1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/jaxws_classes/com/sun/xml/internal/txw2/NamespaceSupport.java Wed Apr 27 01:27:09 2016 +0800
1.3 @@ -0,0 +1,845 @@
1.4 +/*
1.5 + * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +// NamespaceSupport.java - generic Namespace support for SAX.
1.30 +// http://www.saxproject.org
1.31 +// Written by David Megginson
1.32 +// This class is in the Public Domain. NO WARRANTY!
1.33 +
1.34 +package com.sun.xml.internal.txw2;
1.35 +
1.36 +import java.util.EmptyStackException;
1.37 +import java.util.Enumeration;
1.38 +import java.util.Hashtable;
1.39 +import java.util.Vector;
1.40 +
1.41 +
1.42 +/**
1.43 + * Encapsulate Namespace logic for use by applications using SAX,
1.44 + * or internally by SAX drivers.
1.45 + *
1.46 + * <blockquote>
1.47 + * <em>This module, both source code and documentation, is in the
1.48 + * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
1.49 + * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
1.50 + * for further information.
1.51 + * </blockquote>
1.52 + *
1.53 + * <p>This class encapsulates the logic of Namespace processing: it
1.54 + * tracks the declarations currently in force for each context and
1.55 + * automatically processes qualified XML names into their Namespace
1.56 + * parts; it can also be used in reverse for generating XML qnames
1.57 + * from Namespaces.</p>
1.58 + *
1.59 + * <p>Namespace support objects are reusable, but the reset method
1.60 + * must be invoked between each session.</p>
1.61 + *
1.62 + * <p>Here is a simple session:</p>
1.63 + *
1.64 + * <pre>
1.65 + * String parts[] = new String[3];
1.66 + * NamespaceSupport support = new NamespaceSupport();
1.67 + *
1.68 + * support.pushContext();
1.69 + * support.declarePrefix("", "http://www.w3.org/1999/xhtml");
1.70 + * support.declarePrefix("dc", "http://www.purl.org/dc#");
1.71 + *
1.72 + * parts = support.processName("p", parts, false);
1.73 + * System.out.println("Namespace URI: " + parts[0]);
1.74 + * System.out.println("Local name: " + parts[1]);
1.75 + * System.out.println("Raw name: " + parts[2]);
1.76 + *
1.77 + * parts = support.processName("dc:title", parts, false);
1.78 + * System.out.println("Namespace URI: " + parts[0]);
1.79 + * System.out.println("Local name: " + parts[1]);
1.80 + * System.out.println("Raw name: " + parts[2]);
1.81 + *
1.82 + * support.popContext();
1.83 + * </pre>
1.84 + *
1.85 + * <p>Note that this class is optimized for the use case where most
1.86 + * elements do not contain Namespace declarations: if the same
1.87 + * prefix/URI mapping is repeated for each context (for example), this
1.88 + * class will be somewhat less efficient.</p>
1.89 + *
1.90 + * <p>Although SAX drivers (parsers) may choose to use this class to
1.91 + * implement namespace handling, they are not required to do so.
1.92 + * Applications must track namespace information themselves if they
1.93 + * want to use namespace information.
1.94 + *
1.95 + * @since SAX 2.0
1.96 + * @author David Megginson
1.97 + * @version 2.0.1 (sax2r2)
1.98 + */
1.99 +final class NamespaceSupport
1.100 +{
1.101 +
1.102 +
1.103 + ////////////////////////////////////////////////////////////////////
1.104 + // Constants.
1.105 + ////////////////////////////////////////////////////////////////////
1.106 +
1.107 +
1.108 + /**
1.109 + * The XML Namespace URI as a constant.
1.110 + * The value is <code>http://www.w3.org/XML/1998/namespace</code>
1.111 + * as defined in the "Namespaces in XML" * recommendation.
1.112 + *
1.113 + * <p>This is the Namespace URI that is automatically mapped
1.114 + * to the "xml" prefix.</p>
1.115 + */
1.116 + public final static String XMLNS =
1.117 + "http://www.w3.org/XML/1998/namespace";
1.118 +
1.119 +
1.120 + /**
1.121 + * The namespace declaration URI as a constant.
