Class: Groonga::PrefixOperator — rroonga - ラングバ

Class: Groonga::PrefixOperator

Inherits:
Operator
  • Object
show all
Defined in:
ext/groonga/rb-grn-prefix-operator.c

Constant Summary

Constants inherited from Operator

Operator::ADJUST, Operator::AND, Operator::AND_ASSIGN, Operator::AND_NOT, Operator::ASSIGN, Operator::BITWISE_AND, Operator::BITWISE_NOT, Operator::BITWISE_OR, Operator::BITWISE_XOR, Operator::BUT, Operator::CALL, Operator::CJUMP, Operator::COMMA, Operator::DECREMENT, Operator::DECREMENT_POST, Operator::DELETE, Operator::EQUAL, Operator::EXACT, Operator::EXPRESSION_GET_VARIABLE, Operator::FUZZY, Operator::GEO_DISTANCE1, Operator::GEO_DISTANCE2, Operator::GEO_DISTANCE3, Operator::GEO_DISTANCE4, Operator::GEO_WITHINP5, Operator::GEO_WITHINP6, Operator::GEO_WITHINP8, Operator::GET_REFERENCE, Operator::GET_VALUE, Operator::GREATER, Operator::GREATER_EQUAL, Operator::IN, Operator::INCREMENT, Operator::INCREMENT_POST, Operator::INTERN, Operator::JSON_PUT, Operator::JUMP, Operator::LESS, Operator::LESS_EQUAL, Operator::LONGEST_COMMON_PREFIX, Operator::MATCH, Operator::MINUS, Operator::MINUS_ASSIGN, Operator::MODULO, Operator::MODULO_ASSIGN, Operator::NEAR, Operator::NEAR2, Operator::NOT, Operator::NOT_EQUAL, Operator::NO_OPERATION, Operator::OBJECT_SEARCH, Operator::OR, Operator::OR_ASSIGN, Operator::PARTIAL, Operator::PLUS, Operator::PLUS_ASSIGN, Operator::POP, Operator::PREFIX, Operator::PUSH, Operator::REGEXP, Operator::SHIFTL, Operator::SHIFTL_ASSIGN, Operator::SHIFTR, Operator::SHIFTRR, Operator::SHIFTRR_ASSIGN, Operator::SHIRTR_ASSIGN, Operator::SIMILAR, Operator::SLASH, Operator::SLASH_ASSIGN, Operator::STAR, Operator::STAR_ASSIGN, Operator::SUFFIX, Operator::TABLE_CREATE, Operator::TABLE_GROUP, Operator::TABLE_SELECT, Operator::TABLE_SORT, Operator::TERM_EXTRACT, Operator::UNSPLIT, Operator::XOR_ASSIGN

Instance Method Summary collapse

Methods inherited from Operator

#initialize, #to_i, #to_s

Constructor Details

This class inherits a constructor from Groonga::Operator

Instance Method Details

#exec(text, prefix, options = {}) ⇒ Boolean

Executes a prefix-search operation. Prefix-serach operation checks whether text starts with prefix or not.

Examples:

Executes prefix-search operations with the default context

Groonga::Operator::PREFIX.exec("Hello Rroonga", "Hello")   # => true
Groonga::Operator::PREFIX.exec("Hello Rroonga", "Rroonga") # => false

Executes prefix-search operations with the specified context

context = Groonga::Context.new
Groonga::Operator::PREFIX.exec("Hello Rroonga", "Hello",
                               :context => context) # => true
Groonga::Operator::PREFIX.exec("Hello Rroonga", "Rroonga",
                               :context => context) # => false

Returns true if text starts with prefix, false otherwise.

Parameters:

  • text (String) —

    The text to be searched.

  • prefix (String) —

    The prefix to be contained.

  • options (::Hash) (defaults to: {}) —

    The options.

Options Hash (options):

  • (Groonga::Context.default) (Groonga::Context) —

    The context to executes the operation.

Returns:

  • (Boolean) —

    true if text starts with prefix, false otherwise.



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# File 'ext/groonga/rb-grn-prefix-operator.c', line 47

static VALUE
rb_grn_prefix_operator_exec (int argc, VALUE *argv, VALUE self)
{
    grn_bool have_prefix;
    VALUE rb_text;
    VALUE rb_prefix;
    VALUE rb_options;
    VALUE rb_context;
    grn_ctx *context;
    grn_obj text;
    grn_obj prefix;

    rb_scan_args(argc, argv, "21", &rb_text, &rb_prefix, &rb_options);

    rb_grn_scan_options(rb_options,
                        "context", &rb_context,
                        NULL);
    context = rb_grn_context_ensure(&rb_context);

    GRN_VOID_INIT(&text);
    GRN_VOID_INIT(&prefix);
    RVAL2GRNBULK(rb_text, context, &text);
    RVAL2GRNBULK(rb_prefix, context, &prefix);
    have_prefix = grn_operator_exec_prefix(context, &text, &prefix);
    GRN_OBJ_FIN(context, &text);
    GRN_OBJ_FIN(context, &prefix);

    return CBOOL2RVAL(have_prefix);
}