/*
 * Copyright 2002,2004 The Apache Software Foundation.
 *
 * 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.apache.commons.jelly.tags.junit;

import org.apache.commons.jelly.TagLibrary;

import org.apache.commons.jelly.JellyException;
import org.apache.commons.jelly.TagLibrary;
import org.apache.commons.jelly.expression.Expression;
import org.apache.commons.jelly.expression.ExpressionFactory;
import org.apache.commons.jelly.impl.TagScript;
import org.apache.commons.jelly.expression.xpath.XPathExpression;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.jaxen.JaxenException;

/** Describes the Taglib. This class could be generated by XDoclet
  *
  * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
  * @version $Revision: 1.5 $
  */
public class JUnitTagLibrary extends TagLibrary {

    /** The Log to which logging calls will be made. */
    private Log log = LogFactory.getLog(JUnitTagLibrary.class);

    public JUnitTagLibrary() {
        registerTag("assert", AssertTag.class);
        registerTag("assertEquals", AssertEqualsTag.class);
        registerTag("assertThrows", AssertThrowsTag.class);
        registerTag("fail", FailTag.class);
        registerTag("run", RunTag.class );
        registerTag("case", CaseTag.class );
        registerTag("suite", SuiteTag.class );
    }

    public Expression createExpression(
        ExpressionFactory factory,
        TagScript tagScript,
        String attributeName,
        String attributeValue) throws JellyException {

        // #### may need to include some namespace URI information in the XPath instance?

        if (attributeName.equals("xpath")) {
            if ( log.isDebugEnabled() ) {
                log.debug( "Parsing XPath expression: " + attributeValue );
            }

            // XPath xpath = new Dom4jXPath(attributeValue);
            Expression xpathExpr = super.createExpression( factory,
                                                               tagScript,
                                                               attributeName,
                                                               attributeValue );

            return new XPathExpression(attributeValue, xpathExpr, tagScript);
        }

        // will use the default expression instead
        return super.createExpression(factory, tagScript, attributeName, attributeValue);
    }
}