dataflow.src.org.checkerframework.dataflow.cfg.node.MethodAccessNode Maven / Gradle / Ivy

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The Checker Framework enhances Java’s type system to make it more powerful and useful. This lets software developers detect and prevent errors in their Java programs. The Checker Framework includes compiler plug-ins ("checkers") that find bugs or verify their absence. It also permits you to write your own compiler plug-ins.

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package org.checkerframework.dataflow.cfg.node;

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

import javax.lang.model.element.ExecutableElement;

import org.checkerframework.dataflow.util.HashCodeUtils;

import org.checkerframework.javacutil.InternalUtils;
import org.checkerframework.javacutil.TreeUtils;

import com.sun.source.tree.ExpressionTree;
import com.sun.source.tree.Tree;

/**
 * A node for a method access, including a method accesses:
 *
 *  *   expression . method ()
 * 
 *
 * @author Stefan Heule
 *
 */
public class MethodAccessNode extends Node {

    protected ExpressionTree tree;
    protected ExecutableElement method;
    protected Node receiver;

    // TODO: add method to get modifiers (static, access level, ..)

    public MethodAccessNode(ExpressionTree tree, Node receiver) {
        super(InternalUtils.typeOf(tree));
        assert TreeUtils.isMethodAccess(tree);
        this.tree = tree;
        this.method = (ExecutableElement) TreeUtils.elementFromUse(tree);
        this.receiver = receiver;
    }

    public ExecutableElement getMethod() {
        return method;
    }

    public Node getReceiver() {
        return receiver;
    }

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

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

    @Override
    public String toString() {
        return getReceiver() + "." + method.getSimpleName();
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null || !(obj instanceof MethodAccessNode)) {
            return false;
        }
        MethodAccessNode other = (MethodAccessNode) obj;
        return getReceiver().equals(other.getReceiver())
                && getMethod().equals(other.getMethod());
    }

    @Override
    public int hashCode() {
        return HashCodeUtils.hash(getReceiver(), getMethod());
    }

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