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package org.checkerframework.dataflow.cfg.node;
/*>>>
import org.checkerframework.checker.nullness.qual.Nullable;
*/
import org.checkerframework.dataflow.util.HashCodeUtils;
import org.checkerframework.javacutil.InternalUtils;
import org.checkerframework.javacutil.TreeUtils;
import java.util.Collection;
import java.util.Collections;
import javax.lang.model.element.Element;
import com.sun.source.tree.IdentifierTree;
import com.sun.source.tree.MemberSelectTree;
import com.sun.source.tree.Tree;
/**
* A node representing a package name used in an expression such as a
* constructor invocation
*
* <p>
* <em>package</em>.class.object(...)
* <p>
* parent.<em>package</em>.class.object(...)
*
* @author Stefan Heule
* @author Charlie Garrett
*
*/
public class PackageNameNode extends Node {
protected final Tree tree;
// The package named by this node
protected final Element element;
/** The parent name, if any. */
protected final /*@Nullable*/ PackageNameNode parent;
public PackageNameNode(IdentifierTree tree) {
super(InternalUtils.typeOf(tree));
this.tree = tree;
this.element = TreeUtils.elementFromUse(tree);
this.parent = null;
}
public PackageNameNode(MemberSelectTree tree, PackageNameNode parent) {
super(InternalUtils.typeOf(tree));
this.tree = tree;
this.element = TreeUtils.elementFromUse(tree);
this.parent = parent;
}
public Element getElement() {
return element;
}
public PackageNameNode getParent() {
return parent;
}
@Override
public Tree getTree() {
return tree;
}
@Override
public <R, P> R accept(NodeVisitor<R, P> visitor, P p) {
return visitor.visitPackageName(this, p);
}
@Override
public String toString() {
return getElement().getSimpleName().toString();
}
@Override
public boolean equals(Object obj) {
if (obj == null || !(obj instanceof PackageNameNode)) {
return false;
}
PackageNameNode other = (PackageNameNode) obj;
if (getParent() == null) {
return other.getParent() == null
&& getElement().equals(other.getElement());
} else {
return getParent().equals(other.getParent())
&& getElement().equals(other.getElement());
}
}
@Override
public int hashCode() {
if (parent == null) {
return HashCodeUtils.hash(getElement());
}
return HashCodeUtils.hash(getElement(), getParent());
}
@Override
public Collection<Node> getOperands() {
if (parent == null) {
return Collections.emptyList();
}
return Collections.singleton((Node) parent);
}
}
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