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.xsl.java;
030:
031: import com.caucho.java.JavaWriter;
032: import com.caucho.xml.QName;
033: import com.caucho.xsl.XslParseException;
034:
035: /**
036: * Returns the value of an expression.
037: */
038: public class XslValueOf extends XslNode {
039: private String _select;
040: private String _separator;
041: private String _disableOutputEscaping;
042:
043: /**
044: * Returns the tag name.
045: */
046: public String getTagName() {
047: return "xsl:value-of";
048: }
049:
050: /**
051: * Adds an attribute.
052: */
053: public void addAttribute(QName name, String value)
054: throws XslParseException {
055: if (name.getName().equals("select"))
056: _select = value;
057: else if (name.getName().equals("disable-output-escaping"))
058: _disableOutputEscaping = value;
059: else if (name.getName().equals("separator"))
060: _separator = value;
061: else
062: super .addAttribute(name, value);
063: }
064:
065: /**
066: * Ends the attributes.
067: */
068: public void endAttributes() throws XslParseException {
069: if (_select == null)
070: throw error(L
071: .l("'select' is a required attribute of <xsl:value-of>"));
072: }
073:
074: /**
075: * Adds a child.
076: */
077: public void addChild(XslNode node) throws XslParseException {
078: throw error(L.l("element <{0}> is not allowed in <{1}>.", node
079: .getTagName(), getTagName()));
080: }
081:
082: /**
083: * Generates the code for the tag
084: *
085: * @param out the output writer for the generated java.
086: */
087: public void generate(JavaWriter out) throws Exception {
088: String var = null;
089:
090: if ("yes".equals(_disableOutputEscaping)) {
091: var = "_xsl_out_" + _gen.generateId();
092: out.println("boolean " + var
093: + " = out.disableEscaping(true);");
094: } else if ("no".equals(_disableOutputEscaping)) {
095: var = "_xsl_out_" + _gen.generateId();
096: out.println("boolean " + var
097: + " = out.disableEscaping(false);");
098: } else if (_disableOutputEscaping != null)
099: throw error(L
100: .l(
101: "'{0}' is an unknown value for disable-output-escaping. 'yes' and 'no' are the valid values.",
102: _disableOutputEscaping));
103:
104: printStringExpr(out, _select);
105:
106: if (var != null)
107: out.println("out.disableEscaping(" + var + ");");
108: }
109: }
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