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package com.sun.xml.bind.v2.runtime.property;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.Collection;
import com.sun.xml.bind.v2.model.core.ID;
import com.sun.xml.bind.v2.model.core.PropertyKind;
import com.sun.xml.bind.v2.model.runtime.RuntimeAttributePropertyInfo;
import com.sun.xml.bind.v2.model.runtime.RuntimeElementPropertyInfo;
import com.sun.xml.bind.v2.model.runtime.RuntimeNonElement;
import com.sun.xml.bind.v2.model.runtime.RuntimePropertyInfo;
import com.sun.xml.bind.v2.model.runtime.RuntimeTypeInfo;
import com.sun.xml.bind.v2.model.runtime.RuntimeValuePropertyInfo;
import com.sun.xml.bind.v2.runtime.JAXBContextImpl;
/**
* Create {@link Property} objects.
*
* @author Kohsuke Kawaguchi (kk@kohsuke.org)
*/
public abstract class PropertyFactory {
private PropertyFactory() {}
/**
* Constructors of the {@link Property} implementation.
*/
private static final Constructor<? extends Property>[] propImpls;
static {
Class<? extends Property>[] implClasses = new Class[] {
SingleElementLeafProperty.class,
null, // single reference leaf --- but there's no such thing as "reference leaf"
null, // no such thing as "map leaf"
ArrayElementLeafProperty.class,
null, // array reference leaf --- but there's no such thing as "reference leaf"
null, // no such thing as "map leaf"
SingleElementNodeProperty.class,
SingleReferenceNodeProperty.class,
SingleMapNodeProperty.class,
ArrayElementNodeProperty.class,
ArrayReferenceNodeProperty.class,
null, // map is always a single property (Map doesn't implement Collection)
};
propImpls = new Constructor[implClasses.length];
for( int i=0; i<propImpls.length; i++ ) {
if(implClasses[i]!=null)
// this pointless casting necessary for Mustang
propImpls[i] = (Constructor)implClasses[i].getConstructors()[0];
}
}
/**
* Creates/obtains a properly configured {@link Property}
* object from the given description.
*/
public static Property create( JAXBContextImpl grammar, RuntimePropertyInfo info ) {
PropertyKind kind = info.kind();
switch(kind) {
case ATTRIBUTE:
return new AttributeProperty(grammar,(RuntimeAttributePropertyInfo)info);
case VALUE:
return new ValueProperty(grammar,(RuntimeValuePropertyInfo)info);
case ELEMENT:
if(((RuntimeElementPropertyInfo)info).isValueList())
return new ListElementProperty(grammar,(RuntimeElementPropertyInfo) info);
break;
case REFERENCE:
case MAP:
break;
default:
assert false;
}
boolean isCollection = info.isCollection();
boolean isLeaf = isLeaf(info);
Constructor<? extends Property> c = propImpls[(isLeaf?0:6)+(isCollection?3:0)+kind.propertyIndex];
try {
return c.newInstance( grammar, info );
} catch (InstantiationException e) {
throw new InstantiationError(e.getMessage());
} catch (IllegalAccessException e) {
throw new IllegalAccessError(e.getMessage());
} catch (InvocationTargetException e) {
Throwable t = e.getCause();
if(t instanceof Error)
throw (Error)t;
if(t instanceof RuntimeException)
throw (RuntimeException)t;
throw new AssertionError(t);
}
}
/**
* Look for the case that can be optimized as a leaf,
* which is a kind of type whose XML representation is just PCDATA.
*/
static boolean isLeaf(RuntimePropertyInfo info) {
Collection<? extends RuntimeTypeInfo> types = info.ref();
if(types.size()!=1) return false;
RuntimeTypeInfo rti = types.iterator().next();
if(!(rti instanceof RuntimeNonElement)) return false;
if(info.id()==ID.IDREF)
// IDREF is always handled as leaf -- Transducer maps IDREF String back to an object
return true;
if(((RuntimeNonElement)rti).getTransducer()==null)
// Transducer!=null means definitely binds to PCDATA.
// even if transducer==null, a referene might be IDREF,
// in which case it will still produce PCDATA in this reference.
return false;
if(!info.getIndividualType().equals(rti.getType()))
return false;
return true;
}
}