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/** @file valueiterator.cc
* @brief Class for iterating over document values.
*/
/* Copyright (C) 2008,2009,2011,2013 Olly Betts
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include "xapian/valueiterator.h"
#include "debuglog.h"
#include "omassert.h"
#include "backends/valuelist.h"
using namespace std;
namespace Xapian {
void
ValueIterator::decref()
{
Assert(internal);
if (--internal->_refs == 0)
delete internal;
}
ValueIterator::ValueIterator(Internal *internal_) : internal(internal_)
{
LOGCALL_CTOR(API, "ValueIterator", internal_);
Assert(internal);
++internal->_refs;
try {
internal->next();
} catch (...) {
// The destructor only runs if the constructor completes, so we have to
// take care of cleaning up for ourselves here.
decref();
throw;
}
if (internal->at_end()) {
decref();
internal = NULL;
}
}
ValueIterator::ValueIterator(const ValueIterator & o)
: internal(o.internal)
{
LOGCALL_CTOR(API, "ValueIterator", o);
if (internal)
++internal->_refs;
}
ValueIterator &
ValueIterator::operator=(const ValueIterator & o)
{
LOGCALL(API, ValueIterator &, "ValueIterator::operator=", o);
if (o.internal)
++o.internal->_refs;
if (internal)
decref();
internal = o.internal;
RETURN(*this);
}
string
ValueIterator::operator*() const
{
LOGCALL(API, string, "ValueIterator::operator*", NO_ARGS);
Assert(internal);
RETURN(internal->get_value());
}
ValueIterator &
ValueIterator::operator++()
{
LOGCALL(API, ValueIterator &, "ValueIterator::operator++", NO_ARGS);
Assert(internal);
internal->next();
if (internal->at_end()) {
decref();
internal = NULL;
}
RETURN(*this);
}
Xapian::docid
ValueIterator::get_docid() const
{
LOGCALL(API, Xapian::docid, "ValueIterator::get_docid", NO_ARGS);
Assert(internal);
RETURN(internal->get_docid());
}
Xapian::valueno
ValueIterator::get_valueno() const
{
LOGCALL(API, Xapian::valueno, "ValueIterator::get_valueno", NO_ARGS);
Assert(internal);
RETURN(internal->get_valueno());
}
void
ValueIterator::skip_to(Xapian::docid docid_or_slot)
{
LOGCALL_VOID(API, "ValueIterator::skip_to", docid_or_slot);
if (internal) {
internal->skip_to(docid_or_slot);
if (internal->at_end()) {
decref();
internal = NULL;
}
}
}
bool
ValueIterator::check(Xapian::docid did)
{
LOGCALL(API, bool, "ValueIterator::check", did);
if (internal) {
if (!internal->check(did)) RETURN(false);
if (internal->at_end()) {
decref();
internal = NULL;
}
}
RETURN(true);
}
std::string
ValueIterator::get_description() const
{
string desc = "ValueIterator(";
if (internal)
desc += internal->get_description();
desc += ')';
return desc;
}
}
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