src/java.xml/share/classes/com/sun/org/apache/xerces/internal/xni/NamespaceContext.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.xml/share/classes/com/sun/org/apache/xerces/internal/xni/NamespaceContext.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,180 @@
+/*
+ * reserved comment block
+ * DO NOT REMOVE OR ALTER!
+ */
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.xni;
+
+import java.util.Enumeration;
+import java.util.Vector;
+
+/**
+ * Represents an interface to query namespace information.
+ * <p>
+ * The prefix and namespace must be identical references for equal strings, thus
+ * each string should be internalized (@see String.intern())
+ * or added to the <code>SymbolTable</code>
+ *
+ * @see <a href="../../../../../xerces2/com/sun/org/apache/xerces/internal/util/SymbolTable.html">
+ * com.sun.org.apache.xerces.internal.util.SymbolTable</a>
+ *
+ * @author Andy Clark, IBM
+ *
+ */
+public interface NamespaceContext {
+
+ //
+ // Constants
+ //
+
+ /**
+ * The XML Namespace ("http://www.w3.org/XML/1998/namespace"). This is
+ * the Namespace URI that is automatically mapped to the "xml" prefix.
+ */
+ public final static String XML_URI = "http://www.w3.org/XML/1998/namespace".intern();
+
+ /**
+ * XML Information Set REC
+ * all namespace attributes (including those named xmlns,
+ * whose [prefix] property has no value) have a namespace URI of http://www.w3.org/2000/xmlns/
+ */
+ public final static String XMLNS_URI = "http://www.w3.org/2000/xmlns/".intern();
+
+ //
+ // NamespaceContext methods
+ //
+
+ /**
+ * Start a new Namespace context.
+ * <p>
+ * A new context should be pushed at the beginning
+ * of each XML element: the new context will automatically inherit
+ * the declarations of its parent context, but it will also keep
+ * track of which declarations were made within this context.
+ * <p>
+ *
+ * @see #popContext
+ */
+ public void pushContext();
+
+ /**
+ * Revert to the previous Namespace context.
+ * <p>
+ * The context should be popped at the end of each
+ * XML element. After popping the context, all Namespace prefix
+ * mappings that were previously in force are restored.
+ * <p>
+ * Users must not attempt to declare additional Namespace
+ * prefixes after popping a context, unless you push another
+ * context first.
+ *
+ * @see #pushContext
+ */
+ public void popContext();
+
+ /**
+ * Declare a Namespace prefix.
+ * <p>
+ * This method declares a prefix in the current Namespace
+ * context; the prefix will remain in force until this context
+ * is popped, unless it is shadowed in a descendant context.
+ * <p>
+ * Note that to declare a default Namespace, use the empty string.
+ * The prefixes "xml" and "xmlns" can't be rebound.
+ * <p>
+ * Note that you must <em>not</em> declare a prefix after
+ * you've pushed and popped another Namespace.
+ *
+ * @param prefix The prefix to declare, or null for the empty
+ * string.
+ * @param uri The Namespace URI to associate with the prefix.
+ *
+ * @return true if the prefix was legal, false otherwise
+ *
+ * @see #getURI
+ * @see #getDeclaredPrefixAt
+ */
+ public boolean declarePrefix(String prefix, String uri);
+
+
+ /**
+ * Look up a prefix and get the currently-mapped Namespace URI.
+ * <p>
+ * This method looks up the prefix in the current context. If no mapping
+ * is found, this methods will continue lookup in the parent context(s).
+ * Use the empty string ("") for the default Namespace.
+ *
+ * @param prefix The prefix to look up.
+ *
+ * @return The associated Namespace URI, or null if the prefix
+ * is undeclared in this context.
+ */
+ public String getURI(String prefix);
+
+ /**
+ * Look up a namespace URI and get one of the mapped prefix.
+ * <p>
+ * This method looks up the namespace URI in the current context.
+ * If more than one prefix is currently mapped to the same URI,
+ * this method will make an arbitrary selection
+ * If no mapping is found, this methods will continue lookup in the
+ * parent context(s).
+ *
+ * @param uri The namespace URI to look up.
+ *
+ * @return One of the associated prefixes, or null if the uri
+ * does not map to any prefix.
+ *
+ * @see #getPrefix
+ */
+ public String getPrefix(String uri);
+
+
+ /**
+ * Return a count of locally declared prefixes, including
+ * the default prefix if bound.
+ */
+ public int getDeclaredPrefixCount();
+
+ /**
+ * Returns the prefix at the specified index in the current context.
+ */
+ public String getDeclaredPrefixAt(int index);
+
+ /**
+ * Return an enumeration of all prefixes whose declarations are active
+ * in the current context. This includes declarations from parent contexts
+ * that have not been overridden.
+ * @return Enumeration
+ */
+ public Enumeration getAllPrefixes();
+
+ /**
+ * Reset this Namespace support object for reuse.
+ *
+ * <p>It is necessary to invoke this method before reusing the
+ * Namespace support object for a new session.</p>
+ *
+ * <p>Note that implementations of this method need to ensure that
+ * the declaration of the prefixes "xmlns" and "xml" are available.</p>
+ */
+ public void reset();
+
+
+} // interface NamespaceContext