1.122 + * The value is <code>http://www.w3.org/xmlns/2000/</code>, as defined
1.123 + * in a backwards-incompatible erratum to the "Namespaces in XML"
1.124 + * recommendation. Because that erratum postdated SAX2, SAX2 defaults
1.125 + * to the original recommendation, and does not normally use this URI.
1.126 + *
1.127 + *
1.128 + * <p>This is the Namespace URI that is optionally applied to
1.129 + * <em>xmlns</em> and <em>xmlns:*</em> attributes, which are used to
1.130 + * declare namespaces. </p>
1.131 + *
1.132 + * @since SAX 2.1alpha
1.133 + * @see #setNamespaceDeclUris
1.134 + * @see #isNamespaceDeclUris
1.135 + */
1.136 + public final static String NSDECL =
1.137 + "http://www.w3.org/xmlns/2000/";
1.138 +
1.139 +
1.140 + /**
1.141 + * An empty enumeration.
1.142 + */
1.143 + private final static Enumeration EMPTY_ENUMERATION =
1.144 + new Vector().elements();
1.145 +
1.146 +
1.147 + ////////////////////////////////////////////////////////////////////
1.148 + // Constructor.
1.149 + ////////////////////////////////////////////////////////////////////
1.150 +
1.151 +
1.152 + /**
1.153 + * Create a new Namespace support object.
1.154 + */
1.155 + public NamespaceSupport ()
1.156 + {
1.157 + reset();
1.158 + }
1.159 +
1.160 +
1.161 +
1.162 + ////////////////////////////////////////////////////////////////////
1.163 + // Context management.
1.164 + ////////////////////////////////////////////////////////////////////
1.165 +
1.166 +
1.167 + /**
1.168 + * Reset this Namespace support object for reuse.
1.169 + *
1.170 + * <p>It is necessary to invoke this method before reusing the
1.171 + * Namespace support object for a new session. If namespace
1.172 + * declaration URIs are to be supported, that flag must also
1.173 + * be set to a non-default value.
1.174 + * </p>
1.175 + *
1.176 + * @see #setNamespaceDeclUris
1.177 + */
1.178 + public void reset ()
1.179 + {
1.180 + contexts = new Context[32];
1.181 + namespaceDeclUris = false;
1.182 + contextPos = 0;
1.183 + contexts[contextPos] = currentContext = new Context();
1.184 + currentContext.declarePrefix("xml", XMLNS);
1.185 + }
1.186 +
1.187 +
1.188 + /**
1.189 + * Start a new Namespace context.
1.190 + * The new context will automatically inherit
1.191 + * the declarations of its parent context, but it will also keep
1.192 + * track of which declarations were made within this context.
1.193 + *
1.194 + * <p>Event callback code should start a new context once per element.
1.195 + * This means being ready to call this in either of two places.
1.196 + * For elements that don't include namespace declarations, the
1.197 + * <em>ContentHandler.startElement()</em> callback is the right place.
1.198 + * For elements with such a declaration, it'd done in the first
1.199 + * <em>ContentHandler.startPrefixMapping()</em> callback.
1.200 + * A boolean flag can be used to
1.201 + * track whether a context has been started yet. When either of
1.202 + * those methods is called, it checks the flag to see if a new context
1.203 + * needs to be started. If so, it starts the context and sets the
1.204 + * flag. After <em>ContentHandler.startElement()</em>
1.205 + * does that, it always clears the flag.
1.206 + *
1.207 + * <p>Normally, SAX drivers would push a new context at the beginning
1.208 + * of each XML element. Then they perform a first pass over the
1.209 + * attributes to process all namespace declarations, making
1.210 + * <em>ContentHandler.startPrefixMapping()</em> callbacks.
1.211 + * Then a second pass is made, to determine the namespace-qualified
1.212 + * names for all attributes and for the element name.
