| package org.checkerframework.dataflow.cfg.node; |
| |
| import java.util.Collection; |
| import java.util.LinkedList; |
| |
| import javax.lang.model.type.TypeKind; |
| import javax.lang.model.util.Types; |
| |
| import org.checkerframework.dataflow.util.HashCodeUtils; |
| |
| import com.sun.source.tree.CaseTree; |
| import com.sun.source.tree.Tree.Kind; |
| |
| /** |
| * A node for a case in a switch statement. Although |
| * a case has no abstract value, it can imply facts about |
| * the abstract values of its operands. |
| * |
| * <pre> |
| * case <em>constant</em>: |
| * </pre> |
| * |
| * @author Stefan Heule |
| * @author Charlie Garrett |
| * |
| */ |
| public class CaseNode extends Node { |
| |
| protected CaseTree tree; |
| protected Node switchExpr; |
| protected Node caseExpr; |
| |
| public CaseNode(CaseTree tree, Node switchExpr, Node caseExpr, Types types) { |
| super(types.getNoType(TypeKind.NONE)); |
| assert tree.getKind().equals(Kind.CASE); |
| this.tree = tree; |
| this.switchExpr = switchExpr; |
| this.caseExpr = caseExpr; |
| } |
| |
| public Node getSwitchOperand() { |
| return switchExpr; |
| } |
| |
| public Node getCaseOperand() { |
| return caseExpr; |
| } |
| |
| @Override |
| public CaseTree getTree() { |
| return tree; |
| } |
| |
| @Override |
| public <R, P> R accept(NodeVisitor<R, P> visitor, P p) { |
| return visitor.visitCase(this, p); |
| } |
| |
| @Override |
| public String toString() { |
| return "case " + getCaseOperand() + ":"; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == null || !(obj instanceof CaseNode)) { |
| return false; |
| } |
| CaseNode other = (CaseNode) obj; |
| return getSwitchOperand().equals(other.getSwitchOperand()) |
| && getCaseOperand().equals(other.getCaseOperand()); |
| } |
| |
| @Override |
| public int hashCode() { |
| return HashCodeUtils.hash(getSwitchOperand(), getCaseOperand()); |
| } |
| |
| @Override |
| public Collection<Node> getOperands() { |
| LinkedList<Node> list = new LinkedList<Node>(); |
| list.add(getSwitchOperand()); |
| list.add(getCaseOperand()); |
| return list; |
| } |
| } |