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/*
* Copyright (C) 2007-2010 Júlio Vilmar Gesser.
* Copyright (C) 2011, 2013-2016 The JavaParser Team.
*
* This file is part of JavaParser.
*
* JavaParser can be used either under the terms of
* a) the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* b) the terms of the Apache License
*
* You should have received a copy of both licenses in LICENCE.LGPL and
* LICENCE.APACHE. Please refer to those files for details.
*
* JavaParser is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*/
package com.github.javaparser.resolution.types;
import com.github.javaparser.resolution.declarations.ResolvedTypeParameterDeclaration;
import java.util.List;
import java.util.Map;
/**
* A wildcard can be:
* - unbounded (?)
* - have a lower bound (? super Number)
* - have an upper bound (? extends Number)
* It is not possible to have both a lower and an upper bound at the same time.
*
* @author Federico Tomassetti
*/
public class ResolvedWildcard implements ResolvedType {
public static ResolvedWildcard UNBOUNDED = new ResolvedWildcard(null, null);
private BoundType type;
private ResolvedType boundedType;
private ResolvedWildcard(BoundType type, ResolvedType boundedType) {
if (type == null && boundedType != null) {
throw new IllegalArgumentException();
}
if (type != null && boundedType == null) {
throw new IllegalArgumentException();
}
this.type = type;
this.boundedType = boundedType;
}
public static ResolvedWildcard superBound(ResolvedType type) {
return new ResolvedWildcard(BoundType.SUPER, type);
}
public static ResolvedWildcard extendsBound(ResolvedType type) {
return new ResolvedWildcard(BoundType.EXTENDS, type);
}
@Override
public String toString() {
return "WildcardUsage{" +
"type=" + type +
", boundedType=" + boundedType +
'}';
}
public boolean isWildcard() {
return true;
}
public ResolvedWildcard asWildcard() {
return this;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof ResolvedWildcard)) return false;
ResolvedWildcard that = (ResolvedWildcard) o;
if (boundedType != null ? !boundedType.equals(that.boundedType) : that.boundedType != null) return false;
if (type != that.type) return false;
return true;
}
@Override
public int hashCode() {
int result = type != null ? type.hashCode() : 0;
result = 31 * result + (boundedType != null ? boundedType.hashCode() : 0);
return result;
}
@Override
public String describe() {
if (type == null) {
return "?";
} else if (type == BoundType.SUPER) {
return "? super " + boundedType.describe();
} else if (type == BoundType.EXTENDS) {
return "? extends " + boundedType.describe();
} else {
throw new UnsupportedOperationException();
}
}
public boolean isSuper() {
return type == BoundType.SUPER;
}
public boolean isExtends() {
return type == BoundType.EXTENDS;
}
public boolean isBounded() {
return isSuper() || isExtends();
}
public ResolvedType getBoundedType() {
if (boundedType == null) {
throw new IllegalStateException();
}
return boundedType;
}
@Override
public boolean isAssignableBy(ResolvedType other) {
if (boundedType == null) {
//return other.isReferenceType() && other.asReferenceType().getQualifiedName().equals(Object.class.getCanonicalName());
return false;
} else if (type == BoundType.SUPER) {
return boundedType.isAssignableBy(other);
} else if (type == BoundType.EXTENDS) {
return false;
} else {
throw new RuntimeException();
}
}
@Override
public ResolvedType replaceTypeVariables(ResolvedTypeParameterDeclaration tpToReplace, ResolvedType replaced, Map<ResolvedTypeParameterDeclaration, ResolvedType> inferredTypes) {
if (replaced == null) {
throw new IllegalArgumentException();
}
if (boundedType == null) {
return this;
}
ResolvedType boundedTypeReplaced = boundedType.replaceTypeVariables(tpToReplace, replaced, inferredTypes);
if (boundedTypeReplaced == null) {
throw new RuntimeException();
}
if (boundedTypeReplaced != boundedType) {
return new ResolvedWildcard(type, boundedTypeReplaced);
} else {
return this;
}
}
@Override
public boolean mention(List<ResolvedTypeParameterDeclaration> typeParameters) {
return boundedType != null && boundedType.mention(typeParameters);
}
public boolean isUpperBounded() {
return isSuper();
}
public boolean isLowerBounded() {
return isExtends();
}
public enum BoundType {
SUPER,
EXTENDS
}
}
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