}

    /**
     * Set local properties, e.g. via the "props" tag in XML bean definitions. These can be considered defaults, to be overridden by properties loaded from files.
     * 
     * @param properties
     *            the new properties
     */
    @Override
    public void setProperties(final Properties properties) {
	localProperties = new Properties[] { properties };
    }

    /**
     * Set local properties, e.g. via the "props" tag in XML bean definitions, allowing for merging multiple properties sets into one.
     * 
     * @param propertiesArray
     *            the new properties array
     */
    @Override
    public void setPropertiesArray(final Properties[] propertiesArray) {
	localProperties = propertiesArray;
    }

    /**
     * Creates the properties.
     * 
     * @return the prefixed properties
     */
    protected synchronized PrefixedProperties createProperties() {
	if (myProperties == null) {
	    PrefixedProperties resultProperties = null;
	    String environment = defaultPrefix;
	    if (environmentFactory != null) {
		environment = environmentFactory.getEnvironment();
	    } else if (defaultPrefixSystemPropertyKey != null) {
		environment = System.getProperty(defaultPrefixSystemPropertyKey);
		if (environment == null) {
		    if (logger.isWarnEnabled()) {
			logger.warn(String.format("Didn't found system property key to set default prefix: %1s", defaultPrefixSystemPropertyKey));
		    }
		}
	    }
	    if (prefixConfigList != null) {
		resultProperties = PrefixedProperties.createCascadingPrefixProperties(prefixConfigList);
	    } else {
		if (environment != null) {
		    resultProperties = PrefixedProperties.createCascadingPrefixProperties(environment);
		} else {
		    resultProperties = new PrefixedProperties();
		}
	    }
	    resultProperties.setDefaultPrefix(environment);
	    if (logger.isInfoEnabled()) {
		logger.info(String.format("Setting default prefix to: %1s", environment));
	    }
	    myProperties = resultProperties;
	}
	return myProperties;
    }

    /**
     * Load properties.
     * 
     * @param props
     *            the props
     * @throws IOException
     *             Signals that an I/O exception has occurred.
     */
    @Override
    protected void loadProperties(final Properties props) throws IOException {
	if (locations != null) {
	    for (int i = 0; i < locations.length; i++) {
		final Resource location = locations[i];
		if (logger.isInfoEnabled()) {
		    logger.info("Loading properties file from " + location);
		}
		File file = null;
		InputStream is = null;
		try {
		    try {
			file = location.getFile();
			is = new BufferedInputStream(new FileInputStream(file));
		    } catch (final IOException ie) {//ignore
		    } finally {
			if (file == null) {
			    is = location.getInputStream();
			}
		    }

		    if (location.getFilename().toLowerCase().endsWith(XML_FILE_EXTENSION)) {
			persister.loadFromXml(props, is);
		    } else if (location.getFilename().toLowerCase().endsWith(JSON_FILE_EXTENSION)) {
			if (fileEncoding != null) {
			    persister.loadFromJson(props, new InputStreamReader(is, Charset.forName(fileEncoding)));
			} else {
			    persister.loadFromJson(props, is);
			}
		    } else {
			if (fileEncoding != null) {
			    persister.load(props, new InputStreamReader(is, Charset.forName(fileEncoding)));
			} else {
			    persister.load(props, is);
			}
		    }
		} catch (final IOException ex) {
		    if (ignoreResourceNotFound) {
			if (logger.isWarnEnabled()) {
			    logger.warn("Could not load properties from " + location + ": " + ex.getMessage());
			}
		    } else {
			throw ex;
		    }
		} finally {
		    if (is != null) {
			is.close();
		    }
		}
	    }
	}
    }

    /* (non-Javadoc)
     * @see org.springframework.core.io.support.PropertiesLoaderSupport#mergeProperties()
     */
    @Override
    protected Properties mergeProperties() throws IOException {
	final PrefixedProperties myProperties = createProperties();
	if (localOverride) {
	    loadProperties(myProperties);
	}

	if (localProperties != null) {
	    for (int i = 0; i < localProperties.length; i++) {

