| package org.checkerframework.dataflow.cfg.node; |
| |
| import com.sun.source.tree.LiteralTree; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Objects; |
| import org.checkerframework.checker.nullness.qual.Nullable; |
| import org.checkerframework.javacutil.TreeUtils; |
| |
| /** |
| * A node for a literals that have some form of value: |
| * |
| * <ul> |
| * <li>integer literal |
| * <li>long literal |
| * <li>char literal |
| * <li>string literal |
| * <li>float literal |
| * <li>double literal |
| * <li>boolean literal |
| * <li>null literal |
| * </ul> |
| */ |
| public abstract class ValueLiteralNode extends Node { |
| |
| /** The tree for the value literal. */ |
| protected final LiteralTree tree; |
| |
| /** |
| * Returns the value of the literal, null for the null literal. |
| * |
| * @return the value of the literal, null for the null literal |
| */ |
| public abstract @Nullable Object getValue(); |
| |
| protected ValueLiteralNode(LiteralTree tree) { |
| super(TreeUtils.typeOf(tree)); |
| this.tree = tree; |
| } |
| |
| @Override |
| public LiteralTree getTree() { |
| return tree; |
| } |
| |
| @Override |
| public String toString() { |
| return String.valueOf(getValue()); |
| } |
| |
| @Override |
| public boolean equals(@Nullable Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (!(obj instanceof ValueLiteralNode)) { |
| return false; |
| } |
| ValueLiteralNode other = (ValueLiteralNode) obj; |
| Object val = getValue(); |
| Object otherVal = other.getValue(); |
| return Objects.equals(val, otherVal); |
| } |
| |
| @Override |
| public int hashCode() { |
| // value might be null |
| return Objects.hash(this.getClass(), getValue()); |
| } |
| |
| @Override |
| public Collection<Node> getOperands() { |
| return Collections.emptyList(); |
| } |
| } |