1.213 + * Finally all the information for the
1.214 + * <em>ContentHandler.startElement()</em> callback is available,
1.215 + * so it can then be made.
1.216 + *
1.217 + * <p>The Namespace support object always starts with a base context
1.218 + * already in force: in this context, only the "xml" prefix is
1.219 + * declared.</p>
1.220 + *
1.221 + * @see org.xml.sax.ContentHandler
1.222 + * @see #popContext
1.223 + */
1.224 + public void pushContext ()
1.225 + {
1.226 + int max = contexts.length;
1.227 +
1.228 + contextPos++;
1.229 +
1.230 + // Extend the array if necessary
1.231 + if (contextPos >= max) {
1.232 + Context newContexts[] = new Context[max*2];
1.233 + System.arraycopy(contexts, 0, newContexts, 0, max);
1.234 + max *= 2;
1.235 + contexts = newContexts;
1.236 + }
1.237 +
1.238 + // Allocate the context if necessary.
1.239 + currentContext = contexts[contextPos];
1.240 + if (currentContext == null) {
1.241 + contexts[contextPos] = currentContext = new Context();
1.242 + }
1.243 +
1.244 + // Set the parent, if any.
1.245 + if (contextPos > 0) {
1.246 + currentContext.setParent(contexts[contextPos - 1]);
1.247 + }
1.248 + }
1.249 +
1.250 +
1.251 + /**
1.252 + * Revert to the previous Namespace context.
1.253 + *
1.254 + * <p>Normally, you should pop the context at the end of each
1.255 + * XML element. After popping the context, all Namespace prefix
1.256 + * mappings that were previously in force are restored.</p>
1.257 + *
1.258 + * <p>You must not attempt to declare additional Namespace
1.259 + * prefixes after popping a context, unless you push another
1.260 + * context first.</p>
1.261 + *
1.262 + * @see #pushContext
1.263 + */
1.264 + public void popContext ()
1.265 + {
1.266 + contexts[contextPos].clear();
1.267 + contextPos--;
1.268 + if (contextPos < 0) {
1.269 + throw new EmptyStackException();
1.270 + }
1.271 + currentContext = contexts[contextPos];
1.272 + }
1.273 +
1.274 +
1.275 +
1.276 + ////////////////////////////////////////////////////////////////////
1.277 + // Operations within a context.
1.278 + ////////////////////////////////////////////////////////////////////
1.279 +
1.280 +
1.281 + /**
1.282 + * Declare a Namespace prefix. All prefixes must be declared
1.283 + * before they are referenced. For example, a SAX driver (parser)
1.284 + * would scan an element's attributes
1.285 + * in two passes: first for namespace declarations,
1.286 + * then a second pass using {@link #processName processName()} to
1.287 + * interpret prefixes against (potentially redefined) prefixes.
1.288 + *
1.289 + * <p>This method declares a prefix in the current Namespace
1.290 + * context; the prefix will remain in force until this context
1.291 + * is popped, unless it is shadowed in a descendant context.</p>
1.292 + *
1.293 + * <p>To declare the default element Namespace, use the empty string as
1.294 + * the prefix.</p>
1.295 + *
1.296 + * <p>Note that there is an asymmetry in this library: {@link
1.297 + * #getPrefix getPrefix} will not return the "" prefix,
1.298 + * even if you have declared a default element namespace.
1.299 + * To check for a default namespace,
1.300 + * you have to look it up explicitly using {@link #getURI getURI}.
1.301 + * This asymmetry exists to make it easier to look up prefixes
1.302 + * for attribute names, where the default prefix is not allowed.</p>
1.303 + *
1.304 + * @param prefix The prefix to declare, or the empty string to
1.305 + * indicate the default element namespace. This may never have
1.306 + * the value "xml" or "xmlns".
1.307 + * @param uri The Namespace URI to associate with the prefix.
