| package org.checkerframework.dataflow.cfg.node; |
| |
| import com.sun.source.tree.LiteralTree; |
| import java.util.Collection; |
| import java.util.Collections; |
| import org.checkerframework.dataflow.util.HashCodeUtils; |
| import org.checkerframework.javacutil.InternalUtils; |
| |
| /*>>> |
| import org.checkerframework.checker.nullness.qual.Nullable; |
| */ |
| |
| /** |
| * 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> |
| * |
| * @author Stefan Heule |
| */ |
| public abstract class ValueLiteralNode extends Node { |
| |
| protected final LiteralTree tree; |
| |
| /** @return the value of the literal */ |
| public abstract /*@Nullable*/ Object getValue(); |
| |
| public ValueLiteralNode(LiteralTree tree) { |
| super(InternalUtils.typeOf(tree)); |
| this.tree = tree; |
| } |
| |
| @Override |
| public LiteralTree getTree() { |
| return tree; |
| } |
| |
| @Override |
| public String toString() { |
| return String.valueOf(getValue()); |
| } |
| |
| /** Compare the value of this nodes. */ |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == null || !(obj instanceof ValueLiteralNode)) { |
| return false; |
| } |
| ValueLiteralNode other = (ValueLiteralNode) obj; |
| Object val = getValue(); |
| Object otherVal = other.getValue(); |
| return ((val == null || otherVal == null) && val == otherVal) || val.equals(otherVal); |
| } |
| |
| @Override |
| public int hashCode() { |
| return HashCodeUtils.hash(getValue()); |
| } |
| |
| @Override |
| public Collection<Node> getOperands() { |
| return Collections.emptyList(); |
| } |
| } |