/*
 * 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 jsp2.examples.simpletag;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.DynamicAttributes;
import javax.servlet.jsp.tagext.SimpleTagSupport;

/**
 * SimpleTag handler that echoes all its attributes
 */
public class EchoAttributesTag
    extends SimpleTagSupport
    implements DynamicAttributes
{
    private final List<String> keys = new ArrayList<>();
    private final List<Object> values = new ArrayList<>();

    @Override
    public void doTag() throws JspException, IOException {
        JspWriter out = getJspContext().getOut();
        for( int i = 0; i < keys.size(); i++ ) {
            String key = keys.get( i );
            Object value = values.get( i );
            out.println( "<li>" + key + " = " + value + "</li>" );
        }
    }

    @Override
    public void setDynamicAttribute( String uri, String localName,
        Object value )
        throws JspException
    {
        keys.add( localName );
        values.add( value );
    }
}
