org.formic.ant.Property.java Source code

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Here is the source code for org.formic.ant.Property.java

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/**
 * Formic installer framework.
 * Copyright (C) 2005 - 2010  Eric Van Dewoestine
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package org.formic.ant;

import java.io.IOException;
import java.io.InputStream;

import java.util.Enumeration;
import java.util.Properties;

import org.apache.commons.io.IOUtils;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.Task;

import org.formic.Installer;

/**
 * Ant task mimicing ant's property task but allowing a property file to be
 * loaded from the installer classpath.
 *
 * @author Eric Van Dewoestine
 */
public class Property extends Task {
    private String resource;

    /**
     * Executes this task.
     */
    public void execute() throws BuildException {
        InputStream in = Installer.class.getResourceAsStream(resource);
        if (in == null) {
            throw new BuildException("Resource not found: " + resource);
        }

        try {
            Project project = getProject();
            Properties properties = new Properties();
            properties.load(in);
            Enumeration keys = properties.keys();
            while (keys.hasMoreElements()) {
                String key = (String) keys.nextElement();
                project.setProperty(key, properties.getProperty(key));
            }
        } catch (IOException ioe) {
            throw new BuildException(ioe);
        } finally {
            IOUtils.closeQuietly(in);
        }
    }

    /**
     * Sets the property file resource to load.
     *
     * @param resource The resource.
     */
    public void setResource(String resource) {
        this.resource = resource;
    }
}