1.308 + * @return true if the prefix was legal, false otherwise
1.309 + *
1.310 + * @see #processName
1.311 + * @see #getURI
1.312 + * @see #getPrefix
1.313 + */
1.314 + public boolean declarePrefix (String prefix, String uri)
1.315 + {
1.316 + if (prefix.equals("xml") || prefix.equals("xmlns")) {
1.317 + return false;
1.318 + } else {
1.319 + currentContext.declarePrefix(prefix, uri);
1.320 + return true;
1.321 + }
1.322 + }
1.323 +
1.324 +
1.325 + /**
1.326 + * Process a raw XML qualified name, after all declarations in the
1.327 + * current context have been handled by {@link #declarePrefix
1.328 + * declarePrefix()}.
1.329 + *
1.330 + * <p>This method processes a raw XML qualified name in the
1.331 + * current context by removing the prefix and looking it up among
1.332 + * the prefixes currently declared. The return value will be the
1.333 + * array supplied by the caller, filled in as follows:</p>
1.334 + *
1.335 + * <dl>
1.336 + * <dt>parts[0]</dt>
1.337 + * <dd>The Namespace URI, or an empty string if none is
1.338 + * in use.</dd>
1.339 + * <dt>parts[1]</dt>
1.340 + * <dd>The local name (without prefix).</dd>
1.341 + * <dt>parts[2]</dt>
1.342 + * <dd>The original raw name.</dd>
1.343 + * </dl>
1.344 + *
1.345 + * <p>All of the strings in the array will be internalized. If
1.346 + * the raw name has a prefix that has not been declared, then
1.347 + * the return value will be null.</p>
1.348 + *
1.349 + * <p>Note that attribute names are processed differently than
1.350 + * element names: an unprefixed element name will receive the
1.351 + * default Namespace (if any), while an unprefixed attribute name
1.352 + * will not.</p>
1.353 + *
1.354 + * @param qName The XML qualified name to be processed.
1.355 + * @param parts An array supplied by the caller, capable of
1.356 + * holding at least three members.
1.357 + * @param isAttribute A flag indicating whether this is an
1.358 + * attribute name (true) or an element name (false).
1.359 + * @return The supplied array holding three internalized strings
1.360 + * representing the Namespace URI (or empty string), the
1.361 + * local name, and the XML qualified name; or null if there
1.362 + * is an undeclared prefix.
1.363 + * @see #declarePrefix
1.364 + * @see java.lang.String#intern */
1.365 + public String [] processName (String qName, String parts[],
1.366 + boolean isAttribute)
1.367 + {
1.368 + String myParts[] = currentContext.processName(qName, isAttribute);
1.369 + if (myParts == null) {
1.370 + return null;
1.371 + } else {
1.372 + parts[0] = myParts[0];
1.373 + parts[1] = myParts[1];
1.374 + parts[2] = myParts[2];
1.375 + return parts;
1.376 + }
1.377 + }
1.378 +
1.379 +
1.380 + /**
1.381 + * Look up a prefix and get the currently-mapped Namespace URI.
1.382 + *
1.383 + * <p>This method looks up the prefix in the current context.
1.384 + * Use the empty string ("") for the default Namespace.</p>
1.385 + *
1.386 + * @param prefix The prefix to look up.
1.387 + * @return The associated Namespace URI, or null if the prefix
1.388 + * is undeclared in this context.
1.389 + * @see #getPrefix
1.390 + * @see #getPrefixes
1.391 + */
1.392 + public String getURI (String prefix)
1.393 + {
1.394 + return currentContext.getURI(prefix);
1.395 + }
1.396 +
1.397 +
1.398 + /**
1.399 + * Return an enumeration of all prefixes whose declarations are
1.400 + * active in the current context.
1.401 + * This includes declarations from parent contexts that have
1.402 + * not been overridden.
1.403 + *
1.404 + * <p><strong>Note:</strong> if there is a default prefix, it will not be
1.405 + * returned in this enumeration; check for the default prefix
1.406 + * using the {@link #getURI getURI} with an argument of "".</p>
1.407 + *
1.408 + * @return An enumeration of prefixes (never empty).
