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: * Sets an xsl variable.
037: */
038: public class XslVariable extends XslNode implements XslTopNode {
039: private String _name;
040: private String _select;
041:
042: private boolean _isGlobal;
043:
044: /**
045: * Returns the tag name.
046: */
047: public String getTagName() {
048: return "xsl:variable";
049: }
050:
051: /**
052: * Set true for global param.
053: */
054: public void setGlobal(boolean isGlobal) {
055: _isGlobal = true;
056: }
057:
058: /**
059: * Adds an attribute.
060: */
061: public void addAttribute(QName name, String value)
062: throws XslParseException {
063: if (name.getName().equals("name"))
064: _name = value;
065: else if (name.getName().equals("select"))
066: _select = value;
067: else
068: super .addAttribute(name, value);
069: }
070:
071: /**
072: * Ends the attributes.
073: */
074: public void endAttributes() throws XslParseException {
075: if (_name == null)
076: throw error(L
077: .l("'name' is a required attribute of <xsl:variable>"));
078: }
079:
080: /**
081: * Ends the element.
082: */
083: public void endElement() {
084: addVariableCount();
085: }
086:
087: /**
088: * Generates the code for the tag
089: *
090: * @param out the output writer for the generated java.
091: */
092: public void generate(JavaWriter out) throws Exception {
093: if (_select != null) {
094: int index = addExpr(_select);
095:
096: if (_isGlobal) {
097: out.print("env.setGlobal(\"" + _name + "\", ");
098: out.print("_exprs[" + index
099: + "].evalObject(node, env));");
100: } else {
101: out.print("_exprs[" + index + "]");
102:
103: out.println(".addVar(env, \"" + _name
104: + "\", node, env);");
105: }
106: } else {
107: String id = "frag" + _gen.generateId();
108:
109: out.println("XMLWriter " + id + " = out.pushFragment();");
110:
111: generateChildren(out);
112:
113: if (_isGlobal)
114: out.print("env.setGlobal(\"");
115: else
116: out.print("env.addVar(\"");
117:
118: out.printJavaString(_name);
119: out.println("\", out.popFragment(" + id + "));");
120: }
121: /*
122: boolean isDisabled = disable.equals("yes");
123: if (isDisabled)
124: startDisableEscaping();
125: */
126:
127: // printStringExpr(out, _select);
128: /*
129: if (isDisabled)
130: endDisableEscaping();
131: */
132: }
133:
134: protected void printPopScope(JavaWriter out) throws Exception {
135: }
136: }
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