/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jsp.java;
import com.caucho.jsp.JspParseException;
import com.caucho.jsp.TagInstance;
import com.caucho.util.CharBuffer;
/**
* Represents the body for a fragment (jsp:attribute or jsp:body)
*/
abstract public class JspFragmentNode extends JspContainerNode
implements JspSegmentNode
{
private int _fragmentCode;
private String _fragmentName;
private boolean _isValueFragment;
private boolean _isJspFragment;
public JspFragmentNode()
{
}
/**
* Called after all the attributes from the tag.
*/
@Override
public void endAttributes()
throws JspParseException
{
_fragmentCode = _gen.uniqueId();
_fragmentName = "_jsp_fragment_" + _fragmentCode;
}
/**
* Returns the fragment name.
*/
public String getFragmentName()
{
return _fragmentName;
}
/**
* Returns the tag name for the current tag.
*/
public String getCustomTagName()
{
return "_jsp_parent_tag";
}
/**
* Adds a text node.
*/
public JspNode addText(String text)
throws JspParseException
{
JspNode node = new StaticText(_gen, text, this);
addChild(node);
return node;
}
/**
* Returns true if trimming is enabled.
*/
public boolean isTrim()
{
return false;
}
/**
* Returns true if the children are static.
*/
public boolean isStatic()
{
if (_children == null)
return true;
for (int i = 0; i < _children.size(); i++) {
if (! _children.get(i).isStatic())
return false;
}
return true;
}
/**
* Returns true if the children are static.
*/
public boolean isValueFragment()
{
return _isValueFragment;
}
public int getFragmentCode()
{
return _fragmentCode;
}
/**
* Set true if the fragment is used as a fragment object.
*/
public void setJspFragment(boolean isFragment)
{
_isJspFragment = isFragment;
}
/**
* Set true if the fragment is used as a fragment object.
*/
public boolean isJspFragment()
{
return _isJspFragment;
}
/**
* Generates code for the fragment variables.
*/
public void generateFragmentPrologue(JspJavaWriter out)
throws Exception
{
if (_isValueFragment)
return;
_isJspFragment = true;
if (isStatic())
out.println("com.caucho.jsp.StaticJspFragmentSupport " + _fragmentName + " = null;");
else
out.println("_CauchoFragment_" + _fragmentCode + " " + _fragmentName + " = null;");
}
/**
* Generates the children.
*/
@Override
public void generate(JspJavaWriter out)
throws Exception
{
if (hasScriptingElement() && isJspFragment()) {
JspNode node = findScriptingNode();
// jsp/104c jsp/104d
if (node == null)
throw error(L.l("Fragments may not contain scripting elements"));
else if (node._filename.equals(_filename))
throw node.error(L.l("Fragments may not contain scripting elements"));
}
generateChildren(out);
}
/**
* Generates the code for a fragment.
*/
protected String generateValue()
throws Exception
{
if (isStatic())
return '"' + escapeJavaString(getStaticText()) + '"';
_isValueFragment = true;
if (hasScriptingElement() && isJspFragment()) {
JspNode node = findScriptingNode();
if (node == null)
throw error(L.l("Fragments may not contain scripting elements"));
else if (node._filename.equals(_filename))
throw node.error(L.l("Fragments may not contain scripting elements"));
}
if (isSingleExpression()) {
JspNode node = findScriptingNode();
return ((JspExpression) node).generateValue();
}
_gen.addFragment(this);
TagInstance parent = getParent().getTag();
CharBuffer cb = new CharBuffer();
// cb.append("_CauchoFragment.");
cb.append(_fragmentName + "(pageContext, ");
for (;
parent != null && parent.isTagFileTag();
parent = parent.getParent()) {
}
if (parent == null || parent.getId() == TagInstance.TOP_TAG)
cb.append("null");
else if (parent.getId().startsWith("top_"))
cb.append("_jsp_parent_tag");
else if (! hasCustomTag())
cb.append(parent.getId());
else if (parent.isSimpleTag())
cb.append(parent.getId() + "_adapter");
else
cb.append(parent.getId());
if (_gen instanceof JavaTagGenerator) {
JavaTagGenerator tagGen = (JavaTagGenerator) _gen;
if (tagGen.isStaticDoTag())
cb.append(", _jspBody"); //jsp/100f
else
cb.append(", getJspBody()"); //jsp/100g
} else
cb.append(", null");
cb.append(", _jsp_state");
cb.append(", _jsp_pageManager");
cb.append(")");
return cb.close();
}
/**
* Generates the code for the fragment method.
*/
void generateValueMethod(JspJavaWriter out)
throws Exception
{
if (hasScriptingElement() && isJspFragment()) {
JspNode node = findScriptingNode();
if (node == null)
throw error(L.l("Fragments may not contain scripting elements"));
else if (node._filename.equals(_filename))
throw node.error(L.l("Fragments may not contain scripting elements"));
}
/*
out.println();
out.println("protected void _jsp_invoke(JspWriter out)");
out.println(" throws Throwable");
out.println("{");
out.println("}");
*/
out.println();
// jsp/1c0o - non-static
//if (_isValueFragment)
// out.print("static ");
out.println("String " + _fragmentName + "(");
out.println(" com.caucho.jsp.PageContextImpl pageContext,");
out.println(" javax.servlet.jsp.tagext.JspTag _jsp_parent_tag,");
out.println(" javax.servlet.jsp.tagext.JspFragment _jspBody,");
out.println(" TagState _jsp_state,");
out.println(" com.caucho.jsp.PageManager _jsp_pageManager)");
out.println(" throws Throwable");
out.println("{");
out.pushDepth();
out.println("com.caucho.jsp.PageContextImpl _jsp_parentContext = pageContext;");
out.println("JspWriter out = pageContext.pushBody();");
out.println("javax.el.ELContext _jsp_env = pageContext.getELContext();");
if (hasScripting()) {
out.println("javax.servlet.http.HttpServletRequest request = (javax.servlet.http.HttpServletRequest) pageContext.getRequest();");
out.println("javax.servlet.http.HttpServletResponse response = (javax.servlet.http.HttpServletResponse) pageContext.getResponse();");
out.println("javax.servlet.http.HttpSession session = pageContext.getSession();");
out.println("javax.servlet.ServletContext application = pageContext.getServletContext();");
out.println("javax.servlet.ServletConfig config = pageContext.getServletConfig();");
}
out.println("try {");
out.pushDepth();
generatePrologue(out);
generate(out);
out.print("return ((com.caucho.jsp.BodyContentImpl) out)");
/*
if (isTrim())
out.println(".getTrimString();");
else
out.println(".getString();");
*/
// jsp/18do
out.println(".getString();");
out.popDepth();
out.println("} finally {");
out.pushDepth();
out.println("pageContext.popAndReleaseBody();");
out.popDepth();
out.println("}");
out.popDepth();
out.println("}");
}
}