/**
 * Copyright 2015 Eediom Inc.
 * 
 * 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 org.araqne.logdb.query.command;

import org.araqne.logdb.QueryCommand;
import org.araqne.logdb.Row;
import org.araqne.logdb.RowBatch;
import org.araqne.logdb.ThreadSafe;
import org.araqne.logdb.impl.XmlParser;
import org.slf4j.LoggerFactory;

/**
 * @author xeraph
 */
public class ParseXml extends QueryCommand implements ThreadSafe {
	private final org.slf4j.Logger slog = LoggerFactory.getLogger(ParseXml.class);

	private final String field;
	private final boolean overlay;

	public ParseXml(String field, boolean overlay) {
		this.field = field;
		this.overlay = overlay;
	}

	@Override
	public String getName() {
		return "parsexml";
	}

	@Override
	public void onPush(Row row) {
		pushPipe(parse(row));
	}

	@Override
	public void onPush(RowBatch rowBatch) {
		if (rowBatch.selectedInUse) {
			for (int i = 0; i < rowBatch.size; i++) {
				int p = rowBatch.selected[i];
				Row row = rowBatch.rows[p];
				rowBatch.rows[p] = parse(row);
			}
		} else {
			for (int i = 0; i < rowBatch.size; i++) {
				Row row = rowBatch.rows[i];
				rowBatch.rows[i] = parse(row);
			}
		}

		pushPipe(rowBatch);
	}

	private Row parse(Row row) {
		Object target = row.get(field);
		if (target == null)
			return row;

		String xml = target.toString();

		try {
			if (overlay)
				row.map().putAll(XmlParser.parseXml(xml));
			else
				row = new Row(XmlParser.parseXml(xml));
		} catch (Throwable t) {
			if (slog.isDebugEnabled())
				slog.debug("araqne logdb: parsexml failure - " + xml, t);
		}

		return row;
	}

	@Override
	public String toString() {
		String fieldOpt = "";
		if (field != null && !field.equals("line"))
			fieldOpt = " field=" + field;

		String overlayOpt = "";
		if (overlay)
			overlayOpt = " overlay=t";

		return "parsexml" + fieldOpt + overlayOpt;
	}
}