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Groovy example source code file (AbstractFullBinding.java)

This example Groovy source code file (AbstractFullBinding.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, binding, boolean, closure, closure, fullbinding, instance, object, object, runtimeexception, sourcebinding, sourcebinding, targetbinding, targetbinding

The Groovy AbstractFullBinding.java source code

/*
 * 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 <a href="mailto:shemnon@yahoo.com">Danno Ferrin
 * @version $Revision: 16006 $
 * @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))
            {
                // 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;
    }
}

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