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Groovy example source code file (AbstractSyntheticBinding.java)

This example Groovy source code file (AbstractSyntheticBinding.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

abstractfullbinding, abstractsyntheticbinding, abstractsyntheticbinding, class, illegalargumentexception, illegalargumentexception, propertybinding, propertybinding, propertyname, propertysourcebindings, sourcebean, string, string, targetbinding

The Groovy AbstractSyntheticBinding.java source code

/*
 * Copyright 2007-2008 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 groovy.swing.binding;

import org.codehaus.groovy.binding.AbstractFullBinding;
import org.codehaus.groovy.binding.PropertyBinding;
import org.codehaus.groovy.binding.SourceBinding;
import org.codehaus.groovy.binding.TargetBinding;

/**
 * Created by IntelliJ IDEA.
 * User: Danno.Ferrin
 * Date: Jun 18, 2008
 * Time: 1:41:14 PM
 */
public abstract class AbstractSyntheticBinding extends AbstractFullBinding {
    boolean bound;
    String propertyName;
    Class klass;

    public AbstractSyntheticBinding(PropertyBinding source, TargetBinding target, Class klass, String propertyName) {
        this.propertyName = propertyName;
        this.klass = klass;
        bound = false;
        setSourceBinding(source);
        setTargetBinding(target);
    }

    public void bind() {
        if (!bound) {
            try {
                syntheticBind();
                bound = true;
            } catch (RuntimeException re) {
                try {
                    syntheticUnbind();
                } catch (Exception e) {
                    // ignore as we are re-throwing the original cause
                }
                throw re;
            }
        }
    }

    public void unbind() {
        if (bound) {
            // fail dirty, no checks
            bound = false;
            syntheticUnbind();
        }
    }

    protected abstract void syntheticBind();
    protected abstract void syntheticUnbind();

    public void rebind() {
        if (bound) {
            unbind();
            bind();
        }
    }

    public void setSourceBinding(SourceBinding source) {
        if (!(source instanceof PropertyBinding)) {
            throw new IllegalArgumentException("Only PropertySourceBindings are accepted");
        }

        if (!propertyName.equals(((PropertyBinding) source).getPropertyName())) {
            throw new IllegalArgumentException("PropertyName must be '" + propertyName + "'");
        }
        Object bean = ((PropertyBinding) source).getBean();
        if ((bean == null) || !klass.isAssignableFrom(bean.getClass())) {
            throw new IllegalArgumentException("SourceBean must be a " + klass.getName());
        }
        super.setSourceBinding(source);
    }

    public void setTargetBinding(TargetBinding target) {
        super.setTargetBinding(target);
    }
}

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