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'DatabeneScript' is an open source software library for resolving Java-like script expressions, written by Volker Bergmann.
/*
* (c) Copyright 2009-2011 by Volker Bergmann. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, is permitted under the terms of the
* GNU General Public License.
*
* For redistributing this software or a derivative work under a license other
* than the GPL-compatible Free Software License as defined by the Free
* Software Foundation or approved by OSI, you must first obtain a commercial
* license to this software product from Volker Bergmann.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
* REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
* HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.databene.script.expression;
import org.databene.commons.BeanUtil;
import org.databene.commons.Context;
import org.databene.commons.context.ContextAware;
import org.databene.script.Assignment;
import org.databene.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;
}
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
BeanUtil.setAttributeValue(bean, name, value);
}
if (bean instanceof ContextAware)
((ContextAware) bean).setContext(context);
return bean;
}
}