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jadex.xml.reader.AReader Maven / Gradle / Ivy
package jadex.xml.reader;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.Reader;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.xml.XMLConstants;
import jadex.commons.SUtil;
import jadex.commons.Tuple;
import jadex.commons.transformation.IStringObjectConverter;
import jadex.xml.AttributeInfo;
import jadex.xml.IPostProcessor;
import jadex.xml.SXML;
import jadex.xml.StackElement;
import jadex.xml.SubobjectInfo;
import jadex.xml.TypeInfo;
import jadex.xml.TypeInfoPathManager;
import jadex.xml.stax.QName;
import jadex.xml.stax.XMLReporter;
import jadex.xml.stax.XmlUtil;
/**
* XML Reader abstract class.
*/
public abstract class AReader
{
//-------- constants --------
/** The debug flag. */
public static final boolean DEBUG = false;
/** The string marker object. */
public static final Object STRING_MARKER = new Object();
/** This thread local variable provides access to the read context,
* e.g. from the XML reporter, if required. */
public static final ThreadLocal READ_CONTEXT = new ThreadLocal();
/** The null object. */
public static final Object NULL = new Object();
/** The link mode. */
protected boolean bulklink;
protected XMLReporter reporter;
public AReader(boolean bulklink, XMLReporter reporter) {
this.bulklink = bulklink;
this.reporter = reporter;
}
/**
* Read properties from xml.
* @param input The input stream.
* @param classloader The classloader.
* @param context The context.
*/
// public abstract Object read(TypeInfoPathManager tipmanager, IObjectReaderHandler handler, java.io.Reader input, final ClassLoader classloader,
// final Object callcontext) throws Exception;
/**
* Read properties from xml.
* @param input The input stream.
* @param classloader The classloader.
* @param context The context.
*/
// public abstract Object read(TypeInfoPathManager tipmanager, IObjectReaderHandler handler, InputStream input, final ClassLoader classloader,
// final Object callcontext) throws Exception;
/**
* @param val The string value.
* @return The encoded object.
*/
public static Object objectFromXML(AReader reader, String val, ClassLoader classloader, TypeInfoPathManager manager, IObjectReaderHandler handler)
{
return objectFromXML(reader, val, classloader, null, manager, handler);
}
/**
* @param val The string value.
* @return The encoded object.
*/
public static Object objectFromXML(AReader reader, String val, ClassLoader classloader,
Object context, TypeInfoPathManager manager, IObjectReaderHandler handler)
{
// return objectFromByteArray(reader, val.getBytes(), classloader, context);
java.io.Reader rd = null;
try
{
rd = new StringReader(val);
Object ret = reader.read(manager, (IObjectReaderHandler)handler, rd, classloader, context);
return ret;
}
catch(Exception e)
{
// t.printStackTrace();
// System.out.println("problem: "+new String(val));
throw new RuntimeException(e);
}
finally
{
if(rd!=null)
{
try
{
rd.close();
}
catch(Exception e)
{
}
}
}
}
/**
* @param val The string value.
* @return The encoded object.
*/
public static Object objectFromByteArray(AReader reader, byte[] val, ClassLoader classloader, TypeInfoPathManager manager, IObjectReaderHandler handler)
{
return objectFromInputStream(reader, new ByteArrayInputStream(val), classloader, null, manager, handler);
}
/**
* @param val The string value.
* @return The encoded object.
*/
public static Object objectFromByteArray(AReader reader, byte[] val, ClassLoader classloader, Object context, TypeInfoPathManager manager, IObjectReaderHandler handler)
{
return objectFromInputStream(reader, new ByteArrayInputStream(val), classloader, context, manager, handler);
}
/**
* @param val The string value.
* @return The encoded object.
*/
public static Object objectFromInputStream(AReader reader, InputStream val, ClassLoader classloader, TypeInfoPathManager manager, IObjectReaderHandler handler)
{
return objectFromInputStream(reader, val, classloader, null, manager, handler);
}
/**
* @param val The string value.
* @return The encoded object.
