android: AndrOBD library vendored (no submodule, no git link)
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“Naeel”
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/*
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* (C) Copyright 2015 by fr3ts0n <erwin.scheuch-heilig@gmx.at>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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package com.fr3ts0n.pvs.io;
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import com.fr3ts0n.pvs.ProcessVar;
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import com.fr3ts0n.pvs.PvChangeEvent;
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import com.fr3ts0n.pvs.PvChangeListener;
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import org.xml.sax.helpers.AttributesImpl;
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import java.io.OutputStream;
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import java.util.Iterator;
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import javax.xml.transform.OutputKeys;
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import javax.xml.transform.Result;
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import javax.xml.transform.Transformer;
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import javax.xml.transform.sax.SAXTransformerFactory;
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import javax.xml.transform.sax.TransformerHandler;
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import javax.xml.transform.stream.StreamResult;
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/**
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* XML writer to write Process Variables into an XML-Stream
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*
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* @author $Author: erwin $
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*/
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public class PvXMLWriter
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implements PvChangeListener
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{
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private Result xFormResult;
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private SAXTransformerFactory factory;
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private TransformerHandler handler;
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private Transformer serializer;
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private boolean documentStarted = false;
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/** XML Tag-Names */
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public static final String TAG_PVLIST = "PV-LIST";
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public static final String TAG_PROCESSVAR = "PV";
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public static final String TAG_PVATTRIBUTE = "AT";
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/** XML attribute values */
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public static final String ATTR_TYPE = "type";
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public static final String ATTR_KEY = "key";
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public static final String ATTR_NAME = "name";
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/**
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* Creates a new instance of PvXMLWriter
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*/
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private PvXMLWriter()
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{
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try
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{
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factory = (SAXTransformerFactory) SAXTransformerFactory.newInstance();
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handler = factory.newTransformerHandler();
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serializer = handler.getTransformer();
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serializer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
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serializer.setOutputProperty(OutputKeys.INDENT, "yes");
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serializer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
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} catch (Exception e)
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{
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e.printStackTrace();
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}
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}
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/**
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* Creates a new instance of PvXMLWriter
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*/
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public PvXMLWriter(OutputStream oStream)
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{
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this();
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setOutputStream(oStream);
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}
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/**
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* set a stream writer for the handler
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*/
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private void setOutputStream(OutputStream oStream)
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{
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try
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{
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xFormResult = new StreamResult(oStream);
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handler.setResult(xFormResult);
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} catch (Exception e)
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{
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e.printStackTrace();
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}
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}
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/**
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* initialize document writing
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*/
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private void startDocument()
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{
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AttributesImpl attrs = new AttributesImpl();
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try
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{
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handler.startDocument();
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handler.startElement("", TAG_PVLIST, TAG_PVLIST, attrs);
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documentStarted = true;
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} catch (Throwable e)
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{
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e.printStackTrace();
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}
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}
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/**
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* finalize Document writing
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*/
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private void endDocument()
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{
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try
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{
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handler.endElement("", TAG_PVLIST, TAG_PVLIST);
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handler.endDocument();
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documentStarted = false;
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} catch (Throwable e)
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{
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e.printStackTrace();
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}
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}
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/**
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* write a process variable as XML to an output stream
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*
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* @param pv processVar to write
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* @param recursiveDepth Depth of recursive PV writing
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* @param completeDoc if TRUE, XML document will be initialized before,
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* and finalized after writing this PV
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*/
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@SuppressWarnings("rawtypes")
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private void writePv(ProcessVar pv, int recursiveDepth, boolean completeDoc)
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{
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Object currKey;
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Object currVal;
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// Initialize XML-Document
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if (completeDoc || !documentStarted)
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{
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startDocument();
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}
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try
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{
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AttributesImpl attrs = new AttributesImpl();
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attrs.addAttribute("", ATTR_TYPE, ATTR_TYPE, "CDATA", pv.getClass().getName());
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attrs.addAttribute("", ATTR_KEY, ATTR_KEY, "CDATA", String.valueOf(pv.getKeyValue()));
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handler.startElement("", TAG_PROCESSVAR, TAG_PROCESSVAR, attrs);
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if (recursiveDepth > 0)// Loop through all PV-Attributes
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{
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Iterator it = pv.keySet().iterator();
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while (it.hasNext())
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{
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currKey = it.next();
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currVal = pv.get(currKey);
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attrs.clear();
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attrs.addAttribute("", ATTR_NAME, ATTR_NAME, "CDADTA", currKey.toString());
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handler.startElement("", TAG_PVATTRIBUTE, TAG_PVATTRIBUTE, attrs);
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if (currVal != null)
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{
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// If current value is a PV itself ...
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if (currVal instanceof ProcessVar)
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{
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// write recursively
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writePv((ProcessVar) currVal, recursiveDepth - 1, false);
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} else
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{
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// Otherwise write PV-Data as attribute
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String currStr = currVal.toString();
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handler.characters(currStr.toCharArray(), 0, currStr.length());
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}
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}
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// finish attribute XML-element
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handler.endElement("", TAG_PVATTRIBUTE, TAG_PVATTRIBUTE);
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}
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}
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// finish PV XNL-element
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handler.endElement("", TAG_PROCESSVAR, TAG_PROCESSVAR);
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} catch (Throwable e)
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{
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e.printStackTrace();
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}
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// Finalize XML document
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if (completeDoc)
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{
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endDocument();
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}
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}
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/**
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* write a process variable as XML to an output stream
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*
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* @param pv processVar to write
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* @param recursiveDepth Depth of recursive PV writing
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*/
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public void writePv(ProcessVar pv, int recursiveDepth)
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{
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writePv(pv, recursiveDepth, false);
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}
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/**
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* Standard writing of PV
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* (uses recursive depth=100, NON complete Doc
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*
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* @param pv processVar to write
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*/
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private void writePv(ProcessVar pv)
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{
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writePv(pv, 100, false);
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}
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/**
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* Implementation of PvChangeListener
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*/
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public void pvChanged(PvChangeEvent event)
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{
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// Test für XML-Ausgabe
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if (event.getValue() instanceof ProcessVar)
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{
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writePv((ProcessVar) event.getValue());
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}
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}
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}
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