org.maverickdbms.basic
Class DefaultResolver

java.lang.Object
  org.maverickdbms.basic.DefaultResolver

All Implemented Interfaces:

Program, Resolver, Variable

public class DefaultResolver

extends java.lang.Object

implements Program, Resolver

Default resolver implemenation. Just trys classpath to find programs

Field Summary

Fields inherited from interface org.maverickdbms.basic.Resolver

DEFAULT_REGISTER_FILE_OPENS, DEFAULT_REGISTER_RESOLVER, PROP_REGISTER_FILE_OPENS, PROP_REGISTER_RESOLVER

Constructor Summary

DefaultResolver()

Method Summary

void	createFile(ConstantString type, ConstantString name, int flags, ConstantString[] fields) Create the specified file.
void	deleteList(ConstantString name, mvString status) Removes the specified list.
void	dropFile(ConstantString type, ConstantString name) Removes the specified file.
Resolver	getNextResolver() Gets the next resolver in the chain
Program	resolveCommand(ConstantString command) Resolve the specified command
ConstantString	resolveFile(Program program, mvString var, ConstantString type, ConstantString name, int flags, mvString status) Find and open the specified file.
ConstantString	resolveList(mvString var, mvString count, ConstantString name, mvString status) Resolve the specified list
Program	resolveProgram(ConstantString name) Resolve the specified program
ConstantString	run(Session session, mvString[] args)
void	setNextResolver(Resolver next) Sets the next resolver in the chain
void	writeList(ConstantString var, ConstantString record, mvString status) Write the specified item as a list

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultResolver

public DefaultResolver()

Method Detail

createFile

public void createFile(ConstantString type,
                       ConstantString name,
                       int flags,
                       ConstantString[] fields)
                throws mvException

Description copied from interface: Resolver

Create the specified file.

Specified by:

createFile in interface Resolver

Parameters:

type - the type of the file.

name - the name of the file

flags - optional flags

fields - extra arguments needed for file creation

Throws:

mvException

deleteList

public void deleteList(ConstantString name,
                       mvString status)
                throws mvException

Description copied from interface: Resolver

Removes the specified list.

Specified by:

deleteList in interface Resolver

Parameters:

name - the list to remove.

status - the status variable to set on success

Throws:

mvException

dropFile

public void dropFile(ConstantString type,
                     ConstantString name)
              throws mvException

Description copied from interface: Resolver

Removes the specified file.

Specified by:

dropFile in interface Resolver

Parameters:

type - the type of the file.

name - the name of the file.

Throws:

mvException

getNextResolver

public Resolver getNextResolver()

Description copied from interface: Resolver

Gets the next resolver in the chain

Specified by:

getNextResolver in interface Resolver

Returns:

the next resolver or null

resolveFile

public ConstantString resolveFile(Program program,
                                  mvString var,
                                  ConstantString type,
                                  ConstantString name,
                                  int flags,
                                  mvString status)
                           throws mvException

Description copied from interface: Resolver

Find and open the specified file.

Specified by:

resolveFile in interface Resolver

Parameters:

program - the program opening the specified file

type - the type of file to open

name - the name of the file to open

flags - any optional flags

status - the status variable to set on success

Throws:

mvException

resolveCommand

public Program resolveCommand(ConstantString command)
                       throws mvException

Description copied from interface: Resolver

Resolve the specified command

Specified by:

resolveCommand in interface Resolver

Parameters:

command - the command to parse

Returns:

the program representing the parsed command

Throws:

mvException

resolveList

public ConstantString resolveList(mvString var,
                                  mvString count,
                                  ConstantString name,
                                  mvString status)
                           throws mvException

Description copied from interface: Resolver

Resolve the specified list

Specified by:

resolveList in interface Resolver

Parameters:

var - the variable to contain the resulting list

count - the number of elements in the list

name - the name of the list

status - the status variable to set on success

Returns:

whether the list was successfully resolved

Throws:

mvException

resolveProgram

public Program resolveProgram(ConstantString name)
                       throws mvException

Description copied from interface: Resolver

Resolve the specified program

Specified by:

resolveProgram in interface Resolver

Parameters:

name - the name of the program

Returns:

the program

Throws:

mvException

run

public ConstantString run(Session session,
                          mvString[] args)

Specified by:

run in interface Program

setNextResolver

public void setNextResolver(Resolver next)

Description copied from interface: Resolver

Sets the next resolver in the chain

Specified by:

setNextResolver in interface Resolver

Parameters:

next - the next resolver

writeList

public void writeList(ConstantString var,
                      ConstantString record,
                      mvString status)
               throws mvException

Description copied from interface: Resolver

Write the specified item as a list

Specified by:

writeList in interface Resolver

Parameters:

var - the item to write

record - the name to store the list under

status - the status variable to set on success

Throws:

mvException