*/
public static Object objectFromInputStream(AReader reader, InputStream bis, ClassLoader classloader, Object context, TypeInfoPathManager manager, IObjectReaderHandler handler)
{
try
{
Object ret = reader.read(manager, (IObjectReaderHandler)handler, bis, classloader, context);
return ret;
}
catch(Exception e)
{
// t.printStackTrace();
// System.out.println("problem: "+new String(val));
throw new RuntimeException(e);
}
finally
{
if(bis!=null)
{
try
{
bis.close();
}
catch(Exception e)
{
}
}
}
}
/**
*
* /
public static Object[] getLastStackElementWithObject(List stack, QName localname)
{
StackElement pse = (StackElement)stack.get(stack.size()-2);
List pathname = new ArrayList();
pathname.add(localname);
for(int i=stack.size()-3; i>=0 && pse.getObject()==null; i--)
{
pse = (StackElement)stack.get(i);
pathname.add(0, ((StackElement)stack.get(i+1)).getTag());
}
return new Object[]{pse, pathname};
}*/
/**
* Get a subobject info for reading.
*/
public static SubobjectInfo getSubobjectInfoRead(QName localname, QName[] fullpath, TypeInfo patypeinfo, Map attrs)
{
SubobjectInfo ret = null;
if(patypeinfo!=null)
{
QName tag = localname;
QName[] fpath = fullpath;
// Hack! If localname is classname remove it
if(localname.getNamespaceURI().startsWith(SXML.PROTOCOL_TYPEINFO))
{
tag = fullpath[fullpath.length-2];
fpath = new QName[fullpath.length-1];
System.arraycopy(fullpath, 0, fpath, 0, fpath.length);
}
ret = patypeinfo.getSubobjectInfoRead(tag, fpath, attrs);
}
return ret;
}
/**
* Read properties from xml.
* @param input The input stream.
* @param classloader The classloader.
* @param context The context.
*/
public Object read(TypeInfoPathManager tipmanager, IObjectReaderHandler handler, java.io.Reader input, final ClassLoader classloader, final Object callcontext) throws Exception
{
IXMLReader parser = createXMLReader(input);
return read(tipmanager, handler, parser, classloader, callcontext);
}
/**
* Read properties from xml.
* @param input The input stream.
* @param classloader The classloader.
* @param context The context.
*/
public Object read(TypeInfoPathManager tipmanager, IObjectReaderHandler handler, InputStream input, final ClassLoader classloader, final Object callcontext) throws Exception
{
IXMLReader parser = createXMLReader(input);
return read(tipmanager, handler, parser, classloader, callcontext);
}
/**
* Read properties from xml.
* @param input The input stream.
* @param classloader The classloader.
* @param context The context.
*/
public Object read(TypeInfoPathManager tipmanager, IObjectReaderHandler handler, IXMLReader parser, final ClassLoader classloader, final Object callcontext) throws Exception
{
AReadContext readcontext = createReadContext(tipmanager, handler, parser, reporter, callcontext, classloader);
AReadContext oldcontext = READ_CONTEXT.get();
READ_CONTEXT.set(readcontext);
try
{
while(parser.hasNext())
{
int next = parser.next();
if(next== XmlUtil.COMMENT)
{
handleComment(readcontext);
}
else if(next==XmlUtil.CHARACTERS || next==XmlUtil.CDATA)
{
handleContent(readcontext);
}
else if(next==XmlUtil.START_ELEMENT)
{
handleStartElement(readcontext);
}
else if(next==XmlUtil.END_ELEMENT)
{
handleEndElement(readcontext);
}
}
// Handle post-processors.
for(int i=1; readcontext.getPostProcessors().size()>0; i++)
{
List ps = (List)readcontext.getPostProcessors().remove(Integer.valueOf(i));
if(ps!=null)
{
for(int j=0; j0 ? readcontext.getTopStackElement().getLocation() : parser.getLocation();
readcontext.getReporter().report(e.toString(), "XML error", readcontext, loc);
}
finally
{
READ_CONTEXT.set(oldcontext);
parser.close();
}
return readcontext.getRootObject()==NULL ? null : readcontext.getRootObject();
}
/**
* Handle the comment.
* @param readcontext The context for reading with all necessary information.
*/
protected void handleComment(AReadContext readcontext) throws Exception
{
if(readcontext.getReadIgnore()==0)
readcontext.setComment(readcontext.getParser().getText());
else if(DEBUG)
System.out.println("Ignoring: "+readcontext.getParser().getText());
// System.out.println("Found comment: "+comment);
}
/**
* Handle the content.
