jaxp/src/java.xml/share/classes/javax/xml/namespace/NamespaceContext.java
changeset 25868 686eef1e7a79
parent 12457 c348e06f0e82
child 29999 8493f5fc1052
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jaxp/src/java.xml/share/classes/javax/xml/namespace/NamespaceContext.java	Sun Aug 17 15:51:56 2014 +0100
@@ -0,0 +1,288 @@
+/*
+ * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package javax.xml.namespace;
+
+import java.util.Iterator;
+
+/**
+ * <p>Interface for read only XML Namespace context processing.</p>
+ *
+ * <p>An XML Namespace has the properties:</p>
+ * <ul>
+ *   <li>Namespace URI:
+ *       Namespace name expressed as a URI to which the prefix is bound</li>
+ *   <li>prefix: syntactically, this is the part of the attribute name
+ *       following the <code>XMLConstants.XMLNS_ATTRIBUTE</code>
+ *       ("xmlns") in the Namespace declaration</li>
+ * </ul>
+ * <p>example:
+ * <code>&lt;element xmlns:prefix="http://Namespace-name-URI"&gt;</code></p>
+ *
+ * <p>All <code>get*(*)</code> methods operate in the current scope
+ * for Namespace URI and prefix resolution.</p>
+ *
+ * <p>Note that a Namespace URI can be bound to
+ * <strong>multiple</strong> prefixes in the current scope.  This can
+ * occur when multiple <code>XMLConstants.XMLNS_ATTRIBUTE</code>
+ * ("xmlns") Namespace declarations occur in the same Start-Tag and
+ * refer to the same Namespace URI. e.g.<br />
+ * <pre>
+ * &lt;element xmlns:prefix1="http://Namespace-name-URI"
+ *          xmlns:prefix2="http://Namespace-name-URI"&gt;
+ * </pre>
+ * This can also occur when the same Namespace URI is used in multiple
+ * <code>XMLConstants.XMLNS_ATTRIBUTE</code> ("xmlns") Namespace
+ * declarations in the logical parent element hierarchy.  e.g.<br />
+ * <pre>
+ * &lt;parent xmlns:prefix1="http://Namespace-name-URI">
+ *   &lt;child xmlns:prefix2="http://Namespace-name-URI"&gt;
+ *     ...
+ *   &lt;/child&gt;
+ * &lt;/parent&gt;
+ * </pre></p>
+ *
+ * <p>A prefix can only be bound to a <strong>single</strong>
+ * Namespace URI in the current scope.</p>
+ *
+ * @author <a href="mailto:Jeff.Suttor@Sun.com">Jeff Suttor</a>
+ * @see javax.xml.XMLConstants
+ *   javax.xml.XMLConstants for declarations of common XML values
+ * @see <a href="http://www.w3.org/TR/xmlschema-2/#QName">
+ *   XML Schema Part2: Datatypes</a>
+ * @see <a href="http://www.w3.org/TR/REC-xml-names/#ns-qualnames">
+ *   Namespaces in XML</a>
+ * @see <a href="http://www.w3.org/XML/xml-names-19990114-errata">
+ *   Namespaces in XML Errata</a>
+ * @since 1.5
+ */
+
+public interface NamespaceContext {
+
+    /**
+     * <p>Get Namespace URI bound to a prefix in the current scope.</p>
+     *
+     * <p>When requesting a Namespace URI by prefix, the following
+     * table describes the returned Namespace URI value for all
+     * possible prefix values:</p>
+     *
+     * <table border="2" rules="all" cellpadding="4">
+     *   <thead>
+     *     <tr>
+     *       <td align="center" colspan="2">
+     *         <code>getNamespaceURI(prefix)</code>
+     *         return value for specified prefixes
+     *       </td>
+     *     </tr>
+     *     <tr>
+     *       <td>prefix parameter</td>
+     *       <td>Namespace URI return value</td>
+     *     </tr>
+     *   </thead>
+     *   <tbody>
+     *     <tr>
+     *       <td><code>DEFAULT_NS_PREFIX</code> ("")</td>
+     *       <td>default Namespace URI in the current scope or
+     *         <code>{@link
+     *         javax.xml.XMLConstants#NULL_NS_URI XMLConstants.NULL_NS_URI("")}
+     *         </code>
+     *         when there is no default Namespace URI in the current scope</td>
+     *     </tr>
+     *     <tr>
+     *       <td>bound prefix</td>
+     *       <td>Namespace URI bound to prefix in current scope</td>
+     *     </tr>
+     *     <tr>
+     *       <td>unbound prefix</td>
+     *       <td>
+     *         <code>{@link
+     *         javax.xml.XMLConstants#NULL_NS_URI XMLConstants.NULL_NS_URI("")}
+     *         </code>
+     *       </td>
+     *     </tr>
+     *     <tr>
+     *       <td><code>XMLConstants.XML_NS_PREFIX</code> ("xml")</td>
+     *       <td><code>XMLConstants.XML_NS_URI</code>
+     *           ("http://www.w3.org/XML/1998/namespace")</td>
+     *     </tr>
+     *     <tr>
+     *       <td><code>XMLConstants.XMLNS_ATTRIBUTE</code> ("xmlns")</td>
+     *       <td><code>XMLConstants.XMLNS_ATTRIBUTE_NS_URI</code>
+     *         ("http://www.w3.org/2000/xmlns/")</td>
+     *     </tr>
+     *     <tr>
+     *       <td><code>null</code></td>
+     *       <td><code>IllegalArgumentException</code> is thrown</td>
+     *     </tr>
+     *    </tbody>
+     * </table>
+     *
+     * @param prefix prefix to look up
+     *
+     * @return Namespace URI bound to prefix in the current scope
+     *
+     * @throws IllegalArgumentException When <code>prefix</code> is
+     *   <code>null</code>
+     */
+    String getNamespaceURI(String prefix);
+
+    /**
+     * <p>Get prefix bound to Namespace URI in the current scope.</p>
+     *
