dk.teachus.frontend.components.form.ElementModifier.java Source code

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Here is the source code for dk.teachus.frontend.components.form.ElementModifier.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 dk.teachus.frontend.components.form;

import java.io.Serializable;

import org.apache.wicket.Component;
import org.apache.wicket.WicketRuntimeException;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.form.AjaxFormComponentUpdatingBehavior;
import org.apache.wicket.behavior.Behavior;

public class ElementModifier extends Behavior {
    private static final long serialVersionUID = 1L;

    public static interface BehaviorAdder extends Serializable {
        Behavior createNewBehavior();
    }

    private String event;
    private ValidationProducer validationProducer;

    public ElementModifier(String event) {
        this(event, null);
    }

    public ElementModifier(String event, ValidationProducer validationProducer) {
        this.event = event;
        this.validationProducer = validationProducer;
    }

    @Override
    public void bind(Component component) {
        final ValidationProducer validationProducer = getValidationProducer(component);

        validationProducer.add(new BehaviorAdder() {
            private static final long serialVersionUID = 1L;

            public Behavior createNewBehavior() {
                return new AjaxFormComponentUpdatingBehavior(event) {
                    private static final long serialVersionUID = 1L;

                    @Override
                    protected void onUpdate(AjaxRequestTarget target) {
                        Component[] components = validationProducer.inputValid();

                        for (Component component2 : components) {
                            target.add(component2);
                        }
                    }

                    @Override
                    protected void onError(AjaxRequestTarget target, RuntimeException e) {
                        Component[] components = validationProducer.inputInvalid();

                        for (Component component2 : components) {
                            target.add(component2);
                        }
                    }
                };
            }

        });

        if (validationProducer.hasError()) {
            validationProducer.inputInvalid();
        } else {
            validationProducer.inputValid();
        }
    }

    private ValidationProducer getValidationProducer(Component component) {
        if (validationProducer != null) {
            return validationProducer;
        } else {
            if (component instanceof ValidationProducer == false) {
                throw new WicketRuntimeException();
            }

            return (ValidationProducer) component;
        }
    }

}