mirror of git://gcc.gnu.org/git/gcc.git
131 lines
4.7 KiB
Java
131 lines
4.7 KiB
Java
/* DomEntityReference.java --
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Copyright (C) 1999,2000,2001,2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.xml.dom;
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import org.w3c.dom.DocumentType;
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import org.w3c.dom.Entity;
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import org.w3c.dom.EntityReference;
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/**
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* <p> "EntityReference" implementation (reference to parsed entity).
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* This is a non-core DOM class, supporting the "XML" feature.
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* It does not represent builtin entities (such as "&amp;")
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* or character references, which are always directly expanded in
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* DOM trees.</p>
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*
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* <p> Note that while the DOM specification permits these nodes to have
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* a readonly set of children, this is not required. Similarly, it does
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* not require a DOM to couple EntityReference nodes with any Entity nodes
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* that have the same entity name (and equivalent children). It also
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* effectively guarantees that references created directly or indirectly
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* through the <em>Document.ImportNode</em> method will not have children.
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* The level of functionality you may get is extremely variable.
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*
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* <p> Also significant is that even at their most functional level, the fact
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* that EntityReference children must be readonly has caused significant
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* problems when modifying work products held in DOM trees. Other problems
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* include issues related to undeclared namespace prefixes (and references
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* to the current default namespace) that may be found in the text of such
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* parsed entities nodes. These must be contextually bound as part of DOM
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* tree construction. When such nodes are moved, the namespace associated
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* with a given prefix (or default) may change to be in conflict with the
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* namespace bound to the node at creation time.
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*
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* <p> In short, <em>avoid using this DOM functionality</em>.
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*
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* @see DomDoctype
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* @see DomEntity
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*
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* @author David Brownell
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* @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
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*/
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public class DomEntityReference
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extends DomNode
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implements EntityReference
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{
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private String name;
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/**
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* Constructs an EntityReference node associated with the specified
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* document. The creator should populate this with whatever contents
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* are appropriate, and then mark it as readonly.
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*
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* <p>This constructor should only be invoked by a Document as part of
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* its createEntityReference functionality, or through a subclass which
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* is similarly used in a "Sub-DOM" style layer.
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*
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* @see DomNode#makeReadonly
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*/
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protected DomEntityReference(DomDocument owner, String name)
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{
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super(ENTITY_REFERENCE_NODE, owner);
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this.name = name;
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}
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/**
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* Returns the name of the referenced entity.
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* @since DOM Level 1 Core
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*/
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public final String getNodeName()
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{
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return name;
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}
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/**
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* The base URI of an entity reference is the base URI where the entity
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* declaration occurs.
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* @since DOM Level 3 Core
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*/
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public final String getBaseURI()
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{
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DocumentType doctype = owner.getDoctype();
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if (doctype == null)
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{
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return null;
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}
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Entity entity = (Entity) doctype.getEntities().getNamedItem(name);
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if (entity == null)
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{
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return null;
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}
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return entity.getBaseURI();
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}
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}
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