org.adl.util.EnvironmentVariable.java Source code

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Here is the source code for org.adl.util.EnvironmentVariable.java

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package org.adl.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import org.apache.commons.lang.StringUtils;

// xerces imports

// adl imports

/**
 * <strong>Filename:</strong><br>
 * EnvironmentVariable.java<br><br>
 *
 * <strong>Description:</strong><br>
 * A <code>EnvironmentVariable</code> is used to access a specified
 * environment variable.
     
 * @author ADL Technical Team
 */
public final class EnvironmentVariable {
    /**
     * Retrieves the value of the specified environment variable.
     *
     * @param iKey   Name of the environment variable.
     *
     * @return Value of the specified environment variable.
     */
    public static String getValue(String iKey) {
        String value = "";

        try {
            Process p;
            String osName = System.getProperty("os.name");

            if ((osName.equalsIgnoreCase("Windows 95")) || (osName.equalsIgnoreCase("Windows 98"))
                    || (osName.equalsIgnoreCase("Windows Me"))) {
                p = Runtime.getRuntime().exec("command.com /c echo %" + iKey + "%");
            } else {
                p = Runtime.getRuntime().exec("cmd.exe /c echo %" + iKey + "%");
            }

            p.waitFor();
            BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
            value = br.readLine();

            if (StringUtils.startsWith(value, "%")) {
                value = "";
            }

            br.close();
            p.destroy();
        } catch (IOException ioe) {
            System.out.println("Could not read environment variable key " + iKey);
        } catch (InterruptedException ie) {
            System.out.println("The process has been interrupted");
        }

        return value;
    }
}