1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/jaxws_classes/com/sun/xml/internal/txw2/StartTag.java Wed Apr 27 01:27:09 2016 +0800
1.3 @@ -0,0 +1,248 @@
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 +package com.sun.xml.internal.txw2;
1.30 +
1.31 +import javax.xml.namespace.QName;
1.32 +
1.33 +
1.34 +/**
1.35 + * Start tag.
1.36 + *
1.37 + * <p>
1.38 + * This object implements {@link NamespaceResolver} for attribute values.
1.39 + *
1.40 + * @author Kohsuke Kawaguchi
1.41 + */
1.42 +class StartTag extends Content implements NamespaceResolver {
1.43 + /**
1.44 + * Tag name of the element.
1.45 + *
1.46 + * <p>
1.47 + * This field is also used as a flag to indicate
1.48 + * whether the start tag has been written.
1.49 + * This field is initially set to non-null, and
1.50 + * then reset to null when it's written.
1.51 + */
1.52 + private String uri;
1.53 + // but we keep the local name non-null so that
1.54 + // we can diagnose an error
1.55 + private final String localName;
1.56 +
1.57 + private Attribute firstAtt;
1.58 + private Attribute lastAtt;
1.59 +
1.60 + /**
1.61 + * If this {@link StartTag} has the parent {@link ContainerElement},
1.62 + * that value. Otherwise null.
1.63 + */
1.64 + private ContainerElement owner;
1.65 +
1.66 + /**
1.67 + * Explicitly given namespace declarations on this element.
1.68 + *
1.69 + * <p>
1.70 + * Additional namespace declarations might be necessary to
1.71 + * generate child {@link QName}s and attributes.
1.72 + */
1.73 + private NamespaceDecl firstNs;
1.74 + private NamespaceDecl lastNs;
1.75 +
1.76 + final Document document;
1.77 +
1.78 + public StartTag(ContainerElement owner, String uri, String localName) {
1.79 + this(owner.document,uri,localName);
1.80 + this.owner = owner;
1.81 + }
1.82 +
1.83 + public StartTag(Document document, String uri, String localName) {
1.84 + assert uri!=null;
1.85 + assert localName!=null;
1.86 +
1.87 + this.uri = uri;
1.88 + this.localName = localName;
1.89 + this.document = document;
1.90 +
1.91 + // TODO: think about a better way to maintain namespace decls.
1.92 + // this requires at least one NamespaceDecl per start tag,
1.93 + // which is rather expensive.
1.94 + addNamespaceDecl(uri,null,false);
1.95 + }
1.96 +
1.97 + public void addAttribute(String nsUri, String localName, Object arg) {
1.98 + checkWritable();
1.99 +
1.100 + // look for the existing ones
1.101 + Attribute a;
1.102 + for(a=firstAtt; a!=null; a=a.next) {
1.103 + if(a.hasName(nsUri,localName)) {
1.104 + break;
1.105 + }
1.106 + }
1.107 +
1.108 + // if not found, declare a new one
1.109 + if(a==null) {
1.110 + a = new Attribute(nsUri,localName);
1.111 + if(lastAtt==null) {
1.112 + assert firstAtt==null;
1.113 + firstAtt = lastAtt = a;
1.114 + } else {
1.115 + assert firstAtt!=null;
1.116 + lastAtt.next = a;
1.117 + lastAtt = a;
1.118 + }
1.119 + if(nsUri.length()>0)
1.120 + addNamespaceDecl(nsUri,null,true);
1.121 + }
1.122 +
1.123 + document.writeValue(arg,this,a.value);
1.124 + }
1.125 +
1.126 + /**
1.127 + * Declares a new namespace URI on this tag.
1.128 + *
1.129 + * @param uri
1.130 + * namespace URI to be bound. Can be empty, but must not be null.
1.131 + * @param prefix
1.132 + * If non-null and non-empty, this prefix is bound to the URI
1.133 + * on this element. If empty, then the runtime will still try to
1.134 + * use the URI as the default namespace, but it may fail to do so
1.135 + * because of the constraints in the XML.
1.136 + * <p>
1.137 + * If this parameter is null, the runtime will allocate an unique prefix.
1.138 + * @param requirePrefix
1.139 + * Used only when the prefix parameter is null. If true, this indicates
1.140 + * that the non-empty prefix must be assigned to this URI. If false,
1.141 + * then this URI might be used as the default namespace.
