Groovy example source code file (AggregateBinding.java)

This example Groovy source code file (AggregateBinding.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

aggregatebinding, aggregatebinding, bindingupdatable, bindingupdatable, linkedhashset, linkedhashset, set, set, util

The Groovy AggregateBinding.java source code

/*
 * Copyright 2003-2010 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 java.util.LinkedHashSet;
import java.util.Set;

/**
 * An aggregation of multiple bindings
 * @author Danno Ferrin
 * @since Groovy 1.6
 */
public class AggregateBinding implements BindingUpdatable {

    protected  boolean bound;

    // use linked hash set so order is preserved
    protected Set<BindingUpdatable> bindings = new LinkedHashSet();

    public void addBinding(BindingUpdatable binding) {
        if (bound) binding.bind(); // bind is idempotent, so no state checking
        bindings.add(binding);
    }

    public void removeBinding(BindingUpdatable binding) {
        bindings.remove(binding);
    }

    public void bind() {
        if (!bound) {
            bound = true;
            for (BindingUpdatable binding : bindings) {
                binding.bind();
            }
        }
    }

    public void unbind() {
        if (bound) {
            for (BindingUpdatable binding : bindings) {
                binding.unbind();
            }
            bound = false;
        }
    }

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

    public void update() {
        for (BindingUpdatable binding : bindings) {
            binding.update();
        }
    }

    public void reverseUpdate() {
        for (BindingUpdatable binding : bindings) {
            binding.reverseUpdate();
        }
    }
}