SelectSet.icc

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/*
    Copyright (c) 2002-2009 Tampere University.
 
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/**
 * @file SelectSet.icc
 *
 * Inline implementation of SelectSet class.
 *
 * @author Tommi Rantanen 2004 (tommi.rantanen-no.spam-tut.fi)
 * @author Jari Mäntyneva 2005 (jari.mantyneva-no.spam-tut.fi)
 * @note rating: red
 */
 
#include "Application.hh"
 
 
/**
 * Constructor.
 *
 * @param type Type of the field.&%
 */
template <bool (EntryKeyField::*select)(const EntryKeyField&) const,
          bool (EntryKeyField::*unSelect)(const EntryKeyField&) const>
SelectSet<select, unSelect>::SelectSet(const EntryKeyFieldProperty* type):
    Matcher(type) {
}
 
/**
 * Destructor.
 */
template <bool (EntryKeyField::*select)(const EntryKeyField&) const,
          bool (EntryKeyField::*unSelect)(const EntryKeyField&) const>
SelectSet<select, unSelect>::~SelectSet() {
}
 
/**
 * Filters out entries which do not satisfy selection criteria.
 *
 * However, equal values are accepted.
 *
 * @param searchKey Search key.
 * @param components Entries from which to find. Updated to contain
 *                   entries that matched the search request.
 */
template <bool (EntryKeyField::*select)(const EntryKeyField&) const,
          bool (EntryKeyField::*unSelect)(const EntryKeyField&) const>
void
SelectSet<select, unSelect>::quickFilter(
    const CostDBEntryKey& searchKey,
    CostDBTypes::EntryTable& components) {
 
    CostDBTypes::EntryTable filtered;
    EntryKeyField searchField = searchKey.keyFieldOfType(*fieldType());
 
    for (CostDBTypes::EntryTable::iterator i = components.begin();
         i != components.end(); i++) {
 
        EntryKeyField field = (*i)->keyFieldOfType(*fieldType());
    if (field.isEqual(searchField) || (field.*select)(searchField)) {
        filtered.push_back(*i);
    }
    }
    components = filtered;
}
 
 
/**
 * Searches for database entries that satisfies selection criteria.
 *
 * However, equal values are accepted.
 *
 * Filtering does not require a search key since QuickFilter()
 * guarantees that unacceptable entries do not exist.
 *
 * Only the best matches are returned, i.e. if two entries has only
 * the field to which search is applied different, closer one to the
 * search key is chosen.
 *
 * @param components Entries from which to find. Updated to contain
 *                   entries that matched the search request.
 */
template <bool (EntryKeyField::*select)(const EntryKeyField&) const,
          bool (EntryKeyField::*unSelect)(const EntryKeyField&) const>
void
SelectSet<select, unSelect>::filter(
    const CostDBEntryKey&,
    CostDBTypes::EntryTable& components) {
 
    CostDBTypes::EntryTable filtered;
 
    for (CostDBTypes::EntryTable::iterator i1 = components.begin();
         i1 != components.end(); i1++) {
 
        EntryKeyField field1 = (*i1)->keyFieldOfType(*fieldType());
 
    bool addEntry = true;
 
    for (CostDBTypes::EntryTable::iterator i2 = filtered.begin();
             i2 != filtered.end(); i2++) {
 
        if (!onlyThisFieldDiffers(fieldType(), *(*i1), *(*i2))) {
        continue;
        }
 
            EntryKeyField field2 = (*i2)->keyFieldOfType(*fieldType());
 
        if ((field1.*unSelect)(field2)) {
                filtered.erase(i2);
                i2--;
        } else if ((field1.*select)(field2)) {
                addEntry = false;
            } else if (field1.isEqual(field2)) {
                assert(false);
        }
    }
 
        if (addEntry) {
            filtered.push_back(*i1);
        }
        *i1 = 0;
    }
 
    components = filtered;
}