* @param readcontext The context for reading with all necessary information.
*/
protected void handleContent(AReadContext readcontext) throws Exception
{
if(readcontext.getReadIgnore()==0)
readcontext.getTopStackElement().addContent(readcontext.getParser().getText());
else if(DEBUG)
System.out.println("Ignoring: "+readcontext.getParser().getText());
// System.out.println("content: "+parser.getLocalName()+" "+content);
}
// For debugging: ReadContext -> Integer.
// private static Map stackdepth = Collections.synchronizedMap(new HashMap());
/**
* Handle the start element.
* @param readcontext The context for reading with all necessary information.
*/
protected void handleStartElement(AReadContext readcontext) throws Exception
{
IXMLReader parser = readcontext.getParser();
if(readcontext.getReadIgnore()>0)
{
readcontext.setReadIgnore(readcontext.getReadIgnore()+1);
if(DEBUG)
System.out.println("Ignoring: "+parser.getLocalName());
}
else if(readcontext.getReadIgnore()==0)
{
// List stack = readcontext.getStack();
// Fetch for info when creating attributes.
Map rawattrs = null;
int attrcnt = parser.getAttributeCount();
if(attrcnt>0)
{
rawattrs = new HashMap();
for(int i=0; i0)
{
StackElement pse = (StackElement)readcontext.getTopStackElement();
List pathname = new ArrayList();
pathname.add(localname);
for(int i=readcontext.getStackSize()-2; i>=0 && pse.getObject()==null; i--)
{
pse = (StackElement)readcontext.getStackElement(i);
pathname.add(0, readcontext.getStackElement(i+1).getTag());
}
if(pse!=null)
{
TypeInfo patypeinfo = ((StackElement)pse).getTypeInfo();
SubobjectInfo linkinfo = getSubobjectInfoRead(localname, fullpath, patypeinfo,
readcontext.getTopStackElement()!=null? readcontext.getTopStackElement().getRawAttributes(): null);
if(linkinfo!=null && linkinfo.getAccessInfo().isIgnoreRead())
{
readcontext.setReadIgnore(readcontext.getReadIgnore()+1);
if(DEBUG)
System.out.println("Ignoring: "+parser.getLocalName());
}
}
}
if(readcontext.getReadIgnore()==0)
{
// Test if it is an object reference
String idref = rawattrs!=null? (String)rawattrs.get(SXML.IDREF): null;
if(idref!=null)
{
if(readcontext.getReadObjects().containsKey(idref))
{
object = readcontext.getReadObjects().get(idref);
StackElement se = new StackElement(handler, localname, object, rawattrs, typeinfo, parser.getLocation());
readcontext.addStackElement(se);
}
else
{
StackElement se = new StackElement(handler, localname, null, rawattrs, typeinfo, parser.getLocation());
readcontext.addStackElement(se);
readcontext.getReporter().report("idref not contained: "+idref, "idref error", se, se.getLocation());
}
}
else
{
// Create object.
// todo: do not call createObject on every tag?!
Object ti = typeinfo;
if(localname.getNamespaceURI().startsWith(SXML.PROTOCOL_TYPEINFO)
&& (typeinfo==null || typeinfo.isCreateFromTag()))
{
ti = localname;
}
try
{
object = handler.createObject(ti, readcontext.getStackSize()==0, readcontext, rawattrs);
}
catch(Exception e)
{
// e.printStackTrace();
readcontext.getReporter().report(e.toString(), "creation error", readcontext, parser.getLocation());
readcontext.removeStackElement(); // remove ignored element info from stack. otherwise parser would be confused.
readcontext.setReadIgnore(1);
}
if(DEBUG && object==null)
System.out.println("No mapping found: "+localname);
// Try to search type info via type (when tag contained type information)
if(typeinfo==null && object!=null)
{
typeinfo = handler.getTypeInfo(object, fullpath, readcontext);
}
// If object has internal id save it in the readobjects map.
