org.checkerframework.dataflow.cfg.node.ThrowNode Maven / Gradle / Ivy

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package org.checkerframework.dataflow.cfg.node;

import com.sun.source.tree.ThrowTree;

import org.checkerframework.checker.nullness.qual.Nullable;
import org.checkerframework.dataflow.qual.SideEffectFree;

import java.util.Collection;
import java.util.Collections;
import java.util.Objects;

import javax.lang.model.type.TypeKind;
import javax.lang.model.util.Types;

/**
 * A node for exception throws:
 *
 *  *   throw expr
 * 
 */
public class ThrowNode extends Node {

    protected final ThrowTree tree;
    protected final Node expression;

    public ThrowNode(ThrowTree tree, Node expression, Types types) {
        super(types.getNoType(TypeKind.NONE));
        this.tree = tree;
        this.expression = expression;
    }

    public Node getExpression() {
        return expression;
    }

    @Override
    public ThrowTree getTree() {
        return tree;
    }

    @Override
    public  R accept(NodeVisitor visitor, P p) {
        return visitor.visitThrow(this, p);
    }

    @Override
    public String toString() {
        return "throw " + expression;
    }

    @Override
    public boolean equals(@Nullable Object obj) {
        if (!(obj instanceof ThrowNode)) {
            return false;
        }
        ThrowNode other = (ThrowNode) obj;
        return getExpression().equals(other.getExpression());
    }

    @Override
    public int hashCode() {
        return Objects.hash(ThrowNode.class, expression);
    }

    @Override
    @SideEffectFree
    public Collection getOperands() {
        return Collections.singletonList(expression);
    }
}