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/*
 * The MIT License
 *
 * Copyright 2015 [email protected].
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package xyz.cofe.text.ast;


import java.util.logging.Level;
import java.util.logging.Logger;
import xyz.cofe.collection.BasicVisitor;
import xyz.cofe.collection.Iterators;
import xyz.cofe.collection.NodesExtracter;
import xyz.cofe.collection.Visitor;
import xyz.cofe.collection.tree.AbstractTreeNode;

/**
 *
 * @author [email protected]
 */
public abstract class AstNode
extends AbstractTreeNode
{
    //
    private static void logFine(String message,Object ... args){
        Logger.getLogger(AstNode.class.getName()).log(Level.FINE, message, args);
    }

    private static void logFiner(String message,Object ... args){
        Logger.getLogger(AstNode.class.getName()).log(Level.FINER, message, args);
    }

    private static void logFinest(String message,Object ... args){
        Logger.getLogger(AstNode.class.getName()).log(Level.FINEST, message, args);
    }

    private static void logInfo(String message,Object ... args){
        Logger.getLogger(AstNode.class.getName()).log(Level.INFO, message, args);
    }

    private static void logWarning(String message,Object ... args){
        Logger.getLogger(AstNode.class.getName()).log(Level.WARNING, message, args);
    }

    private static void logSevere(String message,Object ... args){
        Logger.getLogger(AstNode.class.getName()).log(Level.SEVERE, message, args);
    }

    private static void logException(Throwable ex){
        Logger.getLogger(AstNode.class.getName()).log(Level.SEVERE, null, ex);
    }
    //
    
    protected AstNode[] children( AstNode ... nodes ){
        return nodes;
    }
    
    public static final NodesExtracter astNodeExtracter
        = new NodesExtracter() {
        @Override
        public Iterable extract(AstNode from) {
            if( from!=null ){
                return 
                        Iterators.notNullFilter(
                            Iterators.array(from.getChildren())
                        );
            }
            return null;
        }
    };
    
    public static void visit( AstNode tree, Visitor visitor){
        if( visitor==null )throw new IllegalArgumentException( "visitor==null" );
        if( tree==null )throw new IllegalArgumentException( "tree==null" );
        BasicVisitor.visit(visitor, tree, astNodeExtracter);
    }
}