org.apache.ace.target.mgmt.ui/src/org/apache/ace/target/management/ui/TargetManagementExtension.java

/*
 * 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 org.apache.ace.target.management.ui;

import java.util.Map;

import org.apache.ace.client.repository.stateful.StatefulTargetObject;
import org.apache.ace.client.repository.stateful.StatefulTargetObject.ApprovalState;
import org.apache.ace.webui.UIExtensionFactory;

import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.CheckBox;
import com.vaadin.ui.Component;
import com.vaadin.ui.GridLayout;
import com.vaadin.ui.Label;

/**
 * Provides a simple management UI for targets.
 */
public class TargetManagementExtension implements UIExtensionFactory {

    private static final String CAPTION = "Management";

    public Component create(Map<String, Object> context) {
        GridLayout result = new GridLayout(1, 4);
        result.setCaption(CAPTION);

        result.setMargin(true);
        result.setSpacing(true);
        result.setSizeFull();

        final StatefulTargetObject target = getRepositoryObjectFromContext(context);

        final CheckBox registerCB = new CheckBox("Registered?");
        registerCB.setImmediate(true);
        registerCB.setEnabled(!target.isRegistered());
        registerCB.setValue(Boolean.valueOf(target.isRegistered()));

        result.addComponent(registerCB);

        final CheckBox autoApproveCB = new CheckBox("Auto approve?");
        autoApproveCB.setImmediate(true);
        autoApproveCB.setEnabled(target.isRegistered());
        autoApproveCB.setValue(Boolean.valueOf(target.getAutoApprove()));

        result.addComponent(autoApproveCB);

        final Button approveButton = new Button("Approve changes");
        approveButton.setImmediate(true);
        approveButton.setEnabled(getApproveButtonEnabledState(target));

        result.addComponent(approveButton);

        // Add a spacer that fill the remainder of the available space...
        result.addComponent(new Label(" "));
        result.setRowExpandRatio(3, 1.0f);

        // Add all listeners...
        registerCB.addListener(new Button.ClickListener() {
            public void buttonClick(ClickEvent event) {
                if (event.getButton().booleanValue()) {
                    target.register();
                    registerCB.setEnabled(!target.isRegistered());
                    autoApproveCB.setEnabled(target.isRegistered());
                }
            }
        });
        autoApproveCB.addListener(new Button.ClickListener() {
            public void buttonClick(ClickEvent event) {
                target.setAutoApprove(event.getButton().booleanValue());
                approveButton.setEnabled(getApproveButtonEnabledState(target));
            }
        });
        approveButton.addListener(new Button.ClickListener() {
            public void buttonClick(ClickEvent event) {
                target.approve();
                approveButton.setEnabled(getApproveButtonEnabledState(target));
            }
        });

        return result;
    }

    private boolean getApproveButtonEnabledState(StatefulTargetObject target) {
        return ApprovalState.Unapproved.equals(target.getApprovalState()) && target.needsApprove();
    }

    private StatefulTargetObject getRepositoryObjectFromContext(Map<String, Object> context) {
        return (StatefulTargetObject) context.get("object");
    }
}