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#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
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#   distributed under the License is distributed on an "AS IS" BASIS,
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#   See NOTICE file for details.
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# *****************************************************************************
import _jpype
from . import _jcustomizer

__all__ = ['JString']


class JString(_jpype._JObject, internal=True):
    """ Base class for ``java.lang.String`` objects

    When called as a function, this class will produce a ``java.lang.String``
    object.  It can be used to test if an object is a Java string
    using ``isinstance(obj, JString)``.

    """
    def __new__(cls, *args, **kwargs):
        if cls != JString:
            raise TypeError("JString factory cannot be used as base class")
        cls = _jpype.JClass("java.lang.String")
        return cls(*args)


@_jcustomizer.JImplementationFor("java.lang.String")
class _JStringProto(object):
    def __add__(self, other):
        return self.concat(other)

    def __len__(self):
        return self.length()

    def __getitem__(self, i):
        if i < 0:
            i += len(self)
            if i < 0:
                raise IndexError("Array index is negative")
        if i >= len(self):
            raise IndexError("Array index exceeds length")
        return self.charAt(i)

    def __contains__(self, other):
        return self.contains(other)

    def __hash__(self):
        if self == None:  # lgtm [py/test-equals-none]
            return hash(None)
        return self.__str__().__hash__()

    def __repr__(self):
        return "'%s'" % self.__str__()


_jpype.JString = JString
