dataflow.src.org.checkerframework.dataflow.cfg.node.InstanceOfNode Maven / Gradle / Ivy
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The Checker Framework enhances Java’s type system to
make it more powerful and useful. This lets software developers
detect and prevent errors in their Java programs.
The Checker Framework includes compiler plug-ins ("checkers")
that find bugs or verify their absence. It also permits you to
write your own compiler plug-ins.
package org.checkerframework.dataflow.cfg.node;
import java.util.Collection;
import java.util.Collections;
import javax.lang.model.type.TypeKind;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.util.Types;
import org.checkerframework.dataflow.util.HashCodeUtils;
import com.sun.source.tree.InstanceOfTree;
import com.sun.source.tree.Tree;
/**
* A node for the instanceof operator:
*
* x instanceof Point
*
* @author Stefan Heule
* @author Charlie Garrett
*
*/
public class InstanceOfNode extends Node {
/** The value being tested. */
protected Node operand;
/** The reference type being tested against. */
protected TypeMirror refType;
/** The tree associated with this node. */
protected final InstanceOfTree tree;
public InstanceOfNode(Tree tree, Node operand, TypeMirror refType, Types types) {
super(types.getPrimitiveType(TypeKind.BOOLEAN));
assert tree.getKind() == Tree.Kind.INSTANCE_OF;
this.tree = (InstanceOfTree) tree;
this.operand = operand;
this.refType = refType;
}
public Node getOperand() {
return operand;
}
@Override
public TypeMirror getType() {
return type;
}
public TypeMirror getRefType() {
return refType;
}
@Override
public InstanceOfTree getTree() {
return tree;
}
@Override
public R accept(NodeVisitor visitor, P p) {
return visitor.visitInstanceOf(this, p);
}
@Override
public String toString() {
return "(" + getOperand() + " instanceof " + getRefType() + ")";
}
@Override
public boolean equals(Object obj) {
if (obj == null || !(obj instanceof InstanceOfNode)) {
return false;
}
InstanceOfNode other = (InstanceOfNode) obj;
// TODO: TypeMirror.equals may be too restrictive.
// Check whether Types.isSameType is the better comparison.
return getOperand().equals(other.getOperand())
&& getRefType().equals(other.getRefType());
}
@Override
public int hashCode() {
return HashCodeUtils.hash(getOperand());
}
@Override
public Collection getOperands() {
return Collections.singletonList(getOperand());
}
}