+     * <p>To get all prefixes bound to a Namespace URI in the current
+     * scope, use {@link #getPrefixes(String namespaceURI)}.</p>
+     *
+     * <p>When requesting a prefix by Namespace URI, the following
+     * table describes the returned prefix value for all Namespace URI
+     * values:</p>
+     *
+     * <table border="2" rules="all" cellpadding="4">
+     *   <thead>
+     *     <tr>
+     *       <th align="center" colspan="2">
+     *         <code>getPrefix(namespaceURI)</code> return value for
+     *         specified Namespace URIs
+     *       </th>
+     *     </tr>
+     *     <tr>
+     *       <th>Namespace URI parameter</th>
+     *       <th>prefix value returned</th>
+     *     </tr>
+     *   </thead>
+     *   <tbody>
+     *     <tr>
+     *       <td>&lt;default Namespace URI&gt;</td>
+     *       <td><code>XMLConstants.DEFAULT_NS_PREFIX</code> ("")
+     *       </td>
+     *     </tr>
+     *     <tr>
+     *       <td>bound Namespace URI</td>
+     *       <td>prefix bound to Namespace URI in the current scope,
+     *           if multiple prefixes are bound to the Namespace URI in
+     *           the current scope, a single arbitrary prefix, whose
+     *           choice is implementation dependent, is returned</td>
+     *     </tr>
+     *     <tr>
+     *       <td>unbound Namespace URI</td>
+     *       <td><code>null</code></td>
+     *     </tr>
+     *     <tr>
+     *       <td><code>XMLConstants.XML_NS_URI</code>
+     *           ("http://www.w3.org/XML/1998/namespace")</td>
+     *       <td><code>XMLConstants.XML_NS_PREFIX</code> ("xml")</td>
+     *     </tr>
+     *     <tr>
+     *       <td><code>XMLConstants.XMLNS_ATTRIBUTE_NS_URI</code>
+     *           ("http://www.w3.org/2000/xmlns/")</td>
+     *       <td><code>XMLConstants.XMLNS_ATTRIBUTE</code> ("xmlns")</td>
+     *     </tr>
+     *     <tr>
+     *       <td><code>null</code></td>
+     *       <td><code>IllegalArgumentException</code> is thrown</td>
+     *     </tr>
+     *   </tbody>
+     * </table>
+     *
+     * @param namespaceURI URI of Namespace to lookup
+     *
+     * @return prefix bound to Namespace URI in current context
+     *
+     * @throws IllegalArgumentException When <code>namespaceURI</code> is
+     *   <code>null</code>
+     */
+    String getPrefix(String namespaceURI);
+
+    /**
+     * <p>Get all prefixes bound to a Namespace URI in the current
+     * scope.</p>
+     *
+     * <p>An Iterator over String elements is returned in an arbitrary,
+     * <strong>implementation dependent</strong>, order.</p>
+     *
+     * <p><strong>The <code>Iterator</code> is
+     * <em>not</em> modifiable.  e.g. the
+     * <code>remove()</code> method will throw
+     * <code>UnsupportedOperationException</code>.</strong></p>
+     *
+     * <p>When requesting prefixes by Namespace URI, the following
+     * table describes the returned prefixes value for all Namespace
+     * URI values:</p>
+     *
+     * <table border="2" rules="all" cellpadding="4">
+     *   <thead>
+     *     <tr>
+     *       <th align="center" colspan="2"><code>
+     *         getPrefixes(namespaceURI)</code> return value for
+     *         specified Namespace URIs</th>
+     *     </tr>
+     *     <tr>
+     *       <th>Namespace URI parameter</th>
+     *       <th>prefixes value returned</th>
+     *     </tr>
+     *   </thead>
+     *   <tbody>
+     *     <tr>
+     *       <td>bound Namespace URI,
+     *         including the &lt;default Namespace URI&gt;</td>
+     *       <td>
+     *         <code>Iterator</code> over prefixes bound to Namespace URI in
+     *         the current scope in an arbitrary,
+     *         <strong>implementation dependent</strong>,
+     *         order
+     *       </td>
+     *     </tr>
+     *     <tr>
+     *       <td>unbound Namespace URI</td>
+     *       <td>empty <code>Iterator</code></td>
+     *     </tr>
+     *     <tr>
+     *       <td><code>XMLConstants.XML_NS_URI</code>
+     *           ("http://www.w3.org/XML/1998/namespace")</td>
+     *       <td><code>Iterator</code> with one element set to
+     *         <code>XMLConstants.XML_NS_PREFIX</code> ("xml")</td>
+     *     </tr>
+     *     <tr>
+     *       <td><code>XMLConstants.XMLNS_ATTRIBUTE_NS_URI</code>
+     *           ("http://www.w3.org/2000/xmlns/")</td>
+     *       <td><code>Iterator</code> with one element set to
+     *         <code>XMLConstants.XMLNS_ATTRIBUTE</code> ("xmlns")</td>
+     *     </tr>
+     *     <tr>
+     *       <td><code>null</code></td>
+     *       <td><code>IllegalArgumentException</code> is thrown</td>
+     *     </tr>
+     *   </tbody>
+     * </table>
+     *
+     * @param namespaceURI URI of Namespace to lookup
+     *
+     * @return <code>Iterator</code> for all prefixes bound to the
+     *   Namespace URI in the current scope
+     *
+     * @throws IllegalArgumentException When <code>namespaceURI</code> is
+     *   <code>null</code>
+     */
+    Iterator getPrefixes(String namespaceURI);
+}