elementnsimpl.java

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/*
 * Copyright 1999-2002,2004,2005 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.sun.org.apache.xerces.internal.dom;

import com.sun.org.apache.xerces.internal.xs.XSSimpleTypeDefinition;
import com.sun.org.apache.xerces.internal.xs.XSTypeDefinition;
import com.sun.org.apache.xerces.internal.impl.dv.xs.XSSimpleTypeDecl;
import com.sun.org.apache.xerces.internal.impl.xs.XSComplexTypeDecl;
import com.sun.org.apache.xerces.internal.util.URI;
import com.sun.org.apache.xerces.internal.xni.NamespaceContext;
import org.w3c.dom.Attr;
import org.w3c.dom.DOMException;



/**
 * ElementNSImpl inherits from ElementImpl and adds namespace support.
 * <P>
 * The qualified name is the node name, and we store localName which is also
 * used in all queries. On the other hand we recompute the prefix when
 * necessary.
 * 
 * @xerces.internal
 * 
 * @author Elena litani, IBM
 * @author Neeraj Bajaj, Sun Microsystems
 * @version $Id: ElementNSImpl.java,v 1.2.6.1 2005/08/31 12:17:52 sunithareddy Exp $
 */
public class ElementNSImpl
    extends ElementImpl {

    //
    // Constants
    //

    /** Serialization version. */
    static final long serialVersionUID = -9142310625494392642L;
    static final String xmlURI = "http://www.w3.org/XML/1998/namespace";

    //
    // Data
    //

    /** DOM2: Namespace URI. */
    protected String namespaceURI;

    /** DOM2: localName. */
    protected String localName;

    /** DOM3: type information */
    // REVISIT: we are losing the type information in DOM during serialization
    transient XSTypeDefinition type;

    protected ElementNSImpl() {
        super();
    }
    /**
     * DOM2: Constructor for Namespace implementation.
     */
    protected ElementNSImpl(CoreDocumentImpl ownerDocument,
                            String namespaceURI,
                            String qualifiedName)
        throws DOMException
    {
        super(ownerDocument, qualifiedName);
        setName(namespaceURI, qualifiedName);
    }

	private void setName(String namespaceURI, String qname) {

		String prefix;
		// DOM Level 3: namespace URI is never empty string.
		this.namespaceURI = namespaceURI;
		if (namespaceURI != null) {
            //convert the empty string to 'null'
			this.namespaceURI =	(namespaceURI.length() == 0) ? null : namespaceURI;
		}

        int colon1, colon2 ;

        //NAMESPACE_ERR:
        //1. if the qualified name is 'null' it is malformed.
        //2. or if the qualifiedName is null and the namespaceURI is different from null,
        // We dont need to check for namespaceURI != null, if qualified name is null throw DOMException.
        if(qname == null){
				String msg =
					DOMMessageFormatter.formatMessage(
						DOMMessageFormatter.DOM_DOMAIN,
						"NAMESPACE_ERR",
						null);
				throw new DOMException(DOMException.NAMESPACE_ERR, msg);
        }
        else{
		    colon1 = qname.indexOf(':');
		    colon2 = qname.lastIndexOf(':');
        }

		ownerDocument.checkNamespaceWF(qname, colon1, colon2);
		if (colon1 < 0) {
			// there is no prefix
			localName = qname;
			if (ownerDocument.errorChecking) {
			    ownerDocument.checkQName(null, localName);
			    if (qname.equals("xmlns")
			        && (namespaceURI == null
			        || !namespaceURI.equals(NamespaceContext.XMLNS_URI))
			        || (namespaceURI!=null && namespaceURI.equals(NamespaceContext.XMLNS_URI)
			        && !qname.equals("xmlns"))) {
			        String msg =
			            DOMMessageFormatter.formatMessage(
			                    DOMMessageFormatter.DOM_DOMAIN,
			                    "NAMESPACE_ERR",
			                    null);
			        throw new DOMException(DOMException.NAMESPACE_ERR, msg);
			    }
			}
		}//there is a prefix
		else {
		    prefix = qname.substring(0, colon1);
		    localName = qname.substring(colon2 + 1);
		    
		    //NAMESPACE_ERR:
		    //1. if the qualifiedName has a prefix and the namespaceURI is null,
		    
		    //2. or if the qualifiedName has a prefix that is "xml" and the namespaceURI
		    //is different from " http://www.w3.org/XML/1998/namespace"
		    
		    if (ownerDocument.errorChecking) {
		        if( namespaceURI == null || ( prefix.equals("xml") && !namespaceURI.equals(NamespaceContext.XML_URI) )){
		            String msg =
		                DOMMessageFormatter.formatMessage(
		                        DOMMessageFormatter.DOM_DOMAIN,
		                        "NAMESPACE_ERR",
		                        null);
		            throw new DOMException(DOMException.NAMESPACE_ERR, msg);
		        }
		        
		        ownerDocument.checkQName(prefix, localName);
		        ownerDocument.checkDOMNSErr(prefix, namespaceURI);
		    }
		}
	}

    // when local name is known
    protected ElementNSImpl(CoreDocumentImpl ownerDocument,
                            String namespaceURI, String qualifiedName,
                            String localName)
        throws DOMException
    {
        super(ownerDocument, qualifiedName);

        this.localName = localName;
        this.namespaceURI = namespaceURI;
    }

    // for DeferredElementImpl
    protected ElementNSImpl(CoreDocumentImpl ownerDocument,
                            String value) {
        super(ownerDocument, value);
    }

    // Support for DOM Level 3 renameNode method.
    // Note: This only deals with part of the pb. CoreDocumentImpl
    // does all the work.
    void rename(String namespaceURI, String qualifiedName)
    {
        if (needsSyncData()) {
            synchronizeData();
        }
		this.name = qualifiedName;
        setName(namespaceURI, qualifiedName);
        reconcileDefaultAttributes();
    }

    /**
     * NON-DOM: resets this node and sets specified values for the node
     *
     * @param ownerDocument
     * @param namespaceURI
     * @param qualifiedName
     * @param localName
     */
    protected void setValues (CoreDocumentImpl ownerDocument,
                            String namespaceURI, String qualifiedName,
                            String localName){

        // remove children first
        firstChild = null;
        previousSibling = null;
        nextSibling = null;
        fNodeListCache = null;

        // set owner document
        attributes = null;
        super.flags = 0;
        setOwnerDocument(ownerDocument);

        // synchronizeData will initialize attributes
        needsSyncData(true);
        super.name = qualifiedName;
        this.localName = localName;
        this.namespaceURI = namespaceURI;

    }

    //
    // Node methods
    //



    //
    //DOM2: Namespace methods.
    //

    /**
     * Introduced in DOM Level 2. <p>
     *
     * The namespace URI of this node, or null if it is unspecified.<p>
     *
     * This is not a computed value that is the result of a namespace lookup based on
     * an examination of the namespace declarations in scope. It is merely the
     * namespace URI given at creation time.<p>
     *
     * For nodes created with a DOM Level 1 method, such as createElement
     * from the Document interface, this is null.
     * @since WD-DOM-Level-2-19990923
     */
    public String getNamespaceURI()