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/*
 * 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.log4j.or.sax;

import org.apache.log4j.or.ObjectRenderer;

import org.xml.sax.Attributes;

/**
 * Render org.xml.sax.Attributes objects.
 *
 * @author Ceki Gülcü
 * @since 1.2
 */
public class AttributesRenderer implements ObjectRenderer {

    public AttributesRenderer() {
    }

    /**
     * Render a {@link org.xml.sax.Attributes}.
     */
    public String doRender(Object o) {
        if (o instanceof Attributes) {
            StringBuilder sbuf = new StringBuilder();
            Attributes a = (Attributes) o;
            int len = a.getLength();
            boolean first = true;
            for (int i = 0; i < len; i++) {
                if (first) {
                    first = false;
                } else {
                    sbuf.append(", ");
                }
                sbuf.append(a.getQName(i));
                sbuf.append('=');
                sbuf.append(a.getValue(i));
            }
            return sbuf.toString();
        } else {
            try {
                return o.toString();
            } catch (Exception ex) {
                return ex.toString();
            }
        }
    }
}