dk.netdesign.common.osgi.config.wicket.RequiredConfigBehavior.java Source code

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Here is the source code for dk.netdesign.common.osgi.config.wicket.RequiredConfigBehavior.java

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/*
 * Copyright 2017 mnn.
 *
 * 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 dk.netdesign.common.osgi.config.wicket;

import dk.netdesign.common.osgi.config.Attribute;
import dk.netdesign.common.osgi.config.ManagedPropertiesController;
import dk.netdesign.common.osgi.config.annotation.Property;
import dk.netdesign.common.osgi.config.exception.UnknownValueException;
import java.lang.reflect.Proxy;
import java.lang.reflect.UndeclaredThrowableException;
import java.util.Arrays;
import java.util.List;
import org.apache.wicket.Component;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.request.mapper.parameter.PageParameters;

/**
 *
 * @author mnn
 */
public abstract class RequiredConfigBehavior extends Behavior {

    private final List<Class> configurationClasses;
    private final ConfigurationItemFactory factory;

    public RequiredConfigBehavior(ConfigurationItemFactory factory, Class... configurationClassesToMonitor) {
        configurationClasses = Arrays.asList(configurationClassesToMonitor);
        this.factory = factory;
    }

    @Override
    public void beforeRender(Component component) {
        for (Class configClass : configurationClasses) {
            Object configurationItem = factory.getConfigurationItem(configClass);

            ManagedPropertiesController controller = (ManagedPropertiesController) Proxy
                    .getInvocationHandler(configurationItem);

            for (Attribute attribute : controller.getAttributes()) {
                if (attribute.getCardinalityDef().equals(Property.Cardinality.Required)) {
                    try {
                        if (controller.getConfigItem(attribute.getID()) == null) {
                            setResponsePage(component, controller.getID());
                            return;
                        }
                    } catch (UndeclaredThrowableException ex) {
                        if (ex.getCause() instanceof UnknownValueException) {
                            setResponsePage(component, controller.getID());
                            return;
                        } else
                            throw ex;

                    } catch (UnknownValueException ex) {
                        setResponsePage(component, controller.getID());
                        return;
                    }
                }
            }
        }
    }

    protected void setResponsePage(Component target, String id) {
        PageParameters params = new PageParameters();
        params.set(ConfigurationPage.CONFIGID, id);
        target.setResponsePage(getRedirectPage(), params);
    }

    protected abstract Class<? extends ConfigurationPage> getRedirectPage();

}