kenh.xscript.database.elements.Datasource.java Source code

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Here is the source code for kenh.xscript.database.elements.Datasource.java

Source

/*
 * xScript.database ( Database for XML Script Language)
 * Copyright 2015 and beyond, Kenneth Huang
 * 
 * This file is part of xScript.database.
 * 
 * xScript.database is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * as published by the Free Software Foundation.
 * 
 * xScript.database 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 Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with xScript.database.  If not, see <http://www.gnu.org/licenses/>. 
 */

package kenh.xscript.database.elements;

import org.apache.commons.dbcp2.BasicDataSourceFactory;
import org.apache.commons.lang3.StringUtils;

import kenh.xscript.annotation.*;
import kenh.xscript.impl.NormalElement;
import kenh.xscript.*;

import java.util.*;

import javax.sql.DataSource;

import kenh.xscript.elements.Param;
import kenh.xscript.elements.Set;

/**
 * Datasource element, create a datasource.
 * 
 * @author Kenneth
 * @version 1.0
 *
 */
@kenh.xscript.annotation.Include(Param.class)
@IgnoreSuperClass
public class Datasource extends Set {

    private static final String ATTRIBUTE_VARIABLE = "var"; // variable name

    public void process(@Attribute(ATTRIBUTE_VARIABLE) String var) throws UnsupportedScriptException {
        var = StringUtils.trimToEmpty(var);

        if (StringUtils.isBlank(var)) {
            UnsupportedScriptException ex = new UnsupportedScriptException(this, "Variable name is empty.");
            throw ex;
        }

        Properties properties = new Properties();

        this.invokeChildren();
        Vector<Element> children = this.getChildren();

        for (Element child : children) {
            if (child instanceof Param) {
                Param c = (Param) child;
                String name = c.getName();
                Object value = Param.getParsedValue(c);
                if (c.isLink()) {
                    String linkName = c.getLinkName();
                    if (!properties.containsKey(linkName))
                        new UnsupportedScriptException(this,
                                "Could not find the parameter to link. [" + name + ", " + linkName + "]");
                    value = properties.get(linkName);
                }

                properties.put(name, value);
            }
        }

        try {
            DataSource datasource = BasicDataSourceFactory.createDataSource(properties);
            this.saveVariable(var, datasource, null);

        } catch (Exception e) {
            throw new UnsupportedScriptException(this, e);
        }
    }

}