/*

 * Copyright (c) 1998, 2008, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package javax.swing.text.html.parser;

import java.util.Hashtable;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.Reader;

import java.io.CharArrayReader;

import java.net.URL;

/**

 * An entity is described in a DTD using the ENTITY construct.

 *

 * @see DTD

 * @author Arthur van Hoff

 */

public final

class Entity implements DTDConstants {

    /**

     * The name of the entity.

     */

    public String name;

    /**

     * The type of the entity.

     */

    public int type;

    /**

     * The char array of data.

     */

    public char data[];

    /**

     * Creates an entity.

     * @param name the name of the entity

     * @param type the type of the entity

     * @param data the char array of data

     */

    public Entity(String name, int type, char data[]) {

        this.name = name;

        this.type = type;

        this.data = data;

    }

    /**

     * Gets the name of the entity.

     * @return the name of the entity, as a <code>String</code>

     */

    public String getName() {

        return name;

    }

    /**

     * Gets the type of the entity.

     * @return the type of the entity

     */

    public int getType() {

        return type & 0xFFFF;

    }

    /**

     * Returns <code>true</code> if it is a parameter entity.

     * @return <code>true</code> if it is a parameter entity

     */

    public boolean isParameter() {

        return (type & PARAMETER) != 0;

    }

    /**

     * Returns <code>true</code> if it is a general entity.

     * @return <code>true</code> if it is a general entity

     */

    public boolean isGeneral() {

        return (type & GENERAL) != 0;

    }

    /**

     * Returns the <code>data</code>.

     * @return the <code>data</code>

     */

    public char getData()[] {

        return data;

    }

    /**

     * Returns the data as a <code>String</code>.

     * @return the data as a <code>String</code>

     */

    public String getString() {

        return new String(data, 0, data.length);

    }

    static Hashtable<String, Integer> entityTypes = new Hashtable<String, Integer>();

    static {

        entityTypes.put("PUBLIC", Integer.valueOf(PUBLIC));

        entityTypes.put("CDATA", Integer.valueOf(CDATA));

        entityTypes.put("SDATA", Integer.valueOf(SDATA));

        entityTypes.put("PI", Integer.valueOf(PI));

        entityTypes.put("STARTTAG", Integer.valueOf(STARTTAG));

        entityTypes.put("ENDTAG", Integer.valueOf(ENDTAG));

        entityTypes.put("MS", Integer.valueOf(MS));

        entityTypes.put("MD", Integer.valueOf(MD));

        entityTypes.put("SYSTEM", Integer.valueOf(SYSTEM));

    }

    /**

     * Converts <code>nm</code> string to the corresponding

     * entity type.  If the string does not have a corresponding

     * entity type, returns the type corresponding to "CDATA".

     * Valid entity types are: "PUBLIC", "CDATA", "SDATA", "PI",

     * "STARTTAG", "ENDTAG", "MS", "MD", "SYSTEM".

     *

     * @param nm the string to be converted

     * @return the corresponding entity type, or the type corresponding

     *   to "CDATA", if none exists

     */

    public static int name2type(String nm) {

        Integer i = entityTypes.get(nm);

        return (i == null) ? CDATA : i.intValue();

    }

}