com.jain.addon.component.crud.JCrudGrid.java Source code

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Here is the source code for com.jain.addon.component.crud.JCrudGrid.java

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/* 
 * Copyright 2012 Lokesh Jain.
 * 
 * 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 com.jain.addon.component.crud;

import java.util.Collection;

import com.jain.addon.JNEventConstants;
import com.jain.addon.JNIComponentInit;
import com.jain.addon.event.Events;
import com.jain.addon.web.bean.JNIProperty;
import com.jain.addon.web.bean.annotation.processor.JAnnotationProcessor;
import com.jain.addon.web.bean.container.JainBeanItemContainer;
import com.jain.addon.web.table.JTable;
import com.vaadin.data.Container;
import com.vaadin.data.Property.ValueChangeEvent;
import com.vaadin.data.Property.ValueChangeListener;
import com.vaadin.ui.VerticalLayout;

/**
 * <code>JCrudGrid<code> Grid for Crud component
 * @author Lokesh Jain
 * @since Nov 27, 2012
 * @version 1.1.0
 * @param <T>
 *
 */
@SuppressWarnings("serial")
public class JCrudGrid<T> extends VerticalLayout implements ValueChangeListener {
    private JTable table;
    private T selected;
    private Collection<T> values;
    private Class<T> type;
    private int pageLength = 5;

    @JNIComponentInit
    public void init() {
        table = new JTable(getContainer(), getProperties());
        table.addValueChangeListener(this);
        table.setPageLength(pageLength);
        addComponent(table);
    }

    private Container getContainer() {
        JainBeanItemContainer<T> container = new JainBeanItemContainer<T>(getType());
        updateContainer(container);
        return container;
    }

    private void updateContainer(JainBeanItemContainer<T> container) {
        if (values != null)
            container.addAll(values);
    }

    private JNIProperty[] getProperties() {
        return JAnnotationProcessor.instance().getProperties(getType()).getProperties().toArray(new JNIProperty[0]);
    }

    @SuppressWarnings("unchecked")
    public void reload(T value) {
        values.remove(value);
        values.add(value);
        JainBeanItemContainer<T> container = (JainBeanItemContainer<T>) table.getContainerDataSource();
        container.removeItem(value);
        container.addItem(value);
        Events.instance().raiseEvent(getUI(), type.getCanonicalName() + JNEventConstants.CREATED_OR_UPDATED, value);
    }

    @SuppressWarnings("unchecked")
    public void valueChange(ValueChangeEvent event) {
        selected = (T) event.getProperty().getValue();
    }

    @SuppressWarnings("unchecked")
    public void delete() {
        values.remove(getSelected());
        JainBeanItemContainer<T> container = (JainBeanItemContainer<T>) table.getContainerDataSource();
        container.removeItem(selected);
        Events.instance().raiseEvent(getUI(), type.getCanonicalName() + JNEventConstants.DELETED, selected);
    }

    public T getSelected() {
        return selected;
    }

    public Collection<T> getValues() {
        return values;
    }

    public void setValues(Collection<T> values) {
        this.values = values;
    }

    public Class<T> getType() {
        return type;
    }

    public void setType(Class<T> type) {
        this.type = type;
    }

    public int getPageLength() {
        return pageLength;
    }

    public void setPageLength(int pageLength) {
        this.pageLength = pageLength > 0 ? pageLength : 5;
    }
}