com.esspl.datagen.ui.ResultSetTable.java Source code

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Here is the source code for com.esspl.datagen.ui.ResultSetTable.java

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/**
 * Copyright (C) 2012 Enterprise System Solutions (P) Ltd. All rights reserved.
 *
 * This file is part of DATA Gen. http://testdatagen.sourceforge.net/
 *
 * DATA Gen is a free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * DATA Gen is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package com.esspl.datagen.ui;

import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

import org.apache.log4j.Logger;

import com.vaadin.data.Container;
import com.vaadin.data.Item;
import com.vaadin.data.util.IndexedContainer;
import com.vaadin.ui.Component;
import com.vaadin.ui.CustomComponent;
import com.vaadin.ui.Label;
import com.vaadin.ui.Table;
import com.vaadin.ui.VerticalLayout;

/**
 *@author Tapas
 *
 */
@SuppressWarnings("serial")
public class ResultSetTable extends CustomComponent {

    private static final Logger log = Logger.getLogger(ResultSetTable.class);
    private final Table table;

    public ResultSetTable(ResultSet resultSet) {
        this(resultSet, null);
    }

    public ResultSetTable(ResultSet resultSet, List<String> columns) {
        setSizeFull();

        VerticalLayout vl = new VerticalLayout();
        vl.setSizeFull();
        setCompositionRoot(vl);

        Component content;
        try {
            content = createResultsTable(resultSet, columns);
        } catch (Exception ex) {
            content = new Label("Failed to process supplied result set: " + ex.getMessage());
        }

        vl.addComponent(content);

        if (content instanceof Table)
            table = (Table) content;
        else
            table = null;
    }

    public Collection<?> getItemIds() {
        return null != table ? table.getItemIds() : Collections.emptyList();
    }

    protected Table createResultsTable(ResultSet rs, List<String> columns) throws SQLException {
        ResultSetMetaData md = rs.getMetaData();
        Container c = new IndexedContainer();
        for (int i = 0; i < md.getColumnCount(); ++i) {
            String label = md.getColumnLabel(i + 1);
            if (null == columns || columns.contains(label)) {
                Class<?> clazz = getClassForSqlType(md.getColumnClassName(i + 1));
                c.addContainerProperty(label, clazz, null);
            }
        }

        int i = 0;
        while (rs.next()) {
            Item item = c.addItem(i++);
            for (Object propertyId : c.getContainerPropertyIds()) {
                item.getItemProperty(propertyId).setValue(rs.getObject(propertyId.toString()));
            }
        }

        Table t = new Table(null, c);
        t.setSizeFull();
        t.setPageLength(50);
        t.setColumnReorderingAllowed(true);
        t.setColumnCollapsingAllowed(true);
        t.setSelectable(true);
        return t;
    }

    protected Class<?> getClassForSqlType(String name) {
        try {
            return Class.forName(name);
        } catch (Exception ex) {
            log.error("unable to get class for name " + name, ex);
            return null;
        }
    }
}