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package javax.lang.model.type;

import javax.lang.model.UnknownEntityException;

Indicates that an unknown kind of type was encountered. This can occur if the language evolves and new kinds of types are added to the TypeMirror hierarchy. May be thrown by a type visitor to indicate that the visitor was created for a prior version of the language. 
Author:
Joseph D. Darcy, Scott Seligman, Peter von der Ahé
See Also:
TypeVisitor.visitUnknown
Since:
1.6/**
 * Indicates that an unknown kind of type was encountered.  This can
 * occur if the language evolves and new kinds of types are added to
 * the {@code TypeMirror} hierarchy.  May be thrown by a {@linkplain
 * TypeVisitor type visitor} to indicate that the visitor was created
 * for a prior version of the language.
 *
 * @author Joseph D. Darcy
 * @author Scott Seligman
 * @author Peter von der Ahé
 * @see TypeVisitor#visitUnknown
 * @since 1.6
 */
public class UnknownTypeException extends UnknownEntityException {

    private static final long serialVersionUID = 269L;

    private transient TypeMirror type;
    private transient Object parameter;

    
Creates a new UnknownTypeException.The p parameter may be used to pass in an additional argument with information about the context in which the unknown type was encountered; for example, the visit methods of TypeVisitor may pass in their additional parameter. 
Params:
t – the unknown type, may be null
p – an additional parameter, may be null/**
     * Creates a new {@code UnknownTypeException}.The {@code p}
     * parameter may be used to pass in an additional argument with
     * information about the context in which the unknown type was
     * encountered; for example, the visit methods of {@link
     * TypeVisitor} may pass in their additional parameter.
     *
     * @param t the unknown type, may be {@code null}
     * @param p an additional parameter, may be {@code null}
     */
    public UnknownTypeException(TypeMirror t, Object p) {
        super("Unknown type: " + t);
        type = t;
        this.parameter = p;
    }

    
Returns the unknown type.
The value may be unavailable if this exception has been
serialized and then read back in.
Returns:
the unknown type, or null if unavailable/**
     * Returns the unknown type.
     * The value may be unavailable if this exception has been
     * serialized and then read back in.
     *
     * @return the unknown type, or {@code null} if unavailable
     */
    public TypeMirror getUnknownType() {
        return type;
    }

    
Returns the additional argument.
Returns:
the additional argument, or null if unavailable/**
     * Returns the additional argument.
     *
     * @return the additional argument, or {@code null} if unavailable
     */
    public Object getArgument() {
        return parameter;
    }
}