Class SimpleNode

java/org/apache/el/parser/SimpleNode.java:31–206

import org.apache.el.util.MessageFactory;

public abstract class SimpleNode implements Node {

    /*
     * Uses SimpleNode rather than Node for performance.
     *
     * See https://bz.apache.org/bugzilla/show_bug.cgi?id=68068
     */
    protected SimpleNode parent;

    protected SimpleNode[] children;

    protected final int id;

    protected String image;

    public SimpleNode(int i) {
        id = i;
    }

    @Override
    public void jjtOpen() {
        // NOOP by default
    }

    @Override
    public void jjtClose() {
        // NOOP by default
    }

    @Override
    public void jjtSetParent(Node n) {
        parent = (SimpleNode) n;
    }

    @Override
    public Node jjtGetParent() {
        return parent;
    }

    @Override
    public void jjtAddChild(Node n, int i) {
        if (children == null) {
            children = new SimpleNode[i + 1];
        } else if (i >= children.length) {
            SimpleNode[] c = new SimpleNode[i + 1];
            System.arraycopy(children, 0, c, 0, children.length);
            children = c;
        }
        children[i] = (SimpleNode) n;
    }

    @Override
    public Node jjtGetChild(int i) {
        return children[i];
    }

    @Override
    public int jjtGetNumChildren() {