String id = rawattrs!=null? (String)rawattrs.get(SXML.ID): null;
if(id!=null && object!=null)
{
// System.out.println("ID: "+id+", "+object.getClass());
readcontext.getReadObjects().put(id, object);
}
readcontext.addStackElement(new StackElement(handler, localname, object, rawattrs, typeinfo, parser.getLocation()));
// Handle attributes.
int atcnt = attrcnt;
if(rawattrs!=null)
{
if(rawattrs.containsKey(SXML.ID))
atcnt--;
if(rawattrs.containsKey(SXML.ARRAYLEN))
atcnt--;
Collection attrinfos = typeinfo==null? null: typeinfo.getAttributeInfos();
if(attrinfos!=null)
{
for(AttributeInfo attrinfo: attrinfos)
{
boolean contains = rawattrs.containsKey(attrinfo.getAccessInfo().getXmlObjectName().getLocalPart());
boolean ignore = attrinfo.isIgnoreRead();
if(contains && ignore)
{
atcnt--;
}
}
}
}
if(atcnt>0)
{
List attrpath = null;
// If no type use last element from stack to map attributes.
if(object==null)
{
attrpath = new ArrayList();
attrpath.add(readcontext.getTopStackElement().getTag());
for(int i=readcontext.getStackSize()-2; i>=0 && object==null; i--)
{
StackElement pse = readcontext.getStackElement(i);
attrpath.add(pse.getTag());
typeinfo = pse.getTypeInfo();
object = pse.getObject();
}
}
// Handle attributes
if(object!=null)
{
Set attrs = typeinfo==null? Collections.EMPTY_SET: typeinfo.getXMLAttributeNames();
for(int i=0; i key = new LinkedList();
key.add(attrname);
for(int j=0; attrinfo==null && j it=attrs.iterator(); it.hasNext(); )
{
Object key = it.next();
if(key instanceof QName) // ignore path entries of same attributes.
{
Object attrinfo = typeinfo.getAttributeInfo(key);
// Hack. want to read attribute info here
handler.handleAttributeValue(object, (QName)key , attrpath, null, attrinfo, readcontext);
}
}
}
else
{
StackElement se = readcontext.getTopStackElement();
readcontext.getReporter().report("No element on stack for attributes", "stack error", se, se.getLocation());
}
}
// Handle comment.
if(readcontext.getComment()!=null && typeinfo!=null)
{
Object commentinfo = typeinfo.getCommentInfo();
if(commentinfo!=null)
{
handler.handleAttributeValue(object, null, null, readcontext.getComment(), commentinfo,
readcontext);
}
}
}
}
readcontext.setComment(null);
// System.out.println("start: "+parser.getLocalName());
}
}
/**
* Handle the end element.
* @param readcontext The context for reading with all necessary information.
*/
protected void handleEndElement(final AReadContext readcontext) throws Exception
{
if(readcontext.getReadIgnore()==0)
{
IXMLReader parser = readcontext.getParser();
// List stack = readcontext.getStack();
StackElement topse = readcontext.getTopStackElement();
// System.out.println("end: "+parser.getLocalName());
// QName localname = parser.getPrefix()==null || parser.getPrefix()==XMLConstants.DEFAULT_NS_PREFIX? new QName(parser.getLocalName())
// : new QName(parser.getNamespaceURI(), parser.getLocalName(), parser.getPrefix());
jadex.xml.stax.QName localname = parser.getName();
jadex.xml.stax.QName[] fullpath = readcontext.getXMLPath();
final TypeInfo typeinfo = readcontext.getPathManager().getTypeInfo(localname, fullpath, topse.getRawAttributes());
// Hack. Change object to content when it is element of its own.
if((topse.getObject()==null && topse.getContent()!=null && topse.getContent().trim().length()>0) || topse.getObject()==STRING_MARKER)
{
// Handle possible content type conversion.
Object val = topse.getContent()!=null? topse.getContent(): topse.getObject();
if(val instanceof String)
{
if(typeinfo!=null && typeinfo.getContentInfo()!=null)
{
Object coninfo = typeinfo.getContentInfo();
if(coninfo!=null && coninfo instanceof AttributeInfo)
{
IStringObjectConverter conv = ((AttributeInfo)coninfo).getConverter();
if(conv!=null)
{
val = conv.convertString((String)val, readcontext);
}
}
}
else
{
val = topse.getReaderHandler().convertContentObject((String)val, localname, readcontext);
}
}
topse = new StackElement(topse.getReaderHandler(), topse.getTag(), val, topse.getRawAttributes(), null, topse.getLocation());
readcontext.setStackElement(topse, readcontext.getStackSize()-1);
// stack.set(stack.size()-1, topse);
// readcontext.setTopse(topse);
}
// Handle content.
