JDK14/Java14源码在线阅读

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 * 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
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/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file and, per its terms, should not be removed:
 *
 * Copyright (c) 2004 World Wide Web Consortium,
 *
 * (Massachusetts Institute of Technology, European Research Consortium for
 * Informatics and Mathematics, Keio University). All Rights Reserved. This
 * work is distributed under the W3C(r) Software License [1] 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.
 *
 * [1] http://www.w3.org/Consortium/Legal/2002/copyright-software-20021231
 */

package org.w3c.dom;

/**
 * This interface represents a known entity, either parsed or unparsed, in an
 * XML document. Note that this models the entity itself <em>not</em> the entity declaration.
 * <p>The <code>nodeName</code> attribute that is inherited from
 * <code>Node</code> contains the name of the entity.
 * <p>An XML processor may choose to completely expand entities before the
 * structure model is passed to the DOM; in this case there will be no
 * <code>EntityReference</code> nodes in the document tree.
 * <p>XML does not mandate that a non-validating XML processor read and
 * process entity declarations made in the external subset or declared in
 * parameter entities. This means that parsed entities declared in the
 * external subset need not be expanded by some classes of applications, and
 * that the replacement text of the entity may not be available. When the <a href='http://www.w3.org/TR/2004/REC-xml-20040204#intern-replacement'>
 * replacement text</a> is available, the corresponding <code>Entity</code> node's child list
 * represents the structure of that replacement value. Otherwise, the child
 * list is empty.
 * <p>DOM Level 3 does not support editing <code>Entity</code> nodes; if a
 * user wants to make changes to the contents of an <code>Entity</code>,
 * every related <code>EntityReference</code> node has to be replaced in the
 * structure model by a clone of the <code>Entity</code>'s contents, and
 * then the desired changes must be made to each of those clones instead.
 * <code>Entity</code> nodes and all their descendants are readonly.
 * <p>An <code>Entity</code> node does not have any parent.
 * <p ><b>Note:</b> If the entity contains an unbound namespace prefix, the
 * <code>namespaceURI</code> of the corresponding node in the
 * <code>Entity</code> node subtree is <code>null</code>. The same is true
 * for <code>EntityReference</code> nodes that refer to this entity, when
 * they are created using the <code>createEntityReference</code> method of
 * the <code>Document</code> interface.
 * <p>See also the <a href='http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407'>Document Object Model (DOM) Level 3 Core Specification</a>.
 */
public interface Entity extends Node {
    /**
     * The public identifier associated with the entity if specified, and
     * <code>null</code> otherwise.
     */
    public String getPublicId();

    /**
     * The system identifier associated with the entity if specified, and
     * <code>null</code> otherwise. This may be an absolute URI or not.
     */
    public String getSystemId();

    /**
     * For unparsed entities, the name of the notation for the entity. For
     * parsed entities, this is <code>null</code>.
     */
    public String getNotationName();

    /**
     * An attribute specifying the encoding used for this entity at the time
     * of parsing, when it is an external parsed entity. This is
     * <code>null</code> if it an entity from the internal subset or if it
     * is not known.
     * @since 1.5, DOM Level 3
     */

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