1.409 + * @see #getDeclaredPrefixes
1.410 + * @see #getURI
1.411 + */
1.412 + public Enumeration getPrefixes ()
1.413 + {
1.414 + return currentContext.getPrefixes();
1.415 + }
1.416 +
1.417 +
1.418 + /**
1.419 + * Return one of the prefixes mapped to a Namespace URI.
1.420 + *
1.421 + * <p>If more than one prefix is currently mapped to the same
1.422 + * URI, this method will make an arbitrary selection; if you
1.423 + * want all of the prefixes, use the {@link #getPrefixes}
1.424 + * method instead.</p>
1.425 + *
1.426 + * <p><strong>Note:</strong> this will never return the empty (default) prefix;
1.427 + * to check for a default prefix, use the {@link #getURI getURI}
1.428 + * method with an argument of "".</p>
1.429 + *
1.430 + * @param uri the namespace URI
1.431 + * @return one of the prefixes currently mapped to the URI supplied,
1.432 + * or null if none is mapped or if the URI is assigned to
1.433 + * the default namespace
1.434 + * @see #getPrefixes(java.lang.String)
1.435 + * @see #getURI
1.436 + */
1.437 + public String getPrefix (String uri)
1.438 + {
1.439 + return currentContext.getPrefix(uri);
1.440 + }
1.441 +
1.442 +
1.443 + /**
1.444 + * Return an enumeration of all prefixes for a given URI whose
1.445 + * declarations are active in the current context.
1.446 + * This includes declarations from parent contexts that have
1.447 + * not been overridden.
1.448 + *
1.449 + * <p>This method returns prefixes mapped to a specific Namespace
1.450 + * URI. The xml: prefix will be included. If you want only one
1.451 + * prefix that's mapped to the Namespace URI, and you don't care
1.452 + * which one you get, use the {@link #getPrefix getPrefix}
1.453 + * method instead.</p>
1.454 + *
1.455 + * <p><strong>Note:</strong> the empty (default) prefix is <em>never</em> included
1.456 + * in this enumeration; to check for the presence of a default
1.457 + * Namespace, use the {@link #getURI getURI} method with an
1.458 + * argument of "".</p>
1.459 + *
1.460 + * @param uri The Namespace URI.
1.461 + * @return An enumeration of prefixes (never empty).
1.462 + * @see #getPrefix
1.463 + * @see #getDeclaredPrefixes
1.464 + * @see #getURI
1.465 + */
1.466 + public Enumeration getPrefixes (String uri)
1.467 + {
1.468 + Vector prefixes = new Vector();
1.469 + Enumeration allPrefixes = getPrefixes();
1.470 + while (allPrefixes.hasMoreElements()) {
1.471 + String prefix = (String)allPrefixes.nextElement();
1.472 + if (uri.equals(getURI(prefix))) {
1.473 + prefixes.addElement(prefix);
1.474 + }
1.475 + }
1.476 + return prefixes.elements();
1.477 + }
1.478 +
1.479 +
1.480 + /**
1.481 + * Return an enumeration of all prefixes declared in this context.
1.482 + *
1.483 + * <p>The empty (default) prefix will be included in this
1.484 + * enumeration; note that this behaviour differs from that of
1.485 + * {@link #getPrefix} and {@link #getPrefixes}.</p>
1.486 + *
1.487 + * @return An enumeration of all prefixes declared in this
1.488 + * context.
1.489 + * @see #getPrefixes
1.490 + * @see #getURI
1.491 + */
1.492 + public Enumeration getDeclaredPrefixes ()
1.493 + {
1.494 + return currentContext.getDeclaredPrefixes();
1.495 + }
1.496 +
1.497 + /**
1.498 + * Controls whether namespace declaration attributes are placed
1.499 + * into the {@link #NSDECL NSDECL} namespace
1.500 + * by {@link #processName processName()}. This may only be
1.501 + * changed before any contexts have been pushed.
1.502 + *
1.503 + * @since SAX 2.1alpha
1.504 + *
1.505 + * @exception IllegalStateException when attempting to set this
1.506 + * after any context has been pushed.
