Source Code Cross Referenced for ZeroOrMoreItem.java in  » EJB-Server-resin-3.1.5 » resin » com » caucho » relaxng » program » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server resin 3.1.5 » resin » com.caucho.relaxng.program 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
003:         *
004:         * This file is part of Resin(R) Open Source
005:         *
006:         * Each copy or derived work must preserve the copyright notice and this
007:         * notice unmodified.
008:         *
009:         * Resin Open Source is free software; you can redistribute it and/or modify
010:         * it under the terms of the GNU General Public License as published by
011:         * the Free Software Foundation; either version 2 of the License, or
012:         * (at your option) any later version.
013:         *
014:         * Resin Open Source is distributed in the hope that it will be useful,
015:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
016:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017:         * of NON-INFRINGEMENT.  See the GNU General Public License for more
018:         * details.
019:         *
020:         * You should have received a copy of the GNU General Public License
021:         * along with Resin Open Source; if not, write to the
022:         *   Free SoftwareFoundation, Inc.
023:         *   59 Temple Place, Suite 330
024:         *   Boston, MA 02111-1307  USA
025:         *
026:         * @author Scott Ferguson
027:         */
028:
029:        package com.caucho.relaxng.program;
030:
031:        import com.caucho.relaxng.RelaxException;
032:        import com.caucho.util.L10N;
033:        import com.caucho.xml.QName;
034:
035:        import java.util.HashSet;
036:        import java.util.Iterator;
037:
038:        /**
039:         * Generates programs from patterns.
040:         */
041:        public class ZeroOrMoreItem extends Item {
042:            protected final static L10N L = new L10N(ZeroOrMoreItem.class);
043:
044:            private Item _item;
045:
046:            public ZeroOrMoreItem(Item item) {
047:                _item = item;
048:            }
049:
050:            /**
051:             * Returns the item.
052:             */
053:            public Item getItem() {
054:                return _item;
055:            }
056:
057:            /**
058:             * Returns the first set, the set of element names possible.
059:             */
060:            public void firstSet(HashSet<QName> set) {
061:                _item.firstSet(set);
062:            }
063:
064:            /**
065:             * Returns the first set, the set of element names possible.
066:             */
067:            public void requiredFirstSet(HashSet<QName> set) {
068:            }
069:
070:            /**
071:             * The element always allows
072:             */
073:            public boolean allowEmpty() {
074:                return true;
075:            }
076:
077:            /**
078:             * Return all possible child items or null
079:             */
080:            public Iterator<Item> getItemsIterator() {
081:                return itemIterator(_item);
082:            }
083:
084:            /**
085:             * Returns the next item on the match.
086:             *
087:             * @param name the name of the element
088:             * @param contItem the continuation item
089:             */
090:            public Item startElement(QName name) throws RelaxException {
091:                Item next = _item.startElement(name);
092:
093:                if (next == null)
094:                    return null;
095:                else
096:                    return next.groupContinuation(this );
097:            }
098:
099:            /**
100:             * Returns the first set, the set of attribute names possible.
101:             */
102:            public void attributeSet(HashSet<QName> set) {
103:                _item.attributeSet(set);
104:            }
105:
106:            /**
107:             * Returns true if the attribute is allowed.
108:             *
109:             * @param name the name of the attribute
110:             * @param value the value of the attribute
111:             *
112:             * @return true if the attribute is allowed
113:             */
114:            public boolean allowAttribute(QName name, String value)
115:                    throws RelaxException {
116:                return _item.allowAttribute(name, value);
117:            }
118:
119:            /**
120:             * Returns true if the element is allowed somewhere in the item.
121:             * allowsElement is used for error messages to give more information
122:             * in cases of order dependency.
123:             *
124:             * @param name the name of the element
125:             *
126:             * @return true if the element is allowed somewhere
127:             */
128:            public boolean allowsElement(QName name) {
129:                return _item.allowsElement(name);
130:            }
131:
132:            /**
133:             * Returns the pretty printed syntax.
134:             */
135:            public String toSyntaxDescription(int depth) {
136:                return _item.toSyntaxDescription(depth) + "*";
137:            }
138:
139:            /**
140:             * Returns true for an element with simple syntax.
141:             */
142:            protected boolean isSimpleSyntax() {
143:                return _item.isSimpleSyntax();
144:            }
145:
146:            /**
147:             * Returns the hash code for the empty item.
148:             */
149:            public int hashCode() {
150:                return 17 + _item.hashCode();
151:            }
152:
153:            /**
154:             * Returns true if the object is an empty item.
155:             */
156:            public boolean equals(Object o) {
157:                if (this  == o)
158:                    return true;
159:
160:                if (!(o instanceof  ZeroOrMoreItem))
161:                    return false;
162:
163:                ZeroOrMoreItem item = (ZeroOrMoreItem) o;
164:
165:                return _item.equals(item._item);
166:            }
167:
168:            public String toString() {
169:                return "ZeroOrMoreItem[" + _item + "]";
170:            }
171:        }
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