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Groovy: A powerful, dynamic language for the JVM
/*
* Copyright 2007 the original author or authors.
*
* 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 org.codehaus.groovy.binding;
import groovy.lang.Closure;
/**
* @author Danno Ferrin
* @version $Revision: 16007 $
* @since Groovy 1.1
*/
public abstract class AbstractFullBinding implements FullBinding {
protected SourceBinding sourceBinding;
protected TargetBinding targetBinding;
protected Closure validator;
protected Closure converter;
protected Closure reverseConverter;
private void fireBinding() {
if ((sourceBinding == null) || (targetBinding == null)) {
// should we throw invalid binding exception? or fail quietly?
return;
}
Object result = sourceBinding.getSourceValue();
if (getValidator() != null) {
Object validation = getValidator().call(result);
if ((validation == null)
|| ((validation instanceof Boolean) && !((Boolean)validation).booleanValue()))
{
// should we throw a validation failed exception? or fail quietly?
return;
}
}
if (getConverter() != null) {
result = getConverter().call(result);
}
targetBinding.updateTargetValue(result);
}
public void update() {
fireBinding();
}
private void fireReverseBinding() {
if (!(sourceBinding instanceof TargetBinding) || !(targetBinding instanceof SourceBinding)) {
throw new RuntimeException("Binding Instance is not reversable");
}
Object result = ((SourceBinding)targetBinding).getSourceValue();
if (getReverseConverter() != null) {
result = getReverseConverter().call(result);
}
((TargetBinding)sourceBinding).updateTargetValue(result);
}
public void reverseUpdate() {
fireReverseBinding();
}
public SourceBinding getSourceBinding() {
return sourceBinding;
}
public void setSourceBinding(SourceBinding sourceBinding) {
this.sourceBinding = sourceBinding;
}
public TargetBinding getTargetBinding() {
return targetBinding;
}
public void setTargetBinding(TargetBinding targetBinding) {
this.targetBinding = targetBinding;
}
public Closure getValidator() {
return validator;
}
public void setValidator(Closure validator) {
this.validator = validator;
}
public Closure getConverter() {
return converter;
}
public void setConverter(Closure converter) {
this.converter = converter;
}
public Closure getReverseConverter() {
return reverseConverter;
}
public void setReverseConverter(Closure reverseConverter) {
this.reverseConverter = reverseConverter;
}
}