standard-examples/src/main/java/org/apache/taglibs/standard/examples/taglib/DefaultLocaleTag.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.taglibs.standard.examples.taglib;

import java.util.Locale;

import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.jstl.core.ConditionalTagSupport;

/**
 * <p>Tag handler for &lt;locales&gt;
 *
 * @author Felipe Leme <jstl@felipeal.net>
 */

public class DefaultLocaleTag extends ConditionalTagSupport {

    private static final Locale defaultLocale = Locale.getDefault();

    public boolean condition() throws JspTagException {
        LocalesTag localesTag = (LocalesTag) findAncestorWithClass(this, LocalesTag.class);
        if (localesTag == null) {
            throw new JspTagException("defaultLocale bust be inside locales");
        }
        return localesTag.getCurrent().equals(defaultLocale);
    }
}