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.util.L10N;
032: import com.caucho.xml.QName;
033:
034: import java.util.HashSet;
035:
036: /**
037: * Generates programs from patterns.
038: */
039: public class TextItem extends Item {
040: protected final static L10N L = new L10N(TextItem.class);
041:
042: private final static QName TEXT_NAME = new QName("#text", "");
043:
044: public final static TextItem TEXT = new TextItem();
045:
046: private TextItem() {
047: }
048:
049: /**
050: * Returns the first set, the set of element names possible.
051: */
052: public void firstSet(HashSet<QName> set) {
053: set.add(TEXT_NAME);
054: }
055:
056: /**
057: * Text allows the empty match.
058: */
059: public boolean allowEmpty() {
060: return true;
061: }
062:
063: /**
064: * Text repeats
065: */
066: @Override
067: public Item text(CharSequence text) {
068: return this ;
069: }
070:
071: /**
072: * Returns the pretty printed syntax.
073: */
074: public String toSyntaxDescription(int depth) {
075: return "text";
076: }
077:
078: /**
079: * True for simple syntax.
080: */
081: public boolean isSimpleSyntax() {
082: return true;
083: }
084:
085: /**
086: * Returns the hash code for the empty item.
087: */
088: public int hashCode() {
089: return 191;
090: }
091:
092: /**
093: * Returns true if the object is an empty item.
094: */
095: public boolean equals(Object o) {
096: if (this == o)
097: return true;
098:
099: if (!(o instanceof TextItem))
100: return false;
101:
102: return true;
103: }
104:
105: public String toString() {
106: return "TextItem[]";
107: }
108: }
|