1.507 + */
1.508 + public void setNamespaceDeclUris (boolean value)
1.509 + {
1.510 + if (contextPos != 0)
1.511 + throw new IllegalStateException ();
1.512 + if (value == namespaceDeclUris)
1.513 + return;
1.514 + namespaceDeclUris = value;
1.515 + if (value)
1.516 + currentContext.declarePrefix ("xmlns", NSDECL);
1.517 + else {
1.518 + contexts[contextPos] = currentContext = new Context();
1.519 + currentContext.declarePrefix("xml", XMLNS);
1.520 + }
1.521 + }
1.522 +
1.523 + /**
1.524 + * Returns true if namespace declaration attributes are placed into
1.525 + * a namespace. This behavior is not the default.
1.526 + *
1.527 + * @since SAX 2.1alpha
1.528 + */
1.529 + public boolean isNamespaceDeclUris ()
1.530 + { return namespaceDeclUris; }
1.531 +
1.532 +
1.533 +
1.534 + ////////////////////////////////////////////////////////////////////
1.535 + // Internal state.
1.536 + ////////////////////////////////////////////////////////////////////
1.537 +
1.538 + private Context contexts[];
1.539 + private Context currentContext;
1.540 + private int contextPos;
1.541 + private boolean namespaceDeclUris;
1.542 +
1.543 +
1.544 + ////////////////////////////////////////////////////////////////////
1.545 + // Internal classes.
1.546 + ////////////////////////////////////////////////////////////////////
1.547 +
1.548 + /**
1.549 + * Internal class for a single Namespace context.
1.550 + *
1.551 + * <p>This module caches and reuses Namespace contexts,
1.552 + * so the number allocated
1.553 + * will be equal to the element depth of the document, not to the total
1.554 + * number of elements (i.e. 5-10 rather than tens of thousands).
1.555 + * Also, data structures used to represent contexts are shared when
1.556 + * possible (child contexts without declarations) to further reduce
1.557 + * the amount of memory that's consumed.
1.558 + * </p>
1.559 + */
1.560 + final class Context {
1.561 +
1.562 + /**
1.563 + * Create the root-level Namespace context.
1.564 + */
1.565 + Context ()
1.566 + {
1.567 + copyTables();
1.568 + }
1.569 +
1.570 +
1.571 + /**
1.572 + * (Re)set the parent of this Namespace context.
1.573 + * The context must either have been freshly constructed,
1.574 + * or must have been cleared.
1.575 + *
1.576 + * @param context The parent Namespace context object.
1.577 + */
1.578 + void setParent (Context parent)
1.579 + {
1.580 + this.parent = parent;
1.581 + declarations = null;
1.582 + prefixTable = parent.prefixTable;
1.583 + uriTable = parent.uriTable;
1.584 + elementNameTable = parent.elementNameTable;
1.585 + attributeNameTable = parent.attributeNameTable;
1.586 + defaultNS = parent.defaultNS;
1.587 + declSeen = false;
1.588 + }
1.589 +
1.590 + /**
1.591 + * Makes associated state become collectible,
1.592 + * invalidating this context.
1.593 + * {@link #setParent} must be called before
1.594 + * this context may be used again.
1.595 + */
1.596 + void clear ()
1.597 + {
1.598 + parent = null;
1.599 + prefixTable = null;
1.600 + uriTable = null;
1.601 + elementNameTable = null;
1.602 + attributeNameTable = null;
1.603 + defaultNS = "";
1.604 + }
1.605 +
1.606 +
1.607 + /**
1.608 + * Declare a Namespace prefix for this context.
1.609 + *
1.610 + * @param prefix The prefix to declare.
1.611 + * @param uri The associated Namespace URI.
1.612 + * @see org.xml.sax.helpers.NamespaceSupport#declarePrefix
1.613 + */
1.614 + void declarePrefix (String prefix, String uri)
1.615 + {
1.616 + // Lazy processing...
