org.formulacompiler.compiler.internal.bytecode.HelperCompiler.java Source code

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Here is the source code for org.formulacompiler.compiler.internal.bytecode.HelperCompiler.java

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/*
 * Copyright (c) 2006-2009 by Abacus Research AG, Switzerland.
 * All rights reserved.
 *
 * This file is part of the Abacus Formula Compiler (AFC).
 *
 * For commercial licensing, please contact sales(at)formulacompiler.com.
 *
 * AFC 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.
 *
 * AFC 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 AFC.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.formulacompiler.compiler.internal.bytecode;

import org.formulacompiler.compiler.internal.expressions.ExpressionNode;
import org.formulacompiler.compiler.internal.expressions.LetDictionary.LetEntry;
import org.formulacompiler.compiler.internal.model.ExpressionNodeForSubSectionModel;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;

abstract class HelperCompiler extends ValueMethodCompiler {
    private final ExpressionNode node;

    HelperCompiler(SectionCompiler _section, int _access, ExpressionNode _node,
            Iterable<LetEntry<Compilable>> _closure, Type... _params) {
        super(_section, _access, _section.newGetterName(), descriptorOf(_params) + descriptorOf(_section, _closure),
                _node.getDataType());
        this.node = _node;
        addClosureToLetDict(_closure, sizeOf(_params));
    }

    HelperCompiler(SectionCompiler _section, ExpressionNode _node, Iterable<LetEntry<Compilable>> _closure) {
        this(_section, Opcodes.ACC_FINAL, _node, _closure);
    }

    private static String descriptorOf(Type[] _params) {
        final StringBuilder b = new StringBuilder();
        for (Type param : _params) {
            b.append(param.getDescriptor());
        }
        return b.toString();
    }

    private int sizeOf(Type[] _params) {
        int size = 0;
        for (Type param : _params) {
            size += param.getSize();
        }
        return size;
    }

    protected final ExpressionNode node() {
        return this.node;
    }

    protected static final ExpressionNode firstLocalElementIn(Iterable<ExpressionNode> _elts) {
        for (ExpressionNode elt : _elts) {
            if (!(elt instanceof ExpressionNodeForSubSectionModel)) {
                return elt;
            }
        }
        return null;
    }

}