org.nuiton.wikitty.query.conditions.TerminalNaryOperator Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of wikitty-api Show documentation
Public wikitty API
The newest version!
/*
 * #%L
 * Wikitty :: api
 * %%
 * Copyright (C) 2012 CodeLutin, Benjamin Poussin
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as 
 * published by the Free Software Foundation, either version 3 of the 
 * License, or (at your option) any later version.
 * 
 * This program 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 Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public 
 * License along with this program.  If not, see
 * .
 * #L%
 */
package org.nuiton.wikitty.query.conditions;

import org.nuiton.wikitty.entities.Element;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.apache.commons.lang3.ClassUtils;
import org.apache.commons.lang3.ObjectUtils;
import org.nuiton.wikitty.WikittyException;
import org.nuiton.wikitty.query.WikittyQueryVisitor;

/**
 *
 * @author poussin
 * @version $Revision$
 *
 * Last update: $Date$
 * by : $Author$
 */
public class TerminalNaryOperator extends TerminalOperator {

    // serialVersionUID is used for serialization.
    private static final long serialVersionUID = 1L;

    protected Element element;
    protected List values;

    /**
     * Constructor with all parameters initialized
     *
     * @param element
     */
    public TerminalNaryOperator(Element element) {
        this(element, (Collection)null);
    }

    /**
     * Constructor with all parameters initialized
     *
     * @param element
     * @param values value is internaly copied to prevent external modification
     */
    public TerminalNaryOperator(Element element, Collection values) {
        this.element = element;
        if (values != null) {
            this.values = new ArrayList(values);
        }
    }

    @Override
    public boolean waitCondition() {
        return true;
    }

    @Override
    public Condition addCondition(Condition c) {
        if (c instanceof ConditionValue) {
            getValues().add((ConditionValue)c);
        } else {
            throw new WikittyException(String.format(
                    "Only ConditionValue can be add to %s, but you try to add: %s",
                    this.getClass().getSimpleName(),
                    ClassUtils.getShortCanonicalName(c, "null")));
        }
        return this;
    }

    @Override
    public void accept(WikittyQueryVisitor visitor) {
        boolean walk = visitor.visitEnter(this);
        if (walk && values != null) {
            boolean notFirst = false;
            for (Condition r : values) {
                if (notFirst) {
                    walk = visitor.visitMiddle(this);
                    if (!walk) {
                        // le visiteur demande l'arret de la visite
                        break;
                    }
                } else {
                    notFirst = true;
                }
                r.accept(visitor);
            }
        }
        visitor.visitLeave(this, walk);
    }

    public Element getElement() {
        return element;
    }

    public List getValues() {
        if (values == null) {
            values = new ArrayList();
        }
        return values;
    }

    @Override
    boolean equalsDeep(Object other) {
        TerminalNaryOperator op = (TerminalNaryOperator)other;
        boolean result = ObjectUtils.equals(this.getElement(), op.getElement())
                && ObjectUtils.equals(this.getValues(), op.getValues());
        return result;
    }
}