1.617 +// if (!declsOK)
1.618 +// throw new IllegalStateException (
1.619 +// "can't declare any more prefixes in this context");
1.620 + if (!declSeen) {
1.621 + copyTables();
1.622 + }
1.623 + if (declarations == null) {
1.624 + declarations = new Vector();
1.625 + }
1.626 +
1.627 + prefix = prefix.intern();
1.628 + uri = uri.intern();
1.629 + if ("".equals(prefix)) {
1.630 + defaultNS = uri;
1.631 + } else {
1.632 + prefixTable.put(prefix, uri);
1.633 + uriTable.put(uri, prefix); // may wipe out another prefix
1.634 + }
1.635 + declarations.addElement(prefix);
1.636 + }
1.637 +
1.638 +
1.639 + /**
1.640 + * Process an XML qualified name in this context.
1.641 + *
1.642 + * @param qName The XML qualified name.
1.643 + * @param isAttribute true if this is an attribute name.
1.644 + * @return An array of three strings containing the
1.645 + * URI part (or empty string), the local part,
1.646 + * and the raw name, all internalized, or null
1.647 + * if there is an undeclared prefix.
1.648 + * @see org.xml.sax.helpers.NamespaceSupport#processName
1.649 + */
1.650 + String [] processName (String qName, boolean isAttribute)
1.651 + {
1.652 + String name[];
1.653 + Hashtable table;
1.654 +
1.655 + // Select the appropriate table.
1.656 + if (isAttribute) {
1.657 + table = attributeNameTable;
1.658 + } else {
1.659 + table = elementNameTable;
1.660 + }
1.661 +
1.662 + // Start by looking in the cache, and
1.663 + // return immediately if the name
1.664 + // is already known in this content
1.665 + name = (String[])table.get(qName);
1.666 + if (name != null) {
1.667 + return name;
1.668 + }
1.669 +
1.670 + // We haven't seen this name in this
1.671 + // context before. Maybe in the parent
1.672 + // context, but we can't assume prefix
1.673 + // bindings are the same.
1.674 + name = new String[3];
1.675 + name[2] = qName.intern();
1.676 + int index = qName.indexOf(':');
1.677 +
1.678 +
1.679 + // No prefix.
1.680 + if (index == -1) {
1.681 + if (isAttribute) {
1.682 + if (qName == "xmlns" && namespaceDeclUris)
1.683 + name[0] = NSDECL;
1.684 + else
1.685 + name[0] = "";
1.686 + } else {
1.687 + name[0] = defaultNS;
1.688 + }
1.689 + name[1] = name[2];
1.690 + }
1.691 +
1.692 + // Prefix
1.693 + else {
1.694 + String prefix = qName.substring(0, index);
1.695 + String local = qName.substring(index+1);
1.696 + String uri;
1.697 + if ("".equals(prefix)) {
1.698 + uri = defaultNS;
1.699 + } else {
1.700 + uri = (String)prefixTable.get(prefix);
1.701 + }
1.702 + if (uri == null
1.703 + || (!isAttribute && "xmlns".equals (prefix))) {
1.704 + return null;
1.705 + }
1.706 + name[0] = uri;
1.707 + name[1] = local.intern();
1.708 + }
1.709 +
1.710 + // Save in the cache for future use.
1.711 + // (Could be shared with parent context...)
1.712 + table.put(name[2], name);
1.713 + return name;
1.714 + }
1.715 +
1.716 +
1.717 + /**
1.718 + * Look up the URI associated with a prefix in this context.
1.719 + *
1.720 + * @param prefix The prefix to look up.
1.721 + * @return The associated Namespace URI, or null if none is
1.722 + * declared.
1.723 + * @see org.xml.sax.helpers.NamespaceSupport#getURI
1.724 + */
1.725 + String getURI (String prefix)
1.726 + {
1.727 + if ("".equals(prefix)) {
1.728 + return defaultNS;
1.729 + } else if (prefixTable == null) {
1.730 + return null;
1.731 + } else {
1.732 + return (String)prefixTable.get(prefix);
1.733 + }
1.734 + }
1.735 +
1.736 +
1.737 + /**
1.738 + * Look up one of the prefixes associated with a URI in this context.
