001/**
002 * Logback: the reliable, generic, fast and flexible logging framework.
003 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
004 *
005 * This program and the accompanying materials are dual-licensed under
006 * either the terms of the Eclipse Public License v1.0 as published by
007 * the Eclipse Foundation
008 *
009 *   or (per the licensee's choosing)
010 *
011 * under the terms of the GNU Lesser General Public License version 2.1
012 * as published by the Free Software Foundation.
013 */
014package ch.qos.logback.core.joran.action;
015
016import java.util.HashMap;
017import java.util.Map;
018
019import org.xml.sax.Attributes;
020
021import ch.qos.logback.core.CoreConstants;
022import ch.qos.logback.core.joran.JoranConstants;
023import ch.qos.logback.core.joran.spi.SaxEventInterpretationContext;
024import ch.qos.logback.core.util.OptionHelper;
025
026public class ConversionRuleAction extends Action {
027    boolean inError = false;
028
029    /**
030     * Instantiates a layout of the given class and sets its name.
031     *
032     */
033    @SuppressWarnings("unchecked")
034    public void begin(SaxEventInterpretationContext ec, String localName, Attributes attributes) {
035        // Let us forget about previous errors (in this object)
036        inError = false;
037
038        String errorMsg;
039        String conversionWord = attributes.getValue(JoranConstants.CONVERSION_WORD_ATTRIBUTE);
040        String converterClass = attributes.getValue(JoranConstants.CONVERTER_CLASS_ATTRIBUTE);
041
042        if (OptionHelper.isNullOrEmpty(conversionWord)) {
043            inError = true;
044            errorMsg = "No 'conversionWord' attribute in <conversionRule>";
045            addError(errorMsg);
046
047            return;
048        }
049
050        if (OptionHelper.isNullOrEmpty(converterClass)) {
051            inError = true;
052            errorMsg = "No 'converterClass' attribute in <conversionRule>";
053            ec.addError(errorMsg);
054
055            return;
056        }
057
058        try {
059            Map<String, String> ruleRegistry = (Map<String, String>) context
060                    .getObject(CoreConstants.PATTERN_RULE_REGISTRY);
061            if (ruleRegistry == null) {
062                ruleRegistry = new HashMap<String, String>();
063                context.putObject(CoreConstants.PATTERN_RULE_REGISTRY, ruleRegistry);
064            }
065            // put the new rule into the rule registry
066            addInfo("registering conversion word " + conversionWord + " with class [" + converterClass + "]");
067            ruleRegistry.put(conversionWord, converterClass);
068        } catch (Exception oops) {
069            inError = true;
070            errorMsg = "Could not add conversion rule to PatternLayout.";
071            addError(errorMsg);
072        }
073    }
074
075    /**
076     * Once the children elements are also parsed, now is the time to activate the
077     * appender options.
078     */
079    public void end(SaxEventInterpretationContext ec, String n) {
080    }
081
082    public void finish(SaxEventInterpretationContext ec) {
083    }
084}