dataflow.src.org.checkerframework.dataflow.cfg.node.ArrayCreationNode 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 org.checkerframework.checker.nullness.qual.Nullable;
*/

import org.checkerframework.dataflow.util.HashCodeUtils;

import java.util.Collection;
import java.util.LinkedList;
import java.util.List;

import javax.lang.model.type.TypeMirror;

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

/**
 * A node for new array creation
 *
 *  *   new type [1][2]
 *   new type [] = { expr1, expr2, ... }
 * 
 *
 * @author Stefan Heule
 * @author Charlie Garrett
 *
 */
public class ArrayCreationNode extends Node {

    // The tree is null when an array is created for
    // variable arity method calls.
    protected /*@Nullable*/ NewArrayTree tree;
    protected List dimensions;
    protected List initializers;

    public ArrayCreationNode(/*@Nullable*/ NewArrayTree tree,
            TypeMirror type,
            List dimensions,
            List initializers) {
        super(type);
        this.tree = tree;
        this.dimensions = dimensions;
        this.initializers = initializers;
    }

    public List getDimensions() {
        return dimensions;
    }

    public Node getDimension(int i) {
        return dimensions.get(i);
    }

    public List getInitializers() {
        return initializers;
    }

    public Node getInitializer(int i) {
        return initializers.get(i);
    }

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

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

    @Override
    public String toString() {
        StringBuffer sb = new StringBuffer();
        sb.append("new " + type);
        if (!dimensions.isEmpty()) {
            boolean needComma = false;
            sb.append(" (");
            for (Node dim : dimensions) {
                if (needComma) {
                    sb.append(", ");
                }
                sb.append(dim);
                needComma = true;
            }
            sb.append(")");
        }
        if (!initializers.isEmpty()) {
            boolean needComma = false;
            sb.append(" = {");
            for (Node init : initializers) {
                if (needComma) {
                    sb.append(", ");
                }
                sb.append(init);
                needComma = true;
            }
            sb.append("}");
        }
        return sb.toString();
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null || !(obj instanceof ArrayCreationNode)) {
            return false;
        }
        ArrayCreationNode other = (ArrayCreationNode) obj;

        return getDimensions().equals(other.getDimensions())
                && getInitializers().equals(other.getInitializers());
    }

    @Override
    public int hashCode() {
        int hash = 0;
        for (Node dim : dimensions) {
            hash = HashCodeUtils.hash(hash, dim.hashCode());
        }
        for (Node init : initializers) {
            hash = HashCodeUtils.hash(hash, init.hashCode());
        }
        return hash;
    }

    @Override
    public Collection getOperands() {
        LinkedList list = new LinkedList();
        list.addAll(dimensions);
        list.addAll(initializers);
        return list;
    }
}