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/**
 * Copyright (c) 2013 Center for eHalsa i samverkan (CeHis).
 * 							
 *
 * This file is part of SKLTP.
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
package se.skl.tp.hsa.cache;

import java.io.PrintWriter;
import java.util.Map;

/**
 * Prints warnings to a {@link PrintWriter}. Set warning level to the number of missing parent nodes
 * you want a warning to be printed for.
 *
 * @author par.wenaker@callistaenterprise
 *
 */
public class HsaRelationBuilderWithLog extends HsaRelationBuilder {

	private final int warningLevel;
	private final PrintWriter w;
	
	/**
	 * Constructor
	 * 
	 * @param  pw {@link PrintWriter}
	 * @param warningLevel warning level used to print 
	 */
	public HsaRelationBuilderWithLog(PrintWriter pw, int warningLevel) {
		super();
		this.w = pw;
		this.warningLevel = warningLevel;
	}

	/*
	 * (non-Javadoc)
	 * @see se.skl.tp.hsa.cache.HsaRelationBuilder#findParentDn(java.util.Map, se.skl.tp.hsa.cache.Dn)
	 */
	protected Dn findParentDn(final Map nodes, Dn dn) {
		Dn parentDn = dn.parentDn();
		int levels = 1;
		while(parentDn != null && nodes.get(parentDn) == null) {
			levels++;
			parentDn = parentDn.parentDn();
		}
		if(warningLevel > 1 && levels > warningLevel && parentDn != null) {
			logWarning("Parent on " + levels + " levels for [" + dn + "], parent is [" + parentDn + "]");
		}
		return parentDn;
	}
	
	/*
	 * (non-Javadoc)
	 * @see se.skl.tp.hsa.cache.HsaRelationBuilder#logWarning(java.lang.String)
	 */
	@Override
	protected void logWarning(String msg) {
		w.println("WARNING: " + msg);
	}
}