		}
	    }
	    if (prefixConfigList != null) {
		resultProperties = PrefixedProperties.createCascadingPrefixProperties(prefixConfigList);
	    } else {
		if (environment != null) {
		    resultProperties = PrefixedProperties.createCascadingPrefixProperties(environment);
		} else {
		    resultProperties = new PrefixedProperties();
		}
	    }
	    resultProperties.setDefaultPrefix(environment);
	    if (logger.isInfoEnabled()) {
		logger.info(String.format("Setting default prefix to: %1s", environment));
	    }
	    myProperties = resultProperties;
	}
	return myProperties;
    }

    @Override
    protected void loadProperties(final Properties props) throws IOException {
	if (locations != null) {
	    for (int i = 0; i < locations.length; i++) {
		final Resource location = locations[i];
		if (logger.isInfoEnabled()) {
		    logger.info("Loading properties file from " + location);
		}
		File file = null;
		InputStream is = null;
		try {
		    try {
			file = location.getFile();
			is = new BufferedInputStream(new FileInputStream(file));
		    } catch (final IOException ie) {//ignore
		    } finally {
			if (file == null) {
			    is = location.getInputStream();
			}
		    }

		    if (location.getFilename().toLowerCase().endsWith(XML_FILE_EXTENSION)) {
			persister.loadFromXml(props, is);
		    } else if (location.getFilename().toLowerCase().endsWith(JSON_FILE_EXTENSION)) {
			if (fileEncoding != null) {
			    persister.loadFromJson(props, new InputStreamReader(is, Charset.forName(fileEncoding)));
			} else {
			    persister.loadFromJson(props, is);
			}
		    } else {
			if (fileEncoding != null) {
			    persister.load(props, new InputStreamReader(is, Charset.forName(fileEncoding)));
			} else {
			    persister.load(props, is);
			}
		    }
		} catch (final IOException ex) {
		    if (ignoreResourceNotFound) {
			if (logger.isWarnEnabled()) {
			    logger.warn("Could not load properties from " + location + ": " + ex.getMessage());

			    logger.warn("Could not load properties from " + location + ": " + ex.getMessage());
			}
		    } else {
			throw ex;
		    }
		} finally {
		    if (is != null) {
			is.close();
		    }
		}
	    }
	}
    }

    /* (non-Javadoc)
     * @see org.springframework.core.io.support.PropertiesLoaderSupport#mergeProperties()
     */
    @Override
    protected Properties mergeProperties() throws IOException {

	final PrefixedProperties myProperties = createProperties();

	if (localOverride) {
	    // Load properties from file upfront, to let local properties override.
	    loadProperties(myProperties);
	}
	if (localProperties != null) {
	    for (int i = 0; i < localProperties.length; i++) {
		final Properties props = localProperties[i];
		if (props != null) {
		    for (final Enumeration<Object> en = props.keys(); en.hasMoreElements();) {
			final Object key = en.nextElement();
			myProperties.put(key, props.get(key));
		    }
		}
	    }
	}
	if (!localOverride) {
	    // Load properties from file afterwards, to let those properties override.
	    loadProperties(myProperties);
	}

	return myProperties;
    }

}

    }

    /**
     * Sets the default prefix.
     * 
     * @param defaultPrefix
     *            the new default prefix
     */
    public void setDefaultPrefix(final String defaultPrefix) {
	this.defaultPrefix = defaultPrefix;
    }

    /**
     * Sets this method to specify a system property to be used as an environment. The value of the property will be used for setting the default prefix.
     * {@link PrefixedProperties#setDefaultPrefix(String)}
     * 
     * @param defaultPrefixSystemPropertyKey
     *            the new ddefault prefix system property key
     */
    public void setDefaultPrefixSystemPropertyKey(final String defaultPrefixSystemPropertyKey) {
	this.defaultPrefixSystemPropertyKey = defaultPrefixSystemPropertyKey;
    }

    /**
     * Sets the environment factory.
     * 
     * @param environmentFactory
     *            the new environment factory
     */
    public void setEnvironmentFactory(final EnvironmentFactory environmentFactory) {
	this.environmentFactory = environmentFactory;
    }

