/*
* Redberry: symbolic tensor computations.
*
* Copyright (c) 2010-2014:
* Stanislav Poslavsky <stvlpos@mail.ru>
* Bolotin Dmitriy <bolotin.dmitriy@gmail.com>
*
* This file is part of Redberry.
*
* Redberry 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 3 of the License, or
* (at your option) any later version.
*
* Redberry 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 Redberry. If not, see <http://www.gnu.org/licenses/>.
*/
package cc.redberry.core.context.defaults;
import cc.redberry.core.context.IndexConverterException;
import cc.redberry.core.context.IndexSymbolConverter;
import cc.redberry.core.context.OutputFormat;
import cc.redberry.core.utils.ArraysUtils;
import java.util.Arrays;
/**
* @author Dmitry Bolotin
* @author Stanislav Poslavsky
* @since 1.0
*/
abstract class SymbolArrayConverter implements IndexSymbolConverter {
private final String[] sortedSymbols;
private final int[] coSortedCodes;
private final String[] symbols;
private final String[] utf;
public SymbolArrayConverter(String[] symbols, String[] utf) {
this.symbols = symbols;
this.utf = utf;
if (symbols.length != utf.length)
throw new RuntimeException();
this.sortedSymbols = symbols.clone();
this.coSortedCodes = new int[symbols.length];
for (int i = 0; i < coSortedCodes.length; ++i)
coSortedCodes[i] = i;
ArraysUtils.quickSort(this.sortedSymbols, this.coSortedCodes);
}
@Override
public boolean applicableToSymbol(String symbol) {
return Arrays.binarySearch(sortedSymbols, symbol) >= 0;
}
@Override
public int getCode(String symbol) throws IndexConverterException {
int codePosition = Arrays.binarySearch(sortedSymbols, symbol);
if (codePosition < 0)
throw new IndexConverterException();
return coSortedCodes[codePosition];
}
@Override
public int maxNumberOfSymbols() {
return sortedSymbols.length - 1;
}
}