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/**
 * Copyright 2018 jianggujin (www.jianggujin.com).
 * 
 * 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 com.jianggujin.http.response;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;

import com.jianggujin.http.core.JHttpException;
import com.jianggujin.http.util.JDataUtils;
import com.jianggujin.http.util.JXMLUtils;

/**
 * XML响应,SAX方式解析
 * 
 * @author jianggujin
 *
 */
public class JXMLSaxResponse extends JAbstractResponse {

    private String charset;
    private JSaxDefaultHandler handler;

    public JXMLSaxResponse(JSaxDefaultHandler handler) {
        this.handler = handler;
    }

    public JXMLSaxResponse(String charset, JSaxDefaultHandler handler) {
        this(handler);
        this.charset = charset;
    }

    @Override
    protected void dealData(InputStream stream) throws IOException, JHttpException {
        String charset = (this.charset == null || this.charset.length() == 0)
                ? JDataUtils.getCharsetFromContentType(this.getHeader("Content-Type"))
                : this.charset;
        try {
            InputStreamReader reader = new InputStreamReader(stream, charset);
            XMLReader xmlReader = JXMLUtils.newXMLReader();
            xmlReader.setContentHandler(handler);
            xmlReader.setEntityResolver(handler);
            xmlReader.setErrorHandler(handler);
            xmlReader.setDTDHandler(handler);
            xmlReader.parse(new InputSource(reader));
            this.data = handler.getData();
        } catch (Exception e) {
            throw new JHttpException(e);
        }
    }
}