chochos
13a04b271a
git-svn-id: https://j8583.svn.sourceforge.net/svnroot/j8583/j8583@73 db60a039-f72e-0410-b1d2-baa000846441
233 lines
8.4 KiB
Java
233 lines
8.4 KiB
Java
/*
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j8583 A Java implementation of the ISO8583 protocol
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Copyright (C) 2007 Enrique Zamudio Lopez
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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package com.solab.iso8583.parse;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.URL;
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import java.util.HashMap;
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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.parsers.ParserConfigurationException;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.w3c.dom.Document;
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import org.w3c.dom.Element;
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import org.w3c.dom.NodeList;
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import org.xml.sax.SAXException;
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import com.solab.iso8583.CustomField;
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import com.solab.iso8583.IsoMessage;
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import com.solab.iso8583.IsoType;
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import com.solab.iso8583.MessageFactory;
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/** This class is used to parse a XML configuration file and configure
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* a MessageFactory with the values from it.
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*
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* @author Enrique Zamudio
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*/
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public class ConfigParser {
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private final static Logger log = LoggerFactory.getLogger(ConfigParser.class);
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/** Creates a message factory configured from the default file, which is j8583.xml
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* located in the root of the classpath. */
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public static MessageFactory createDefault() throws IOException {
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if (MessageFactory.class.getClassLoader().getResource("j8583.xml") == null) {
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log.warn("ISO8583 ConfigParser cannot find j8583.xml, returning empty message factory");
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return new MessageFactory();
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} else {
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return createFromClasspathConfig("j8583.xml");
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}
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}
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/** Creates a message factory from the specified path inside the classpath. */
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public static MessageFactory createFromClasspathConfig(String path) throws IOException {
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InputStream ins = MessageFactory.class.getClassLoader().getResourceAsStream(path);
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MessageFactory mfact = new MessageFactory();
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if (ins != null) {
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log.debug("ISO8583 Parsing config from classpath file {}", path);
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try {
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parse(mfact, ins);
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} finally {
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ins.close();
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}
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} else {
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log.warn("ISO8583 File not found in classpath: {}", path);
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}
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return mfact;
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}
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/** Creates a message factory from the file located at the specified URL. */
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public static MessageFactory createFromUrl(URL url) throws IOException {
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MessageFactory mfact = new MessageFactory();
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InputStream stream = url.openStream();
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try {
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parse(mfact, stream);
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} finally {
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stream.close();
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}
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return mfact;
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}
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/** Reads the XML from the stream and configures the message factory with its values.
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* @param mfact The message factory to be configured with the values read from the XML.
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* @param stream The InputStream containing the XML configuration. */
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protected static void parse(MessageFactory mfact, InputStream stream) throws IOException {
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final DocumentBuilderFactory docfact = DocumentBuilderFactory.newInstance();
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DocumentBuilder docb = null;
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Document doc = null;
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try {
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docb = docfact.newDocumentBuilder();
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doc = docb.parse(stream);
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} catch (ParserConfigurationException ex) {
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log.error("ISO8583 Cannot parse XML configuration", ex);
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return;
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} catch (SAXException ex) {
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log.error("ISO8583 Parsing XML configuration", ex);
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return;
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}
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final Element root = doc.getDocumentElement();
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//Read the ISO headers
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NodeList nodes = root.getElementsByTagName("header");
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Element elem = null;
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for (int i = 0; i < nodes.getLength(); i++) {
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elem = (Element)nodes.item(i);
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int type = parseType(elem.getAttribute("type"));
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if (type == -1) {
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throw new IOException("Invalid type for ISO8583 header: " + elem.getAttribute("type"));
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}
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if (elem.getChildNodes() == null || elem.getChildNodes().getLength() == 0) {
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throw new IOException("Invalid ISO8583 header element");
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}
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String header = elem.getChildNodes().item(0).getNodeValue();
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if (log.isTraceEnabled()) {
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log.trace("Adding ISO8583 header for type {}: {}", elem.getAttribute("type"), header);
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}
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mfact.setIsoHeader(type, header);
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}
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//Read the message templates
