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package com.sun.xml.bind.v2.model.core;
import java.util.Collection;
import java.util.Set;
import javax.xml.namespace.QName;
/**
* {@link PropertyInfo} that holds references to other {@link Element}s.
*
* @author Kohsuke Kawaguchi
*/
public interface ReferencePropertyInfo<T,C> extends PropertyInfo<T,C> {
/**
* Returns the information about the possible elements in this property.
*
* <p>
* As of 2004/08/17, the spec only allows you to use different element names
* when a property is a collection, but I think there's really no reason
* to limit it there --- if the user wants to use a different tag name
* for different objects, I don't see why this can be limited to collections.
*
* <p>
* So this is a generalization of the spec. We always allow a property to have
* multiple types and use different tag names for it, depending on the actual type.
*
* <p>
* In most of the cases, this collection only contains 1 item. So the runtime system
* is encouraged to provide a faster code-path that is optimized toward such cases.
*
* @return
* Always non-null. Contains at least one entry.
*/
Set<? extends Element<T,C>> getElements();
/**
* {@inheritDoc}.
*
* If this {@link ReferencePropertyInfo} has a wildcard in it,
* then the returned list will contain {@link WildcardTypeInfo}.
*/
Collection<? extends TypeInfo<T,C>> ref();
/**
* Gets the wrapper element name.
*
* @return
* must be null if not collection. If the property is a collection,
* this can be null (in which case there'll be no wrapper),
* or it can be non-null (in which case there'll be a wrapper)
*/
QName getXmlName();
/**
* Returns true if this property is nillable
* (meaning the absence of the value is treated as nil='true')
*
* <p>
* This method is only used when this property is a collection.
*/
boolean isCollectionNillable();
/**
* Checks if the wrapper element is required.
*
* @return
* Always false if {@link #getXmlName()}==null.
*/
boolean isCollectionRequired();
/**
* Returns true if this property can hold {@link String}s to represent
* mixed content model.
*/
boolean isMixed();
/**
* If this property supports the wildcard, returns its mode.
*
* @return null
* if the wildcard is not allowed on this element.
*/
WildcardMode getWildcard();
/**
* If this property supports the wildcard, returns its DOM handler.
*
* @return null
* if the wildcard is not allowed on this element.
*/
C getDOMHandler();
/**
* Returns true if this element is mandatory.
*/
boolean isRequired();
Adapter<T,C> getAdapter();
}