if(topse.getObject()!=null && topse.getContent()!=null && topse.getContent().trim().length()>0)
{
if(typeinfo!=null && typeinfo.getContentInfo()!=null)
{
topse.getReaderHandler().handleAttributeValue(topse.getObject(), null, null, topse.getContent(), typeinfo.getContentInfo(), readcontext);
}
else
{
StackElement se = readcontext.getTopStackElement();
readcontext.getReporter().report("No content mapping for: "+topse.getContent()+" tag="+topse.getTag(), "link error", se, se.getLocation());
}
}
// Handle post-processing
final IPostProcessor[] postprocs = topse.getReaderHandler().getPostProcessors(topse.getObject(), typeinfo);
if(postprocs!=null && postprocs.length>0)
{
for(int i=0; i0 && bulklink)
{
// Invoke bulk link for the finished object (as parent).
List childs = readcontext.removeChildren(topse.getObject());
if(childs!=null)
{
IBulkObjectLinker linker = (IBulkObjectLinker)(typeinfo!=null && typeinfo.getLinker()!=null? typeinfo.getLinker(): topse.getReaderHandler());
linker.bulkLinkObjects(topse.getObject(), childs, readcontext);
}
}
if(readcontext.getStackSize()>1)
{
StackElement pse = readcontext.getStackElement(readcontext.getStackSize()-2);
ArrayList pathname = new ArrayList();
pathname.add(localname);
for(int i=readcontext.getStackSize()-3; i>=0 && pse.getObject()==null; i--)
{
pse = readcontext.getStackElement(i);
pathname.add(0, readcontext.getStackElement(i+1).getTag());
}
if(pse.getObject()!=null)
{
// System.out.println("here: "+parser.getLocalName()+" "+getXMLPath(stack)+" "+topse.getRawAttributes());
TypeInfo patypeinfo = pse.getTypeInfo();
SubobjectInfo linkinfo = getSubobjectInfoRead(localname, fullpath, patypeinfo, topse.getRawAttributes());
bulklink = patypeinfo!=null? patypeinfo.isBulkLink(): this.bulklink;
if(!bulklink)
{
IObjectLinker linker = (IObjectLinker)(patypeinfo!=null && patypeinfo.getLinker()!=null? patypeinfo.getLinker(): pse.getReaderHandler());
linker.linkObject(topse.getObject(), pse.getObject(), linkinfo==null? null: linkinfo,
pathname.toArray(new jadex.xml.stax.QName[pathname.size()]), readcontext);
// IObjectLinker linker = (IObjectLinker)(patypeinfo!=null && patypeinfo.getLinker()!=null? patypeinfo.getLinker(): null);
// boolean linked = false;
// if(linker!=null)
// {
// linked = linker.linkObject(topse.getObject(), pse.getObject(), linkinfo==null? null: linkinfo,
// pathname.toArray(new jadex.xml.stax.QName[pathname.size()]), readcontext);
// }
//
// if(!linked)
// {
// linker = pse.getReaderHandler();
// linker.linkObject(topse.getObject(), pse.getObject(), linkinfo==null? null: linkinfo,
// pathname.toArray(new jadex.xml.stax.QName[pathname.size()]), readcontext);
// }
}
else
{
// Save the finished object as child for its parent.
readcontext.addChild(pse.getObject(), new LinkData(topse.getObject(), linkinfo==null? null: linkinfo,
(jadex.xml.stax.QName[])pathname.toArray(new jadex.xml.stax.QName[pathname.size()])));
}
}
else
{
StackElement se = readcontext.getTopStackElement();
readcontext.getReporter().report("No parent object found for: "+ SUtil.arrayToString(fullpath), "link error", se, se.getLocation());
}
}
}
readcontext.removeStackElement();
}
else
{
readcontext.setReadIgnore(readcontext.getReadIgnore()-1);
}
}
protected AReadContext createReadContext(TypeInfoPathManager tipmanager, IObjectReaderHandler handler, IXMLReader parser, XMLReporter reporter, Object callcontext, ClassLoader classloader) {
return new AReadContext(tipmanager, handler, parser, reporter, callcontext, classloader);
}
protected abstract IXMLReader createXMLReader(Reader input);
protected abstract IXMLReader createXMLReader(InputStream input);
}
