org.apache.pig.tools.parameters
Class PreprocessorContext

java.lang.Object
  org.apache.pig.tools.parameters.PreprocessorContext

public class PreprocessorContext
extends Object

Constructor Summary

PreprocessorContext(int limit)

Method Summary

void	processOrdLine(String key, String val) This method generates value for the specified key by performing substitution if needed within the value first.
void	processOrdLine(String key, String val, Boolean overwrite) This method generates value for the specified key by performing substitution if needed within the value first.
void	processShellCmd(String key, String val) This method generates parameter value by running specified command
void	processShellCmd(String key, String val, Boolean overwrite) This method generates parameter value by running specified command
String	substitute(String line)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PreprocessorContext

public PreprocessorContext(int limit)

Parameters:

limit - - max number of parameters. Passing smaller number only impacts performance

Method Detail

processShellCmd

public void processShellCmd(String key,
                            String val)

This method generates parameter value by running specified command

Parameters:

key - - parameter name

val - - string containing command to be executed

processOrdLine

public void processOrdLine(String key,
                           String val)

This method generates value for the specified key by performing substitution if needed within the value first.

Parameters:

key - - parameter name

val - - value supplied for the key

processShellCmd

public void processShellCmd(String key,
                            String val,
                            Boolean overwrite)

This method generates parameter value by running specified command

Parameters:

key - - parameter name

val - - string containing command to be executed

processOrdLine

public void processOrdLine(String key,
                           String val,
                           Boolean overwrite)

This method generates value for the specified key by performing substitution if needed within the value first.

Parameters:

key - - parameter name

val - - value supplied for the key

overwrite - - specifies whether the value should be replaced if it already exists

substitute

public String substitute(String line)