org.python.core

Class ArgParser

java.lang.Object

org.python.core.ArgParser

public class ArgParser
extends java.lang.Object

A utility class for handling mixed positional and keyword arguments. Typical usage:

   public MatchObject search(PyObject[] args, String[] kws) {
       ArgParser ap = new ArgParser("search", args, kws,
                                    "pattern", "pos", "endpos");
       String string = ap.getString(0);
       int start     = ap.getInt(1, 0);
       int end       = ap.getInt(2, string.length());
       ...
 

Constructor Summary

Constructors

Constructor and Description
ArgParser(java.lang.String funcname, PyObject[] args, java.lang.String[] kws, java.lang.String p0) Create an ArgParser for a one-argument function.
ArgParser(java.lang.String funcname, PyObject[] args, java.lang.String[] kws, java.lang.String[] paramnames) Create an ArgParser for a multi-argument function.
ArgParser(java.lang.String funcname, PyObject[] args, java.lang.String[] kws, java.lang.String[] paramnames, int minargs)
ArgParser(java.lang.String funcname, PyObject[] args, java.lang.String[] kws, java.lang.String[] paramnames, int minargs, boolean takesZeroArgs)
ArgParser(java.lang.String funcname, PyObject[] args, java.lang.String[] kws, java.lang.String p0, java.lang.String p1) Create an ArgParser for a two-argument function.
ArgParser(java.lang.String funcname, PyObject[] args, java.lang.String[] kws, java.lang.String p0, java.lang.String p1, java.lang.String p2) Create an ArgParser for a three-argument function.

Method Summary

Modifier and Type	Method and Description
int	getIndex(int pos) Return an required argument as an index.
int	getIndex(int pos, int def) Return an optional argument as an index.
int	getInt(int pos) Return a required argument as an int.
int	getInt(int pos, int def) Return an optional argument as an int.
PyObject	getList(int pos) Return the remaining arguments as a tuple.
PyObject	getPyObject(int pos) Return a required argument as a PyObject.
PyObject	getPyObject(int pos, PyObject def) Return an optional argument as a PyObject.
PyObject	getPyObjectByType(int pos, PyType type) Return a required argument as a PyObject, ensuring the object is of the specified type.
PyObject	getPyObjectByType(int pos, PyType type, PyObject def) Return an optional argument as a PyObject, or return the default value provided, which may be null.
java.lang.String	getString(int pos) Return a required argument as a String.
java.lang.String	getString(int pos, java.lang.String def) Return an optional argument as a String.
void	noKeywords() Ensure no keyword arguments were passed, raising a TypeError if so.

Methods inherited from class java.lang.Object

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

Constructor Detail

ArgParser

public ArgParser(java.lang.String funcname,
                 PyObject[] args,
                 java.lang.String[] kws,
                 java.lang.String p0)

Create an ArgParser for a one-argument function.

Parameters:

funcname - Name of the function. Used in error messages.

args - The actual call arguments supplied in the call.

kws - The actual keyword names supplied in the call.

p0 - The expected argument in the function definition.

ArgParser

public ArgParser(java.lang.String funcname,
                 PyObject[] args,
                 java.lang.String[] kws,
                 java.lang.String p0,
                 java.lang.String p1)

Create an ArgParser for a two-argument function.

Parameters:

funcname - Name of the function. Used in error messages.

args - The actual call arguments supplied in the call.

kws - The actual keyword names supplied in the call.

p0 - The first expected argument in the function definition.

p1 - The second expected argument in the function definition.

ArgParser

public ArgParser(java.lang.String funcname,
                 PyObject[] args,
                 java.lang.String[] kws,
                 java.lang.String p0,
                 java.lang.String p1,
                 java.lang.String p2)

Create an ArgParser for a three-argument function.

Parameters:

funcname - Name of the function. Used in error messages.

args - The actual call arguments supplied in the call.

kws - The actual keyword names supplied in the call.

p0 - The first expected argument in the function definition.

p1 - The second expected argument in the function definition.

p2 - The third expected argument in the function definition.

ArgParser

public ArgParser(java.lang.String funcname,
                 PyObject[] args,
                 java.lang.String[] kws,
                 java.lang.String[] paramnames)

Create an ArgParser for a multi-argument function.

Parameters:

funcname - Name of the function. Used in error messages.

args - The actual call arguments supplied in the call.

kws - The actual keyword names supplied in the call.

paramnames - The list of expected argument in the function definition.

ArgParser

public ArgParser(java.lang.String funcname,
                 PyObject[] args,
                 java.lang.String[] kws,
                 java.lang.String[] paramnames,
                 int minargs)

ArgParser

public ArgParser(java.lang.String funcname,
                 PyObject[] args,
                 java.lang.String[] kws,
                 java.lang.String[] paramnames,
                 int minargs,
                 boolean takesZeroArgs)

Method Detail

getString

public java.lang.String getString(int pos)

Return a required argument as a String.

Parameters:

pos - The position of the .. First argument is numbered 0.

getString

public java.lang.String getString(int pos,
                                  java.lang.String def)

Return an optional argument as a String.

Parameters:

pos - The position of the argument. First argument is numbered 0.

getInt

public int getInt(int pos)

Return a required argument as an int.

Parameters:

pos - The position of the argument. First argument is numbered 0.

getInt

public int getInt(int pos,
                  int def)

Return an optional argument as an int.

Parameters:

pos - The position of the argument. First argument is numbered 0.

getIndex

public int getIndex(int pos)

Return an required argument as an index.

Parameters:

pos - The position of the argument. First argument is numbered 0.

getIndex

public int getIndex(int pos,
                    int def)

Return an optional argument as an index.

Parameters:

pos - The position of the argument. First argument is numbered 0.

getPyObject

public PyObject getPyObject(int pos)

Return a required argument as a PyObject.

Parameters:

pos - The position of the argument. First argument is numbered 0.

getPyObject

public PyObject getPyObject(int pos,
                            PyObject def)

Return an optional argument as a PyObject.

Parameters:

pos - The position of the argument. First argument is numbered 0.

getPyObjectByType

public PyObject getPyObjectByType(int pos,
                                  PyType type)

Return a required argument as a PyObject, ensuring the object is of the specified type.

Parameters:

pos - the position of the argument. First argument is numbered 0

type - the desired PyType of the argument

Returns:

the PyObject of PyType type

getPyObjectByType

public PyObject getPyObjectByType(int pos,
                                  PyType type,
                                  PyObject def)

Return an optional argument as a PyObject, or return the default value provided, which may be null. If the returned value is not null, it must be of the specified type.

Parameters:

pos - the position of the argument. First argument is numbered 0

type - the desired PyType of the argument

def - to return if the argument at pos was not given (null allowed)

Returns:

the PyObject of PyType type

getList

public PyObject getList(int pos)

Return the remaining arguments as a tuple.

Parameters:

pos - The position of the argument. First argument is numbered 0.

noKeywords

public void noKeywords()

Ensure no keyword arguments were passed, raising a TypeError if so.