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'rapiddweller Script' is an open source software library for resolving Java-like script expressions, forked from Databene Scripts written by Volker Bergmann.

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/*
 * Copyright (C) 2011-2014 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.rapiddweller.script;

import com.rapiddweller.commons.ArrayFormat;
import com.rapiddweller.commons.BeanUtil;
import com.rapiddweller.commons.ConfigurationError;
import com.rapiddweller.commons.Context;
import com.rapiddweller.commons.ExceptionUtil;
import com.rapiddweller.commons.bean.DefaultClassProvider;
import com.rapiddweller.script.expression.DynamicExpression;

/**
 * {@link Expression} instance that evaluates the Benerator script notation for Java object specification
 * as one of the following: 
 * 
    
 *   
  • reference: myInstance
    • 
 *   
  • class name: com.my.SpecialClass
    • 
 *   
  • constructor invocation: new com.my.SpecialClass(3, 'test')
    • 
 *   
  • JavaBean property syntax: new com.my.SpecialClass[id=3, name='test']
    • 
 * 

 * 

 * Created at 08.10.2009 18:15:15
 * @since 0.6.0
 * @author Volker Bergmann
 */

public class QNBeanSpecExpression extends DynamicExpression {
	
	String[] qn;

    public QNBeanSpecExpression(String[] qn) {
    	this.qn = qn;
    }

    @Override
	public Object evaluate(Context context) {
    	return resolve(context).getBean();
    }

    public BeanSpec resolve(Context context) {
    	String objectOrClassName = ArrayFormat.format(".", qn);
    	try {
    		if (context.contains(objectOrClassName))
    			return BeanSpec.createReference(context.get(objectOrClassName));
    		String className = objectOrClassName;
    		Class type = DefaultClassProvider.resolveByObjectOrDefaultInstance(className, context);
    		return BeanSpec.createConstruction(BeanUtil.newInstance(type));
    	} catch (ConfigurationError e) {
    		if (ExceptionUtil.getRootCause(e) instanceof ClassNotFoundException)
    			return new QNExpression(qn).resolve(context);
    		else
    			throw new ConfigurationError("Cannot resolve " + objectOrClassName, e);
    	}
    }

}
    

    

    

            

    

            



    
    






    
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