/*
* Redberry: symbolic tensor computations.
*
* Copyright (c) 2010-2013:
* 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.parser;
import cc.redberry.core.tensor.Tensor;
import cc.redberry.core.transformations.Transformation;
import java.util.ArrayList;
import java.util.List;
/**
* @author Dmitry Bolotin
* @author Stanislav Poslavsky
* @since 1.0
*/
public final class ParseManager {
/**
* Default AST transformers to be applied before {@link cc.redberry.core.parser.ParseToken#toTensor()} conversion.
*/
public List<ParseTokenTransformer> defaultParserPreprocessors = new ArrayList<>();
/**
* Default transformations to be applied after {@link cc.redberry.core.parser.ParseToken#toTensor()} conversion.
*/
public List<Transformation> defaultTensorPreprocessors = new ArrayList<>();
private final Parser parser;
/**
* @param parser parser
*/
public ParseManager(Parser parser) {
this.parser = parser;
}
/**
* @param expression string expression
* @param tensorPreprocessors transformation
* @param nodesPreprocessors AST transformers
* @return tensor
*/
public Tensor parse(String expression, Transformation[] tensorPreprocessors, ParseTokenTransformer[] nodesPreprocessors) {
ParseToken node = parser.parse(expression);
for (ParseTokenTransformer tr : nodesPreprocessors)
node = tr.transform(node);
Tensor t = node.toTensor();
for (Transformation tr : tensorPreprocessors)
t = tr.transform(t);
return t;
}
/**
* @param expression string expression
* @param nodesPreprocessors AST transformers
* @return tensor
*/
public Tensor parse(String expression, ParseTokenTransformer... nodesPreprocessors) {
return parse(expression, new Transformation[0], nodesPreprocessors);
}
/**
* @param expression string expression
* @return tensor
*/
public Tensor parse(String expression) {
return parse(expression,
defaultTensorPreprocessors.toArray(new Transformation[defaultTensorPreprocessors.size()]),
defaultParserPreprocessors.toArray(new ParseTokenTransformer[defaultParserPreprocessors.size()]));
}
public Parser getParser() {
return parser;
}
}