/*******************************************************************************
* Copyright (c) 2000, 2011 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types;
public final class SuperWildcardType extends WildcardType {
protected SuperWildcardType(TypeEnvironment environment) {
super(environment);
}
@Override
public TType getErasure() {
return getEnvironment().getJavaLangObject();
}
@Override
public int getKind() {
return SUPER_WILDCARD_TYPE;
}
@Override
protected boolean doCanAssignTo(TType lhs) {
switch(lhs.getKind()) {
case STANDARD_TYPE:
return ((StandardType)lhs).isJavaLangObject();
case UNBOUND_WILDCARD_TYPE:
return true;
case EXTENDS_WILDCARD_TYPE:
return ((ExtendsWildcardType)lhs).getBound().isJavaLangObject();
case SUPER_WILDCARD_TYPE:
return ((SuperWildcardType)lhs).getBound().canAssignTo(this.getBound());
case TYPE_VARIABLE:
return ((TypeVariable)lhs).isUnbounded();
case CAPTURE_TYPE:
return ((CaptureType)lhs).checkLowerBound(this);
default:
return false;
}
}
@Override
protected boolean checkTypeArgument(TType rhs) {
switch(rhs.getKind()) {
case ARRAY_TYPE:
case STANDARD_TYPE:
case PARAMETERIZED_TYPE:
case RAW_TYPE:
return getBound().canAssignTo(rhs);
case UNBOUND_WILDCARD_TYPE:
return false;
case EXTENDS_WILDCARD_TYPE:
return false;
case SUPER_WILDCARD_TYPE:
return getBound().canAssignTo(((SuperWildcardType)rhs).getBound());
case TYPE_VARIABLE:
return getBound().canAssignTo(rhs);
case CAPTURE_TYPE:
return checkTypeArgument(((CaptureType)rhs).getWildcard());
default:
return false;
}
}
@Override
protected boolean checkAssignmentBound(TType rhs) {
// ? super Number is a set of all super types of number including
// Number. So I can only assign objects which are a subtype of
// Number.
return rhs.canAssignTo(getBound());
}
@Override
public String getName() {
return internalGetName("super"); //$NON-NLS-1$
}
@Override
protected String getPlainPrettySignature() {
return internalGetPrettySignature("super"); //$NON-NLS-1$
}
}