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Diffstat (limited to 'libjava/javax/swing/text/html/parser/ContentModel.java')
| -rwxr-xr-x | libjava/javax/swing/text/html/parser/ContentModel.java | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/libjava/javax/swing/text/html/parser/ContentModel.java b/libjava/javax/swing/text/html/parser/ContentModel.java deleted file mode 100755 index deb7b1602bb..00000000000 --- a/libjava/javax/swing/text/html/parser/ContentModel.java +++ /dev/null @@ -1,218 +0,0 @@ -/* ContentModel.java -- - Copyright (C) 2005 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath 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 for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - - -package javax.swing.text.html.parser; - -import gnu.javax.swing.text.html.parser.models.transformer; - -import java.io.Serializable; - -import java.util.Vector; - -/** - * A representation of the element content. The instances of this class - * can be arranged into the linked list, representing a BNF expression. - * The content model is constructed as a branched tree structure in the - * following way: - * <pre> - * a = new ContentModel('+', A, null); // a reprensents A+ - * b = new ContentModel('&', B, a); // b represents B & A+ - * c = new ContentModel('*', b, null); // c represents ( B & A+) * - * d = new ContentModel('|', new ContentModel('*', A, null), - * new ContentModel('?', B, null)); // d represents ( A* | B? ) - * </pre> - * where the valid operations are: - * <ul> - * <li><code>E* </code> E occurs zero or more times</li> - * <li><code>E+ </code> E occurs one or more times</li> - * <li><code>E? </code> E occurs once or not atl all</li> - * <li><code>A,B</code> A occurs before B</li> - * <li><code>A|B</code> both A and B are permitted in any order. - * The '|' alone does not permit the repetetive occurence of A or B - * (use <code>(A|B)*</code>.</li> - * <li><code>A&B</code> both A and B must occur once (in any order)</li> - * </ul> - * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) - */ -public final class ContentModel - implements Serializable -{ - /** Use serialVersionUID for interoperability. */ - private static final long serialVersionUID = -1130825523866321257L; - - /** - * The next content model model ( = pointer to the next element of - * the linked list) for the binary expression (',','&' or '|'). Null - * for the last element in the list. - */ - public ContentModel next; - - /** - * The document content, containing either Element or the enclosed - * content model (that would be in the parentheses in BNF expression). - */ - public Object content; - - /** - * Specifies the BNF operation between this node and the node, - * stored in the field <code>next</code> (or for this node, if it is - * an unary operation. - */ - public int type; - - /** Create a content model initializing all fields to default values. */ - public ContentModel() - { - } - - /** - * Create a content model, consisting of the single element. - * Examples: - *<code> - * a = new ContentModel('+', A, null); // a reprensents A+ - * b = new ContentModel('&', B, a); // b represents B & A+ - * c = new ContentModel('*', b, null); // c represents ( B & A+) * - * d = new ContentModel('|', A, - * new ContentModel('?',b, null); - * // d represents - * </code> - */ - public ContentModel(Element a_content) - { - content = a_content; - } - - /** - * Create a content model, involving expression of the given type. - * @param a_type The expression operation type ('*','?' or '+' - * @param a_content The content for that the expression is applied. - */ - public ContentModel(int a_type, ContentModel a_content) - { - content = a_content; - type = a_type; - } - - /** - * Create a content model, involving binary expression of the given type. - * @param a_type The expression operation type ( ',', '|' or '&'). - * @param a_content The content of the left part of the expression. - * @param a_next The content model, representing the right part of the - * expression. - */ - public ContentModel(int a_type, Object a_content, ContentModel a_next) - { - content = a_content; - type = a_type; - next = a_next; - } - - /** - * Adds all list elements to the given vector, ignoring the - * operations between the elements. The old vector values are not - * discarded. - * @param elements - a vector to add the values to. - */ - public void getElements(Vector elements) - { - ContentModel c = this; - - while (c != null) - { - elements.add(c.content); - c = c.next; - } - } - - /** - * Checks if the content model matches an empty input stream. - * The empty content is created using SGML DTD keyword EMPTY. - * The empty model is a model with the content field equal to null. - * - * @return true if the content field is equal to null. - */ - public boolean empty() - { - return content == null; - } - - /** - * Get the element, stored in the <code>next.content</code>. - * The method is programmed as the part of the standard API, but not - * used in this implementation. - * @return the value of the field <code>next</code>. - */ - public Element first() - { - return (Element) next.content; - } - - /** - * Checks if this object can potentially be the first token in the - * ContenModel list. The method is programmed as the part of the - * standard API, but not used in this implementation. - */ - public boolean first(Object token) - { - ContentModel c = this; - while (c.next != null) - { - if (c.content != null && c.content.toString().equals(token.toString()) && - c.type != ',' - ) - - // Agree if the operation with the preceeding element - // is not the comma operation. - return true; - c = c.next; - } - return false; - } - - /** - * Returns a string representation (an expression) of this content model. - * The expression has BNF-like syntax, except the absence of the - * unary operator is additionally indicated by " ' ". It is - * advisable to check the created models for correctness using this - * method. - */ - public String toString() - { - return transformer.transform(this).toString(); - } -} |
