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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();
}
}
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