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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.expression;

import com.rapiddweller.commons.BeanUtil;
import com.rapiddweller.commons.Context;
import com.rapiddweller.commons.context.ContextAware;
import com.rapiddweller.commons.mutator.AnyMutator;
import com.rapiddweller.script.Assignment;
import com.rapiddweller.script.Expression;

/**
 * {@link Expression} implementation that instantiates a JavaBean by default constructor and 
 * calls its property setters for initializing state.

 * 

 * Created at 06.10.2009 11:48:59
 * @since 0.6.0
 * @author Volker Bergmann
 */

public class BeanConstruction extends DynamicExpression {
	
	private Expression instantiation;
	private Assignment[] assignments;

    public BeanConstruction(String beanClassName, Assignment[] assignments) {
	    this(new DefaultConstruction(beanClassName), assignments);
    }

    public BeanConstruction(Expression instantiation, Assignment[] assignments) {
	    this.instantiation = instantiation;
	    this.assignments = assignments;
    }

	@Override
	public E evaluate(Context context) {
	    E bean = instantiation.evaluate(context);
	    for (Assignment assignment : assignments) {
	    	String name = assignment.getName();
	    	Object value = assignment.getExpression().evaluate(context);
	    	if (BeanUtil.hasProperty(bean.getClass(), name))
	    		BeanUtil.setPropertyValue(bean, name, value, false);
	    	else
	    		AnyMutator.setValue(bean, name, value, true, true);
	    }
	    if (bean instanceof ContextAware)
	    	((ContextAware) bean).setContext(context);
		return bean;
    }

}