Examples of org.apache.commons.configuration.Configuration

Package org.apache.commons.configuration

Examples of org.apache.commons.configuration.Configuration

org.apache.commons.configuration.Configuration

The main Configuration interface.

This interface allows accessing and manipulating a configuration object. The major part of the methods defined in this interface deals with accessing properties of various data types. There is a generic getProperty() method, which returns the value of the queried property in its raw data type. Other getter methods try to convert this raw data type into a specific data type. If this fails, a ConversionException will be thrown.

For most of the property getter methods an overloaded version exists that allows to specify a default value, which will be returned if the queried property cannot be found in the configuration. The behavior of the methods that do not take a default value in case of a missing property is not defined by this interface and depends on a concrete implementation. E.g. the {@link AbstractConfiguration} class, which is the base class of most configuration implementations provided by this package, per default returns null if a property is not found, but provides the {@link org.apache.commons.configuration.AbstractConfiguration#setThrowExceptionOnMissing(boolean) setThrowExceptionOnMissing()} method, with which it can be configured to throw a NoSuchElementException exception in that case. (Note that getter methods for primitive types in AbstractConfiguration always throw an exception for missing properties because there is no way of overloading the return value.)

With the addProperty() and setProperty() methods new properties can be added to a configuration or the values of properties can be changed. With clearProperty() a property can be removed. Other methods allow to iterate over the contained properties or to create a subset configuration.
@author Commons Configuration team @version $Id: Configuration.java 1153984 2011-08-04 19:57:03Z oheger $

    private PerUserPoolDataSource initJdbc2Pool(Configuration configuration)
        throws TorqueException
    {
        log.debug("Starting initJdbc2Pool");
        PerUserPoolDataSource ds = new PerUserPoolDataSource();
        Configuration c = Torque.getConfiguration();


        if (c == null)
        {
            log.warn("Global Configuration not set,"
                    + " no Default pool data source configured!");
        }
        else
        {
            Configuration conf = c.subset(DEFAULT_POOL_KEY);
            applyConfiguration(conf, ds);
        }


        Configuration conf = configuration.subset(POOL_KEY);
        applyConfiguration(conf, ds);
        return ds;
    }

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        // test the postgresql variation
        c = new Criteria();
        Criteria.Criterion cc =
            c.getNewCriterion("TABLE.COLUMN", Boolean.TRUE, Criteria.EQUAL);


        Configuration conf = new BaseConfiguration();
        conf.addProperty("driver", "org.postgresql.Driver");
        try
        {
            cc.setDB(DBFactory.create("org.postgresql.Driver"));
        }
        catch (Exception e)

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        // get configuration property
        Object result = getConfiguration().getProperty(name);
        if (result == null)
        {
            // otherwise attempt to create bean from configuration subset
            Configuration subset = new SubsetConfiguration(getConfiguration(), name, PROPERTY_DELIMITER);
            if (!subset.isEmpty())
            {
                result = new ConfigurationDynaBean(subset);
            }
        }

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        return result;
    }


    public boolean contains(String name, String key)
    {
        Configuration subset = getConfiguration().subset(name);
        if (subset == null)
        {
            throw new IllegalArgumentException("Mapped property '" + name + "' does not exist.");
        }


        return subset.containsKey(key);
    }

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        }
    }


    public Object get(String name, String key)
    {
        Configuration subset = getConfiguration().subset(name);
        if (subset == null)
        {
            throw new IllegalArgumentException("Mapped property '" + name + "' does not exist.");
        }


        return subset.getProperty(key);
    }

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        return new ConfigurationDynaClass(getConfiguration());
    }


    public void remove(String name, String key)
    {
        Configuration subset = new SubsetConfiguration(getConfiguration(), name, PROPERTY_DELIMITER);
        subset.setProperty(key, null);
    }

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        else if (value instanceof Configuration)
        {
            // display a flat Configuration as a dictionary
            out.println(padding + "<dict>");


            Configuration config = (Configuration) value;
            Iterator it = config.getKeys();
            while (it.hasNext())
            {
                // create a node for each property
                String key = (String) it.next();
                Node node = new Node(key);
                node.setValue(config.getProperty(key));


                // print the node
                printNode(out, indentLevel + 1, node);


                if (it.hasNext())

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        {
            // display a flat Configuration as a dictionary
            out.println();
            out.println(padding + "{");


            Configuration config = (Configuration) value;
            Iterator it = config.getKeys();
            while (it.hasNext())
            {
                String key = (String) it.next();
                Node node = new Node(key);
                node.setValue(config.getProperty(key));


                printNode(out, indentLevel + 1, node);
                out.println(";");
            }
            out.println(padding + "}");

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    /**
     * Set up instance variables required by this test case.
     */
    public void setUp() throws Exception
    {
        Configuration configuration = createConfiguration();


        for (int i = 0; i < properties.length; i++)
        {
            configuration.setProperty(properties[i], values[i]);
        }


        for (int a = 0; a < intArray.length; a++)
        {
            configuration.addProperty("intIndexed", new Integer(intArray[a]));
        }


        for (int a = 0; a < stringArray.length; a++)
        {
            configuration.addProperty("stringIndexed", stringArray[a]);
        }


        List list = new ArrayList();
        for (int i = 0; i < stringArray.length; i++)
        {
            list.add(stringArray[i]);
        }
        configuration.addProperty("listIndexed", list);


        bean = new ConfigurationDynaBean(configuration);


        bean.set("listIndexed", list);
        bean.set("intArray", intArray);

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        // that may be contained in the configuration we will make the
        // configuration consist only of the remain torque specific
        // properties that are contained in the configuration. First
        // look for properties that are in the "torque" namespace.


        Configuration subConf = conf.subset(Torque.TORQUE_KEY);
        if (subConf == null || subConf.isEmpty())
        {
            String error = ("Invalid configuration. No keys starting with "
                    + Torque.TORQUE_KEY
                    + " found in configuration");
            log.error(error);

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