/*
* Copied from Gentyref project http://code.google.com/p/gentyref/
* Reformatted and moved to fit package structure
*/
package com.vercer.engine.persist.util.generic;
import java.lang.reflect.Type;
import java.lang.reflect.WildcardType;
import java.util.Arrays;
class WildcardTypeImpl implements WildcardType
{
private final Type[] upperBounds;
private final Type[] lowerBounds;
public WildcardTypeImpl(Type[] upperBounds, Type[] lowerBounds)
{
if (upperBounds.length == 0)
throw new IllegalArgumentException(
"There must be at least one upper bound. For an unbound wildcard, the upper bound must be Object");
this.upperBounds = upperBounds;
this.lowerBounds = lowerBounds;
}
public Type[] getUpperBounds()
{
return upperBounds;
}
public Type[] getLowerBounds()
{
return lowerBounds;
}
@Override
public boolean equals(Object obj)
{
if (!(obj instanceof WildcardType))
return false;
WildcardType other = (WildcardType) obj;
return Arrays.equals(lowerBounds, other.getLowerBounds())
&& Arrays.equals(upperBounds, other.getUpperBounds());
}
@Override
public int hashCode()
{
return Arrays.hashCode(lowerBounds) ^ Arrays.hashCode(upperBounds);
}
@Override
public String toString()
{
if (lowerBounds.length > 0)
{
return "? super " + GenericTypeReflector.getTypeName(lowerBounds[0]);
}
else if (upperBounds[0] == Object.class)
{
return "?";
}
else
{
return "? extends " + GenericTypeReflector.getTypeName(upperBounds[0]);
}
}
}