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

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Here is the source code for net.ontopia.topicmaps.query.parser.NotClause.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 not clauses in tolog queries.
 */
public class NotClause extends AbstractClause {
    protected List clauses;

    public NotClause() {
        clauses = new ArrayList();
    }

    public NotClause(List clauses) {
        this.clauses = clauses;
    }

    public void setClauseList(List clauses) {
        this.clauses = clauses;
    }

    public List getClauses() {
        return clauses;
    }

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

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

        return vars;
    }

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

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

        return literals;
    }

    @Override
    public List getArguments() {
        Collection items = new HashSet();

        for (int ix = 0; ix < clauses.size(); ix++) {
            AbstractClause clause = (AbstractClause) clauses.get(ix);
            items.addAll(clause.getArguments());
        }

        List list = new ArrayList();
        list.addAll(items);
        return list;
    }

    @Override
    public String toString() {
        return "not(" + StringUtils.join(clauses, ", ") + ")";
    }

}