1.142 + * <p>
1.143 + * Normally you just need to set it to false.
1.144 + */
1.145 + public NamespaceDecl addNamespaceDecl(String uri, String prefix,boolean requirePrefix) {
1.146 + checkWritable();
1.147 +
1.148 + if(uri==null)
1.149 + throw new IllegalArgumentException();
1.150 + if(uri.length()==0) {
1.151 + if(requirePrefix)
1.152 + throw new IllegalArgumentException("The empty namespace cannot have a non-empty prefix");
1.153 + if(prefix!=null && prefix.length()>0)
1.154 + throw new IllegalArgumentException("The empty namespace can be only bound to the empty prefix");
1.155 + prefix = "";
1.156 + }
1.157 +
1.158 + // check for the duplicate
1.159 + for(NamespaceDecl n=firstNs; n!=null; n=n.next) {
1.160 + if(uri.equals(n.uri)) {
1.161 + if(prefix==null) {
1.162 + // reuse this binding
1.163 + n.requirePrefix |= requirePrefix;
1.164 + return n;
1.165 + }
1.166 + if(n.prefix==null) {
1.167 + // reuse this binding
1.168 + n.prefix = prefix;
1.169 + n.requirePrefix |= requirePrefix;
1.170 + return n;
1.171 + }
1.172 + if(prefix.equals(n.prefix)) {
1.173 + // reuse this binding
1.174 + n.requirePrefix |= requirePrefix;
1.175 + return n;
1.176 + }
1.177 + }
1.178 + if(prefix!=null && n.prefix!=null && n.prefix.equals(prefix))
1.179 + throw new IllegalArgumentException(
1.180 + "Prefix '"+prefix+"' is already bound to '"+n.uri+'\'');
1.181 + }
1.182 +
1.183 + NamespaceDecl ns = new NamespaceDecl(document.assignNewId(),uri,prefix,requirePrefix);
1.184 + if(lastNs==null) {
1.185 + assert firstNs==null;
1.186 + firstNs = lastNs = ns;
1.187 + } else {
1.188 + assert firstNs!=null;
1.189 + lastNs.next = ns;
1.190 + lastNs = ns;
1.191 + }
1.192 + return ns;
1.193 + }
1.194 +
1.195 + /**
1.196 + * Throws an error if the start tag has already been committed.
1.197 + */
1.198 + private void checkWritable() {
1.199 + if(isWritten())
1.200 + throw new IllegalStateException(
1.201 + "The start tag of "+this.localName+" has already been written. " +
1.202 + "If you need out of order writing, see the TypedXmlWriter.block method");
1.203 + }
1.204 +
1.205 + /**
1.206 + * Returns true if this start tag has already been written.
1.207 + */
1.208 + boolean isWritten() {
1.209 + return uri==null;
1.210 + }
1.211 +
1.212 + /**
1.213 + * A {@link StartTag} can be only written after
1.214 + * we are sure that all the necessary namespace declarations are given.
1.215 + */
1.216 + boolean isReadyToCommit() {
1.217 + if(owner!=null && owner.isBlocked())
1.218 + return false;
1.219 +
1.220 + for( Content c=getNext(); c!=null; c=c.getNext() )
1.221 + if(c.concludesPendingStartTag())
1.222 + return true;
1.223 +
1.224 + return false;
1.225 + }
1.226 +
1.227 + public void written() {
1.228 + firstAtt = lastAtt = null;
1.229 + uri = null;
1.230 + if(owner!=null) {
1.231 + assert owner.startTag==this;
1.232 + owner.startTag = null;
1.233 + }
1.234 + }
1.235 +
1.236 + boolean concludesPendingStartTag() {
1.237 + return true;
1.238 + }
1.239 +
1.240 + void accept(ContentVisitor visitor) {
1.241 + visitor.onStartTag(uri,localName,firstAtt,firstNs);
1.242 + }
1.243 +
1.244 + public String getPrefix(String nsUri) {
1.245 + NamespaceDecl ns = addNamespaceDecl(nsUri,null,false);
1.246 + if(ns.prefix!=null)
1.247 + // if the prefix has already been declared, use it.
1.248 + return ns.prefix;
1.249 + return ns.dummyPrefix;
1.250 + }
1.251 +}
