        }
    } else {
        expressionResult = true;
    }
    return expressionResult;
}