ws.michalski.sepa.pain.SEPAAutoReader.java Source code

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Here is the source code for ws.michalski.sepa.pain.SEPAAutoReader.java

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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 ws.michalski.sepa.pain;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;

import ws.michalski.sepa.pain.SEPAFactory.PainType;
import ws.michalski.sepa.pain.exeptions.SEPAException;
import ws.michalski.sepa.pain.exeptions.SEPASchemaException;
import ws.michalski.sepa.pain.interfaces.SEPAReader;

public class SEPAAutoReader {

    private Log log;
    private Object root;
    private PainType painType;

    public SEPAAutoReader() {
        super();
        log = LogFactory.getLog(SEPAAutoReader.class);
    }

    public SEPAMessage parse(ByteArrayInputStream bai) throws SEPAException, SEPASchemaException {

        SEPAMessage sepaMessage = null;

        String pain = getXmlnsAttribut(bai);
        if (log.isDebugEnabled()) {
            log.debug(pain);
        }

        painType = SEPAFactory.getPainFromSting(pain);
        SEPAReader sr = SEPAFactory.getSEPAReader(painType);

        sepaMessage = sr.parse(bai);
        root = sr.getRootObject();

        return sepaMessage;
    }

    public SEPAMessage parse(InputStream is) throws SEPAException, SEPASchemaException {

        // InputStream in InputByteArray einlesen
        ByteArrayInputStream bai = null;

        bai = getByteArrayInputStream(is, bai);
        return parse(bai);
    }

    public SEPAMessage parse(byte[] data) throws SEPAException, SEPASchemaException {

        ByteArrayInputStream bai = null;

        bai = new ByteArrayInputStream(data);
        return parse(bai);
    }

    /**
     * Liefert ByteArrayInputStream zurck
     * ByteArrayInpuStream kann man mehrfach lesen, was fr Ermittlung von SEPA PAIN-Type 
     * notwendig ist. 
     * 
     * @param is
     * @param bai
     * @return
     */
    private ByteArrayInputStream getByteArrayInputStream(InputStream is, ByteArrayInputStream bai) {
        ByteArrayOutputStream bao = new ByteArrayOutputStream();

        int bread = 0;
        byte[] buff = new byte[1024];

        try {

            while ((bread = is.read(buff)) != -1) {
                bao.write(buff, 0, bread);
            }

            bai = new ByteArrayInputStream(bao.toByteArray());

        } catch (IOException e) {
            log.error(e);
        }
        return bai;
    }

    /**
     * Liefert xmlns Attribut von des XML 
     * @param String zum Suchen als XPath Ausdruck
     * @param Attribut
     * @return String
     */
    private String getXmlnsAttribut(ByteArrayInputStream is) {

        String erg = null;

        is.reset();

        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db;
        Document doc = null;
        try {
            db = dbf.newDocumentBuilder();
            doc = db.parse(is);
        } catch (ParserConfigurationException e) {
            log.error(e);
        } catch (SAXException e) {
            log.error(e);
        } catch (IOException e) {
            log.error(e);
        }

        Element rootNode = doc.getDocumentElement();

        erg = rootNode.getAttribute("xmlns");

        is.reset();

        return erg;
    }

    /**
     * Liefert root als Object zurck
     * @return
     */
    public Object getRoot() {
        return root;
    }

    public PainType getPainType() {
        return painType;
    }

}