    /* (non-Javadoc)
     * @see org.springframework.core.io.support.PropertiesLoaderSupport#setFileEncoding(java.lang.String)
     */
    @Override
    public void setFileEncoding(final String encoding) {
	fileEncoding = encoding;
    }

    /* (non-Javadoc)
     * @see org.springframework.core.io.support.PropertiesLoaderSupport#setIgnoreResourceNotFound(boolean)
     */
    @Override
    public void setIgnoreResourceNotFound(final boolean ignoreResourceNotFound) {
	this.ignoreResourceNotFound = ignoreResourceNotFound;
    }

    /* (non-Javadoc)
     * @see org.springframework.core.io.support.PropertiesLoaderSupport#setLocalOverride(boolean)
     */
    @Override
    public void setLocalOverride(final boolean localOverride) {
	this.localOverride = localOverride;
    }

    /**
     * Set a location of a properties file to be loaded.
     * <p>
     * Can point to a classic properties, json or XML file that follows JDK 1.5's properties XML format.
     * 
     * @param location
     *            the new location
     */
    @Override
    public void setLocation(final Resource location) {
	locations = new Resource[] { location };
    }

    /* (non-Javadoc)
     * @see org.springframework.core.io.support.PropertiesLoaderSupport#setLocations(org.springframework.core.io.Resource[])
     */
    @Override
    public void setLocations(final Resource[] locations) {
	this.locations = locations;
    }

    /**
     * Sets the prefix configs to build up a {@link PrefixedProperties}-Structure.
     * 
     * @param configList
     *            the new prefix configs
     */
    public void setPrefixConfigs(final List<PrefixConfig> configList) {
	prefixConfigList = configList;
    }

    }

    /**
     * Sets the default prefix.
     * 
     * @param defaultPrefix
     *            the new default prefix
     */
    public void setDefaultPrefix(final String defaultPrefix) {
	this.defaultPrefix = defaultPrefix;
    }

    /**
     * Sets this method to specify a system property to be used as an environment. The value of the property will be used for setting the default prefix.
     * {@link PrefixedProperties#setDefaultPrefix(String)}
     * 
     * @param defaultPrefixSystemPropertyKey
     *            the new ddefault prefix system property key
     */
    public void setDefaultPrefixSystemPropertyKey(final String defaultPrefixSystemPropertyKey) {
	this.defaultPrefixSystemPropertyKey = defaultPrefixSystemPropertyKey;
    }

    /**
     * Sets the environment factory.
     * 
     * @param environmentFactory
     *            the new environment factory
     */
    public void setEnvironmentFactory(final EnvironmentFactory environmentFactory) {
	this.environmentFactory = environmentFactory;
    }

    /**
     * Set the encoding to use for parsing properties files.
     * <p>
     * Default is none, using the <code>java.util.Properties</code> default encoding.
     * <p>
     * Only applies to classic properties files, not to XML files.
     * 
     * @param encoding
     *            the new file encoding
     * @see org.springframework.util.PropertiesPersister#load
     */
    @Override
    public void setFileEncoding(final String encoding) {
	fileEncoding = encoding;
    }

    /**
     * Set if failure to find the property resource should be ignored.
     * <p>
     * "true" is appropriate if the properties file is completely optional. Default is "false".
     * 
     * @param ignoreResourceNotFound
     *            the new ignore resource not found
     */
    @Override
    public void setIgnoreResourceNotFound(final boolean ignoreResourceNotFound) {
	this.ignoreResourceNotFound = ignoreResourceNotFound;
    }

    /* (non-Javadoc)
     * @see org.springframework.core.io.support.PropertiesLoaderSupport#setLocalOverride(boolean)
     */
    @Override
    public void setLocalOverride(final boolean localOverride) {
	this.localOverride = localOverride;
    }

    /**
     * Set a location of a properties file to be loaded.
     * <p>
     * Can point to a classic properties file or to an XML file that follows JDK 1.5's properties XML format.
     * 
     * @param location
     *            the new location
     */
    @Override
    public void setLocation(final Resource location) {
	locations = new Resource[] { location };
    }