dataflow.src.org.checkerframework.dataflow.cfg.node.NotEqualNode 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.LinkedList;
import org.checkerframework.dataflow.util.HashCodeUtils;
import org.checkerframework.javacutil.InternalUtils;
import com.sun.source.tree.Tree;
import com.sun.source.tree.Tree.Kind;
/**
* A node for the not equal comparison:
*
*
* expression != expression
*
*
* @author Stefan Heule
* @author Charlie Garrett
*
*/
public class NotEqualNode extends Node {
protected Tree tree;
protected Node left;
protected Node right;
public NotEqualNode(Tree tree, Node left, Node right) {
super(InternalUtils.typeOf(tree));
assert tree.getKind() == Kind.NOT_EQUAL_TO;
this.tree = tree;
this.left = left;
this.right = right;
}
public Node getLeftOperand() {
return left;
}
public Node getRightOperand() {
return right;
}
@Override
public Tree getTree() {
return tree;
}
@Override
public R accept(NodeVisitor visitor, P p) {
return visitor.visitNotEqual(this, p);
}
@Override
public String toString() {
return "(" + getLeftOperand() + " != " + getRightOperand() + ")";
}
@Override
public boolean equals(Object obj) {
if (obj == null || !(obj instanceof NotEqualNode)) {
return false;
}
NotEqualNode other = (NotEqualNode) obj;
return getLeftOperand().equals(other.getLeftOperand())
&& getRightOperand().equals(other.getRightOperand());
}
@Override
public int hashCode() {
return HashCodeUtils.hash(getLeftOperand(), getRightOperand());
}
@Override
public Collection getOperands() {
LinkedList list = new LinkedList();
list.add(getLeftOperand());
list.add(getRightOperand());
return list;
}
}