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Rhino is an open-source implementation of JavaScript written entirely in Java. It is typically embedded into Java applications to provide scripting to end users.
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/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

package org.mozilla.javascript.xmlimpl;

import org.mozilla.javascript.*;

class XMLName extends Ref {
    static final long serialVersionUID = 3832176310755686977L;

    private static boolean isNCNameStartChar(int c) {
        if ((c & ~0x7F) == 0) {
            // Optimize for ASCII and use A..Z < _ < a..z
            if (c >= 'a') {
                return c <= 'z';
            } else if (c >= 'A') {
                if (c <= 'Z') {
                    return true;
                }
                return c == '_';
            }
        } else if ((c & ~0x1FFF) == 0) {
            return (0xC0 <= c && c <= 0xD6)
            || (0xD8 <= c && c <= 0xF6)
            || (0xF8 <= c && c <= 0x2FF)
            || (0x370 <= c && c <= 0x37D)
            || 0x37F <= c;
        }
        return (0x200C <= c && c <= 0x200D)
        || (0x2070 <= c && c <= 0x218F)
        || (0x2C00 <= c && c <= 0x2FEF)
        || (0x3001 <= c && c <= 0xD7FF)
        || (0xF900 <= c && c <= 0xFDCF)
        || (0xFDF0 <= c && c <= 0xFFFD)
        || (0x10000 <= c && c <= 0xEFFFF);
    }

    private static boolean isNCNameChar(int c) {
        if ((c & ~0x7F) == 0) {
            // Optimize for ASCII and use - < . < 0..9 < A..Z < _ < a..z
            if (c >= 'a') {
                return c <= 'z';
            } else if (c >= 'A') {
                if (c <= 'Z') {
                    return true;
                }
                return c == '_';
            } else if (c >= '0') {
                return c <= '9';
            } else {
                return c == '-' || c == '.';
            }
        } else if ((c & ~0x1FFF) == 0) {
            return isNCNameStartChar(c) || c == 0xB7
                || (0x300 <= c && c <= 0x36F);
        }
        return isNCNameStartChar(c) || (0x203F <= c && c <= 0x2040);
    }

    //    This means "accept" in the parsing sense
    //    See ECMA357 13.1.2.1
    static boolean accept(Object nameObj) {
        String name;
        try {
            name = ScriptRuntime.toString(nameObj);
        } catch (EcmaError ee) {
            if ("TypeError".equals(ee.getName())) {
                return false;
            }
            throw ee;
        }

        // See http://w3.org/TR/xml-names11/#NT-NCName
        int length = name.length();
        if (length != 0) {
            if (isNCNameStartChar(name.charAt(0))) {
                for (int i = 1; i != length; ++i) {
                    if (!isNCNameChar(name.charAt(i))) {
                        return false;
                    }
                }
                return true;
            }
        }

        return false;
    }

    private XmlNode.QName qname;
    private boolean isAttributeName;
    private boolean isDescendants;
    private XMLObjectImpl xmlObject;

    private XMLName() {
    }

    static XMLName formStar() {
        XMLName rv = new XMLName();
        rv.qname = XmlNode.QName.create(null, null);
        return rv;
    }

    /** @deprecated */
    @Deprecated
    static XMLName formProperty(XmlNode.Namespace namespace, String localName) {
        if (localName != null && localName.equals("*")) localName = null;
        XMLName rv = new XMLName();
        rv.qname = XmlNode.QName.create(namespace, localName);
        return rv;
    }

    /** TODO: marked deprecated by original author */
    static XMLName formProperty(String uri, String localName) {
        return formProperty(XmlNode.Namespace.create(uri), localName);
    }

    /** TODO: marked deprecated by original implementor */
    static XMLName create(String defaultNamespaceUri, String name) {
        if (name == null)
            throw new IllegalArgumentException();

        int l = name.length();
        if (l != 0) {
            char firstChar = name.charAt(0);
            if (firstChar == '*') {
                if (l == 1) {
                    return XMLName.formStar();
                }
            } else if (firstChar == '@') {
                XMLName xmlName = XMLName.formProperty("", name.substring(1));
                xmlName.setAttributeName();
                return xmlName;
            }
        }

        return XMLName.formProperty(defaultNamespaceUri, name);
    }

    static XMLName create(XmlNode.QName qname, boolean attribute, boolean descendants) {
        XMLName rv = new XMLName();
        rv.qname = qname;
        rv.isAttributeName = attribute;
        rv.isDescendants = descendants;
        return rv;
    }

    /** @deprecated */
    @Deprecated
    static XMLName create(XmlNode.QName qname) {
        return create(qname, false, false);
    }

    void initXMLObject(XMLObjectImpl xmlObject) {
        if (xmlObject == null) throw new IllegalArgumentException();
        if (this.xmlObject != null) throw new IllegalStateException();
        this.xmlObject = xmlObject;
    }

    String uri() {
        if (qname.getNamespace() == null) return null;
        return qname.getNamespace().getUri();
    }

    String localName() {
        if (qname.getLocalName() == null) return "*";
        return qname.getLocalName();
    }

    private void addDescendantChildren(XMLList list, XML target) {
        XMLName xmlName = this;
        if (target.isElement()) {
            XML[] children = target.getChildren();
            for (int i=0; i