net.ontopia.topicmaps.query.parser.OrClause.java Source code

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Here is the source code for net.ontopia.topicmaps.query.parser.OrClause.java

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/*
 * #!
 * Ontopia Engine
 * #-
 * Copyright (C) 2001 - 2013 The Ontopia Project
 * #-
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * !#
 */

package net.ontopia.topicmaps.query.parser;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import org.apache.commons.lang3.StringUtils;

/**
 * INTERNAL: Used to represent or clauses in tolog queries.
 */
public class OrClause extends AbstractClause {
    protected List alternatives;
    protected boolean shortcircuit;

    public OrClause() {
        alternatives = new ArrayList();
    }

    public OrClause(List alternatives) {
        this.alternatives = alternatives;
    }

    public boolean getShortCircuit() {
        return shortcircuit;
    }

    public void setShortCircuit(boolean shortcircuit) {
        this.shortcircuit = shortcircuit;
    }

    public void addClauseList(List alternative) {
        alternatives.add(alternative);
    }

    public List getAlternatives() {
        return alternatives;
    }

    @Override
    public Collection getAllVariables() {
        Collection vars = new HashSet();

        for (int ix = 0; ix < alternatives.size(); ix++) {
            List subclauses = (List) alternatives.get(ix);

            for (int i = 0; i < subclauses.size(); i++) {
                AbstractClause clause = (AbstractClause) subclauses.get(i);
                vars.addAll(clause.getAllVariables());
            }
        }

        return vars;
    }

    @Override
    public Collection getAllLiterals() {
        Collection literals = new HashSet();

        for (int ix = 0; ix < alternatives.size(); ix++) {
            List subclauses = (List) alternatives.get(ix);

            for (int i = 0; i < subclauses.size(); i++) {
                AbstractClause clause = (AbstractClause) subclauses.get(i);
                literals.addAll(clause.getAllLiterals());
            }
        }

        return literals;
    }

    @Override
    public List getArguments() {
        List args = new ArrayList();

        for (int ix = 0; ix < alternatives.size(); ix++) {
            List subclauses = (List) alternatives.get(ix);

            for (int i = 0; i < subclauses.size(); i++) {
                AbstractClause clause = (AbstractClause) subclauses.get(i);
                args.addAll(clause.getArguments());
            }
        }

        return args;
    }

    @Override
    public String toString() {
        return "{" + StringUtils.join(alternatives, (shortcircuit ? " || " : " | ")) + "}";
    }

}