1.739 + *
1.740 + * <p>Since many prefixes may be mapped to the same URI,
1.741 + * the return value may be unreliable.</p>
1.742 + *
1.743 + * @param uri The URI to look up.
1.744 + * @return The associated prefix, or null if none is declared.
1.745 + * @see org.xml.sax.helpers.NamespaceSupport#getPrefix
1.746 + */
1.747 + String getPrefix (String uri) {
1.748 + if (uriTable != null) {
1.749 + String uriPrefix = (String)uriTable.get(uri);
1.750 + if (uriPrefix == null) return null;
1.751 + String verifyNamespace = (String) prefixTable.get(uriPrefix);
1.752 + if (uri.equals(verifyNamespace)) {
1.753 + return uriPrefix;
1.754 + }
1.755 + }
1.756 + return null;
1.757 + }
1.758 +
1.759 +
1.760 + /**
1.761 + * Return an enumeration of prefixes declared in this context.
1.762 + *
1.763 + * @return An enumeration of prefixes (possibly empty).
1.764 + * @see org.xml.sax.helpers.NamespaceSupport#getDeclaredPrefixes
1.765 + */
1.766 + Enumeration getDeclaredPrefixes ()
1.767 + {
1.768 + if (declarations == null) {
1.769 + return EMPTY_ENUMERATION;
1.770 + } else {
1.771 + return declarations.elements();
1.772 + }
1.773 + }
1.774 +
1.775 +
1.776 + /**
1.777 + * Return an enumeration of all prefixes currently in force.
1.778 + *
1.779 + * <p>The default prefix, if in force, is <em>not</em>
1.780 + * returned, and will have to be checked for separately.</p>
1.781 + *
1.782 + * @return An enumeration of prefixes (never empty).
1.783 + * @see org.xml.sax.helpers.NamespaceSupport#getPrefixes
1.784 + */
1.785 + Enumeration getPrefixes ()
1.786 + {
1.787 + if (prefixTable == null) {
1.788 + return EMPTY_ENUMERATION;
1.789 + } else {
1.790 + return prefixTable.keys();
1.791 + }
1.792 + }
1.793 +
1.794 +
1.795 +
1.796 + ////////////////////////////////////////////////////////////////
1.797 + // Internal methods.
1.798 + ////////////////////////////////////////////////////////////////
1.799 +
1.800 +
1.801 + /**
1.802 + * Copy on write for the internal tables in this context.
1.803 + *
1.804 + * <p>This class is optimized for the normal case where most
1.805 + * elements do not contain Namespace declarations.</p>
1.806 + */
1.807 + private void copyTables ()
1.808 + {
1.809 + if (prefixTable != null) {
1.810 + prefixTable = (Hashtable)prefixTable.clone();
1.811 + } else {
1.812 + prefixTable = new Hashtable();
1.813 + }
1.814 + if (uriTable != null) {
1.815 + uriTable = (Hashtable)uriTable.clone();
1.816 + } else {
1.817 + uriTable = new Hashtable();
1.818 + }
1.819 + elementNameTable = new Hashtable();
1.820 + attributeNameTable = new Hashtable();
1.821 + declSeen = true;
1.822 + }
1.823 +
1.824 +
1.825 +
1.826 + ////////////////////////////////////////////////////////////////
1.827 + // Protected state.
1.828 + ////////////////////////////////////////////////////////////////
1.829 +
1.830 + Hashtable prefixTable;
1.831 + Hashtable uriTable;
1.832 + Hashtable elementNameTable;
1.833 + Hashtable attributeNameTable;
1.834 + String defaultNS = "";
1.835 +
1.836 +
1.837 +
1.838 + ////////////////////////////////////////////////////////////////
1.839 + // Internal state.
1.840 + ////////////////////////////////////////////////////////////////
1.841 +
1.842 + private Vector declarations = null;
1.843 + private boolean declSeen = false;
1.844 + private Context parent = null;
1.845 + }
1.846 +}
1.847 +
1.848 +// end of NamespaceSupport.java
