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package com.sun.msv.reader.relax.core;
import org.relaxng.datatype.DatatypeException;
import com.sun.msv.grammar.Expression;
import com.sun.msv.grammar.SimpleNameClass;
import com.sun.msv.grammar.relax.AttPoolClause;
import com.sun.msv.grammar.relax.ElementRule;
import com.sun.msv.grammar.relax.TagClause;
import com.sun.msv.reader.ExpressionState;
import com.sun.msv.reader.State;
import com.sun.msv.reader.datatype.xsd.FacetStateParent;
import com.sun.msv.reader.datatype.xsd.XSTypeIncubator;
import com.sun.msv.util.StartTagInfo;
/**
* parses <element> element.
*
* @author <a href="mailto:kohsuke.kawaguchi@eng.sun.com">Kohsuke KAWAGUCHI</a>
*/
public class InlineElementState extends ExpressionState implements FacetStateParent {
/** this field is set to null if this element has label attribute. */
protected XSTypeIncubator incubator;
public XSTypeIncubator getIncubator() { return incubator; }
protected State createChildState( StartTagInfo tag ) {
if( incubator!=null )
return ((RELAXCoreReader)reader).createFacetState(this,tag); // facets
else
return null; // nothing is allowed when @label is used.
}
protected void startSelf() {
super.startSelf();
final RELAXCoreReader reader = (RELAXCoreReader)this.reader;
String type = startTag.getAttribute("type");
String label = startTag.getAttribute("label");
if( type!=null && label!=null )
reader.reportError( RELAXCoreReader.ERR_CONFLICTING_ATTRIBUTES, "type", "label" );
// recover by ignoring one attribute.
if( type==null && label==null ) {
reader.reportError( RELAXCoreReader.ERR_MISSING_ATTRIBUTE_2, "element", "type", "label" );
type="string";
}
if( label!=null ) {
incubator = null;
} else {
incubator = reader.resolveXSDatatype(type).createIncubator();
}
}
protected Expression makeExpression() {
try {
final RELAXCoreReader reader = (RELAXCoreReader)this.reader;
final String name = startTag.getAttribute("name");
if( name==null ) {
reader.reportError( RELAXCoreReader.ERR_MISSING_ATTRIBUTE, "element","name" );
// recover by ignoring this element.
return Expression.nullSet;
}
Expression contentModel;
if( incubator!=null ) {
contentModel = incubator.derive(null,null);
} else {
// @label is used
String label = startTag.getAttribute("label");
if(label==null) throw new Error();
contentModel = reader.module.hedgeRules.getOrCreate(label);
reader.backwardReference.memorizeLink(contentModel);
}
TagClause c = new TagClause();
c.nameClass = new SimpleNameClass( ((RELAXCoreReader)reader).module.targetNamespace, name );
final String role = startTag.getAttribute("role");
if( role==null ) c.exp = Expression.epsilon; // no attribute
else {
// role attribute
AttPoolClause att = reader.module.attPools.getOrCreate(role);
c.exp = att;
reader.backwardReference.memorizeLink(att);
}
// create anonymous ElementRule. this rule will never be added to
// RefContainer.
return new ElementRule( reader.pool, c, contentModel );
} catch( DatatypeException e ) {
// derivation failed
reader.reportError( e, RELAXCoreReader.ERR_BAD_TYPE, e.getMessage() );
// recover by using harmless expression. anything will do.
return Expression.nullSet;
}
}
}