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package com.sun.tools.xjc.reader.internalizer;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.UnmarshallerHandler;
import javax.xml.validation.ValidatorHandler;
import com.sun.istack.NotNull;
import com.sun.istack.SAXParseException2;
import com.sun.tools.xjc.ErrorReceiver;
import com.sun.tools.xjc.reader.xmlschema.bindinfo.BIDeclaration;
import com.sun.tools.xjc.reader.xmlschema.bindinfo.BindInfo;
import com.sun.tools.xjc.util.ForkContentHandler;
import com.sun.tools.xjc.util.DOMUtils;
import com.sun.xml.xsom.SCD;
import com.sun.xml.xsom.XSAnnotation;
import com.sun.xml.xsom.XSComponent;
import com.sun.xml.xsom.XSSchemaSet;
import org.w3c.dom.Element;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
/**
* Set of binding nodes that have target nodes specified via SCD.
*
* This is parsed during {@link Internalizer} works on the tree,
* but applying this has to wait for {@link XSSchemaSet} to be parsed.
*
* @author Kohsuke Kawaguchi
* @see SCD
*/
public final class SCDBasedBindingSet {
/**
* Represents the target schema component of the
* customization identified by SCD.
*
* @author Kohsuke Kawaguchi
*/
final class Target {
/**
* SCDs can be specified via multiple steps, like:
*
*
* <bindings scd="foo/bar">
* <bindings scd="zot/xyz">
*
*
* This field and {@link #nextSibling} form a single-linked list that
* represent the children that shall be evaluated within this target.
* Think of it as {@code List}.
*/
private Target firstChild;
private final Target nextSibling;
/**
* Compiled SCD.
*/
private final @NotNull SCD scd;
/**
* The element on which SCD was found.
*/
private final @NotNull Element src;
/**
* Bindings that apply to this SCD.
*/
private final List bindings = new ArrayList();
private Target(Target parent, Element src, SCD scd) {
if(parent==null) {
this.nextSibling = topLevel;
topLevel = this;
} else {
this.nextSibling = parent.firstChild;
parent.firstChild = this;
}
this.src = src;
this.scd = scd;
}
/**
* Adds a new binding declaration to be associated to the schema component
* identified by {@link #scd}.
*/
void addBinidng(Element binding) {
bindings.add(binding);
}
/**
* Applies bindings to the schema component for this and its siblings.
*/
private void applyAll(Collection contextNode) {
for( Target self=this; self!=null; self=self.nextSibling )
self.apply(contextNode);
}
/**
* Applies bindings to the schema component for just this node.
*/
private void apply(Collection contextNode) {
// apply the SCD...
Collection childNodes = scd.select(contextNode);
if(childNodes.isEmpty()) {
// no node matched
if(src.getAttributeNode("if-exists")!=null) {
// if this attribute exists, it's not an error if SCD didn't match.
return;
}
reportError( src, Messages.format(Messages.ERR_SCD_EVALUATED_EMPTY,scd) );
return;
}
if(firstChild!=null)
firstChild.applyAll(childNodes);
if(!bindings.isEmpty()) {
// error to match more than one components
Iterator itr = childNodes.iterator();
XSComponent target = itr.next();
if(itr.hasNext()) {
reportError( src, Messages.format(Messages.ERR_SCD_MATCHED_MULTIPLE_NODES,scd,childNodes.size()) );
errorReceiver.error( target.getLocator(), Messages.format(Messages.ERR_SCD_MATCHED_MULTIPLE_NODES_FIRST) );
errorReceiver.error( itr.next().getLocator(), Messages.format(Messages.ERR_SCD_MATCHED_MULTIPLE_NODES_SECOND) );
}
// apply bindings to the target
for (Element binding : bindings) {
for (Element item : DOMUtils.getChildElements(binding)) {
String localName = item.getLocalName();
if ("bindings".equals(localName))
continue; // this should be already in Target.bindings of some SpecVersion.
try {
new DOMForestScanner(forest).scan(item,loader);
BIDeclaration decl = (BIDeclaration)unmarshaller.getResult();
// add this binding to the target
XSAnnotation ann = target.getAnnotation(true);
BindInfo bi = (BindInfo)ann.getAnnotation();
if(bi==null) {
bi = new BindInfo();
ann.setAnnotation(bi);
}
bi.addDecl(decl);
} catch (SAXException e) {
// the error should have already been reported.
} catch (JAXBException e) {
// if validation didn't fail, then unmarshalling can't go wrong
throw new AssertionError(e);
}
}
}
}
}
}
private Target topLevel;
/**
* The forest where binding elements came from. Needed to report line numbers for errors.
*/
private final DOMForest forest;
// variables used only during the apply method
//
private ErrorReceiver errorReceiver;
private UnmarshallerHandler unmarshaller;
private ForkContentHandler loader; // unmarshaller+validator
SCDBasedBindingSet(DOMForest forest) {
this.forest = forest;
}
Target createNewTarget(Target parent, Element src, SCD scd) {
return new Target(parent,src,scd);
}
/**
* Applies the additional binding customizations.
*/
public void apply(XSSchemaSet schema, ErrorReceiver errorReceiver) {
if(topLevel!=null) {
this.errorReceiver = errorReceiver;
Unmarshaller u = BindInfo.getCustomizationUnmarshaller();
this.unmarshaller = u.getUnmarshallerHandler();
ValidatorHandler v = BindInfo.bindingFileSchema.newValidator();
v.setErrorHandler(errorReceiver);
loader = new ForkContentHandler(v,unmarshaller);
topLevel.applyAll(schema.getSchemas());
this.loader = null;
this.unmarshaller = null;
this.errorReceiver = null;
}
}
private void reportError( Element errorSource, String formattedMsg ) {
reportError( errorSource, formattedMsg, null );
}
private void reportError( Element errorSource,
String formattedMsg, Exception nestedException ) {
SAXParseException e = new SAXParseException2( formattedMsg,
forest.locatorTable.getStartLocation(errorSource),
nestedException );
errorReceiver.error(e);
}
}