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nodes = root.getElementsByTagName("template");
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for (int i = 0; i < nodes.getLength(); i++) {
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elem = (Element)nodes.item(i);
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int type = parseType(elem.getAttribute("type"));
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if (type == -1) {
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throw new IOException("Invalid ISO8583 type for template: " + elem.getAttribute("type"));
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}
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NodeList fields = elem.getElementsByTagName("field");
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IsoMessage m = new IsoMessage();
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m.setType(type);
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m.setCharacterEncoding(mfact.getCharacterEncoding());
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for (int j = 0; j < fields.getLength(); j++) {
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Element f = (Element)fields.item(j);
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int num = Integer.parseInt(f.getAttribute("num"));
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IsoType itype = IsoType.valueOf(f.getAttribute("type"));
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int length = 0;
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if (f.getAttribute("length").length() > 0) {
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length = Integer.parseInt(f.getAttribute("length"));
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}
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String v = f.getChildNodes().item(0).getNodeValue();
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CustomField<?> _cf = mfact.getCustomField(num);
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m.setValue(num, _cf == null ? v : _cf.decodeField(v), _cf, itype, length);
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}
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mfact.addMessageTemplate(m);
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}
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//Read the parsing guides
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nodes = root.getElementsByTagName("parse");
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for (int i = 0; i < nodes.getLength(); i++) {
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elem = (Element)nodes.item(i);
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int type = parseType(elem.getAttribute("type"));
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if (type == -1) {
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throw new IOException("Invalid ISO8583 type for parse guide: " + elem.getAttribute("type"));
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}
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NodeList fields = elem.getElementsByTagName("field");
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HashMap<Integer, FieldParseInfo> parseMap = new HashMap<Integer, FieldParseInfo>();
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for (int j = 0; j < fields.getLength(); j++) {
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Element f = (Element)fields.item(j);
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int num = Integer.parseInt(f.getAttribute("num"));
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IsoType itype = IsoType.valueOf(f.getAttribute("type"));
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int length = 0;
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if (f.getAttribute("length").length() > 0) {
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length = Integer.parseInt(f.getAttribute("length"));
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}
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parseMap.put(num, FieldParseInfo.getInstance(itype, length, mfact.getCharacterEncoding()));
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}
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mfact.setParseMap(type, parseMap);
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}
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}
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/** Configures a MessageFactory using the default configuration file j8583.xml. This is useful
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* if you have a MessageFactory created using Spring for example. */
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public static void configureFromDefault(MessageFactory mfact) throws IOException {
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if (MessageFactory.class.getClassLoader().getResource("j8583.xml") == null) {
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log.warn("ISO8583 config file j8583.xml not found!");
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} else {
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configureFromClasspathConfig(mfact, "j8583.xml");
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}
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}
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/** This method attempts to open a stream from the XML configuration in the specified URL and
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* configure the message factory from that config. */
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public static void configureFromUrl(MessageFactory mfact, URL url) throws IOException {
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InputStream stream = url.openStream();
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try {
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parse(mfact, stream);
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} finally {
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stream.close();
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}
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}
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/** Configures a MessageFactory using the configuration file at the path specified (will be searched
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* within the classpath using the MessageFactory's ClassLoader). This is useful for configuring
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* Spring-bound instances of MessageFactory for example. */
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public static void configureFromClasspathConfig(MessageFactory mfact, String path) throws IOException {
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InputStream ins = MessageFactory.class.getClassLoader().getResourceAsStream(path);
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if (ins != null) {
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log.debug("ISO8583 Parsing config from classpath file {}", path);
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try {
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parse(mfact, ins);
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} finally {
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ins.close();
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}
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} else {
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log.warn("ISO8583 File not found in classpath: {}", path);
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}
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}
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/** Parses a message type expressed as a hex string and returns the integer number.
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* For example, "0200" or "200" return the number 512 (0x200) */
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private static int parseType(String type) throws IOException {
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if (type.length() % 2 == 1) {
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type = "0" + type;
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}
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if (type.length() != 4) {
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return -1;
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}
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return ((type.charAt(0) - 48) << 12) | ((type.charAt(1) - 48) << 8)
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| ((type.charAt(2) - 48) << 4) | (type.charAt(3) - 48);
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}
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}
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