How to use cascading.property

/**
 * Method buildProperties returns a new {@link Properties} instance with all property values for this type
 * using the given Iterable<Map.Entry<String, String>> of property values as defaults. The given Iterable will not be modified.
 * <p>
 * If no values have been set, all default properties and values will be returned.
 *
 * @return a new Properties instance
 */
public Properties buildProperties( Iterable<Map.Entry<String, String>> defaultProperties )
 {
 return buildProperties( PropertyUtil.createProperties( defaultProperties ) );
 }

public static String getApplicationID( Map<Object, Object> properties )
 {
 if( properties == null )
  return getAppID();
 return PropertyUtil.getProperty( properties, APP_ID, getAppID() );
 }

/**
 * Returns {@code true} if there are properties in the configDef instance.
 *
 * @return true if there are configDef properties
 */
@Override
public boolean hasConfigDef()
 {
 return configDef != null && !configDef.isEmpty();
 }

@Override
protected void addPropertiesTo( Properties properties )
 {
 setApplicationID( properties );
 setApplicationName( properties, name );
 setApplicationVersion( properties, version );
 addApplicationTag( properties, getTags() );
 addApplicationFramework( properties, getFrameworks() );
 setApplicationJarClass( properties, jarClass );
 setApplicationJarPath( properties, jarPath );
 }
}

@Override
public String get( String key )
 {
 return getProperty( properties, key );
 }
} );

public ConfigDef setProperties( ConfigDef configDef, ConfigDef.Mode mode )
 {
 Properties properties = buildProperties();
 for( String name : properties.stringPropertyNames() )
  configDef.setProperty( mode, name, properties.getProperty( name ) );
 return configDef;
 }

/**
 * Method setProperty sets the value to the given key using the {@link Mode#REPLACE} mode.
 *
 * @param key   the key
 * @param value the value
 * @return the current ConfigDef instance
 */
public ConfigDef setProperty( String key, String value )
 {
 return setProperty( Mode.REPLACE, key, value );
 }

protected void addSessionProperties( Map<Object, Object> properties )
 {
 if( properties == null )
  return;
 PropertyUtil.setProperty( properties, CASCADING_FLOW_ID, getID() );
 PropertyUtil.setProperty( properties, "cascading.flow.tags", getTags() );
 AppProps.setApplicationID( properties );
 PropertyUtil.setProperty( properties, "cascading.app.name", makeAppName( properties ) );
 PropertyUtil.setProperty( properties, "cascading.app.version", makeAppVersion( properties ) );
 }

@Override
public Map<Object, Object> getProperties()
 {
 return PropertyUtil.asFlatMap( properties );
 }

/**
 * Method buildProperties returns a new {@link Properties} instance with all property values for this type.
 * <p>
 * If no values have been set, all default properties and values will be returned.
 *
 * @return a new Properties instance
 */
public Properties buildProperties()
 {
 return buildProperties( (Properties) null );
 }

@Override
public Object getProperty( String key )
 {
 return configDef.apply( key, getter );
 }

/**
 * Creates a new AppProps instance.
 *
 * @return AppProps instance
 */
public static AppProps appProps()
 {
 return new AppProps();
 }

public static String getApplicationName( Map<Object, Object> properties )
 {
 return PropertyUtil.getProperty( properties, APP_NAME, (String) null );
 }

/**
 * Method buildProperties returns a new {@link Properties} instance with all property values for this type
 * using the given Map of property values as defaults. The given Map will not be modified.
 * <p>
 * If no values have been set, all default properties and values will be returned.
 *
 * @return a new Properties instance
 */
public Properties buildProperties( Map<Object, Object> defaultProperties )
 {
 return buildProperties( PropertyUtil.createProperties( defaultProperties, null ) );
 }

/**
 * Returns {@code true} if there are properties in the stepConfigDef instance.
 *
 * @return true if there are stepConfigDef properties
 */
@Override
public boolean hasStepConfigDef()
 {
 return stepConfigDef != null && !stepConfigDef.isEmpty();
 }

public static String getApplicationVersion( Map<Object, Object> properties )
 {
 return PropertyUtil.getProperty( properties, APP_VERSION, (String) null );
 }

/**
 * Returns {@code true} if there are properties in the configDef instance.
 *
 * @return true if there are configDef properties
 */
public boolean hasConfigDef()
 {
 return configDef != null && !configDef.isEmpty();
 }

/**
 * Returns {@code true} if there are properties in the stepConfigDef instance.
 *
 * @return true if there are stepConfigDef properties
 */
@Override
public boolean hasStepConfigDef()
 {
 return stepConfigDef != null && !stepConfigDef.isEmpty();
 }

/**
 * Returns {@code true} if there are properties in the nodeConfigDef instance.
 *
 * @return true if there are nodeConfigDef properties
 */
@Override
public boolean hasNodeConfigDef()
 {
 return nodeConfigDef != null && !nodeConfigDef.isEmpty();
 }

/**
 * Returns {@code true} if there are properties in the nodeConfigDef instance.
 *
 * @return true if there are nodeConfigDef properties
 */
@Override
public boolean hasNodeConfigDef()
 {
 return nodeConfigDef != null && !nodeConfigDef.isEmpty();
 }