| package org.checkerframework.dataflow.cfg.node; |
| |
| import com.sun.source.tree.BinaryTree; |
| import com.sun.source.tree.Tree.Kind; |
| import org.checkerframework.dataflow.util.HashCodeUtils; |
| |
| /** |
| * A node for string concatenation: |
| * |
| * <pre> |
| * <em>expression</em> + <em>expression</em> |
| * </pre> |
| * |
| * @author Stefan Heule |
| * @author Charlie Garrett |
| */ |
| public class StringConcatenateNode extends BinaryOperationNode { |
| |
| public StringConcatenateNode(BinaryTree tree, Node left, Node right) { |
| super(tree, left, right); |
| assert tree.getKind() == Kind.PLUS; |
| } |
| |
| @Override |
| public <R, P> R accept(NodeVisitor<R, P> visitor, P p) { |
| return visitor.visitStringConcatenate(this, p); |
| } |
| |
| @Override |
| public String toString() { |
| return "(" + getLeftOperand() + " + " + getRightOperand() + ")"; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == null || !(obj instanceof StringConcatenateNode)) { |
| return false; |
| } |
| StringConcatenateNode other = (StringConcatenateNode) obj; |
| return getLeftOperand().equals(other.getLeftOperand()) |
| && getRightOperand().equals(other.getRightOperand()); |
| } |
| |
| @Override |
| public int hashCode() { |
| return HashCodeUtils.hash(getLeftOperand(), getRightOperand()); |
| } |
| } |