javataggenerator.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 929 行 · 第 1/2 页

      
      generateTagVariablesAtEnd(out);
    } else {
      out.println("doTag(_jsp_parentContext, pageContext, out, null);");
    }
    
    out.popDepth();
    out.println("} catch (Throwable e) {");
    out.println("  if (e instanceof java.io.IOException)");
    out.println("    throw (java.io.IOException) e;");
    out.println("  throw com.caucho.jsp.QJspException.createJspException(e);");
    out.println("}");

    if (hasScripting() && _variables.size() > 0) {
      out.println("finally {");
      out.pushDepth();
      
      generateTagVariablesAtEnd(out);
      
      out.println("setJspContext(_jsp_parentContext);");
      out.println("com.caucho.jsp.PageContextWrapper.free(pageContext);");
      
      out.popDepth();
      out.println("}");
    }
  
    out.popDepth();
    out.println("}");
  }

  /**
   * Generates the attribute definitions.
   *
   * @param out the writer to the .java source
   */
  protected void generateTagAttributes(JspJavaWriter out)
    throws IOException, JspParseException
  {
    for (int i = 0; i < _attributes.size(); i++) {
      TldAttribute attr = _attributes.get(i);

      String name = attr.getName();

      String upperName;
      char ch = name.charAt(0);
      upperName = Character.toUpperCase(ch) + name.substring(1);

      Class cl = attr.getType();
      if (cl == null)
        cl = String.class;
      String type = cl.getName();

      String isSetName = "_jsp_" + name + "_isSet";
      String fieldName = toFieldName(name);
      
      out.println("if (" + isSetName + ")");
      out.println("  pageContext.setAttribute(\"" + name + "\", " +
                  JspNode.toELObject(fieldName, cl) + ");");
    }

    // jsp/10a1
    if (_dynamicAttributes != null) {
      out.println("pageContext.setAttribute(\"" + _dynamicAttributes + "\"," +
		  toFieldName(_dynamicAttributes) + ");");
    }
  }

  /**
   * Prints the _jspService header
   */
  protected void generateStaticDoTag(JspJavaWriter out, JspNode node)
    throws Exception
  {
    out.println();
    out.println("public static void doTag(javax.servlet.jsp.JspContext _jsp_parentContext,");
    out.println("                         com.caucho.jsp.PageContextWrapper pageContext,");
    out.println("                         javax.servlet.jsp.JspWriter out,");
    out.println("                         javax.servlet.jsp.tagext.JspFragment _jspBody)");
    out.println("  throws Throwable");
    out.println("{");
    out.pushDepth();

    out.println("javax.el.ELContext _jsp_env = pageContext.getELContext();");

    if (node.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("TagState _jsp_state = new TagState();");
    out.println("javax.servlet.jsp.tagext.JspTag _jsp_parent_tag = null;");

    generatePrologue(out);

    out.println("try {");
    out.pushDepth();
    
    node.generate(out);

    out.popDepth();
    out.println("} finally {");
    out.pushDepth();
      
    generateTagVariablesAtEnd(out);
      
    out.println("com.caucho.jsp.PageContextWrapper.free(pageContext);");
      
    out.popDepth();
    out.println("}");

    out.popDepth();
    out.println("}");
  }

  /**
   * Generates prologue stuff
   *
   * @param out the writer to the .java source
   */
  protected void generatePrologue(JspJavaWriter out)
    throws Exception
  {
    _rootNode.generatePrologue(out);
    
    for (int i = 0; i < _variables.size(); i++) {
      TldVariable var = _variables.get(i);

      if (var.getNameFromAttribute() != null) {
	out.print("String _jsp_var_from_attribute_" + i + " = (String) ");
	out.println("pageContext.getAttribute(\"" +
		    var.getNameFromAttribute() + "\");");
      }
      
      if ("AT_END".equals(var.getScope()))
	continue;

      String srcName = var.getNameGiven();
      if (srcName == null)
	srcName = var.getAlias();
      
      String dstName;
      if (var.getNameGiven() != null)
	dstName = "\"" + var.getNameGiven() + "\"";
      else
	dstName = "_jsp_var_from_attribute_" + i;

      if ("NESTED".equals(var.getScope())) {
	out.print("Object _jsp_nested_var_" + i + " = ");
	out.println("_jsp_parentContext.getAttribute(" + dstName + ");");
      }
      /*
      else {
	out.print("pageContext.setAttribute(\"" + srcName + "\",");
	out.println("_jsp_parentContext.getAttribute(" + dstName + "));");
      }
      */
    }
  }

  /**
   * Generates the variable setting.
   *
   * @param out the writer to the .java source
   */
  protected void generateTagVariablesAtEnd(JspJavaWriter out)
    throws IOException, JspParseException
  {
    for (int i = 0; i < _variables.size(); i++) {
      TldVariable var = _variables.get(i);
      
      String srcName = var.getNameGiven();
      if (srcName == null)
	srcName = var.getAlias();
      
      String dstName;
      if (var.getNameGiven() != null)
	dstName = "\"" + var.getNameGiven() + "\"";
      else
	dstName = "_jsp_var_from_attribute_" + i;

      if ("NESTED".equals(var.getScope())) {
	out.println("_jsp_parentContext.setAttribute(" + dstName + ", _jsp_nested_var_" + i + ");");
      }
      else {
	out.print("_jsp_parentContext.setAttribute(" + dstName + ",");
	out.println("pageContext.getAttribute(\"" + srcName + "\"));");
      }
    }
  }

  public TagInfo generateTagInfo(String className, TagLibraryInfo taglib)
  {
    init(className);
    
    TldTag tag = new TldTag();
    
    for (int i = 0; i < _attributes.size(); i++) {
      TldAttribute attr = _attributes.get(i);

      tag.addAttribute(attr);
    }
    
    for (int i = 0; i < _variables.size(); i++) {
      TldVariable var = _variables.get(i);

      try {
	tag.addVariable(var);
      } catch (Exception e) {
	log.log(Level.WARNING, e.toString(), e);
      }
    }
    
    String bodyContent = _bodyContent;
    if (bodyContent == null)
      bodyContent = "scriptless";
    
    return new TagInfoExt(tag.getName(),
			  _fullClassName,
			  bodyContent,
			  getDescription(),
			  taglib,
			  null,
			  tag.getAttributes(),
			  getDisplayName(),
			  getSmallIcon(),
			  getLargeIcon(),
			  tag.getVariables(),
			  _dynamicAttributes != null,
			  _dynamicAttributes,
			  null);
  }
  
  /**
   * Generates the attribute definitions.
   *
   * @param out the writer to the .java source
   */
  protected void generateTagInfo(JspJavaWriter out)
    throws IOException, JspParseException
  {
    /*
    out.println();
    out.println("public javax.servlet.jsp.tagext.TagInfo _caucho_getTagInfo()");
    out.println("  throws com.caucho.config.ConfigException");
    out.println("{");
    out.pushDepth();
    out.println("  return _caucho_getTagInfo(_caucho_getTagLibrary());");
    out.popDepth();
    out.println("}");
    */
    
    out.println();
    out.println("public javax.servlet.jsp.tagext.TagInfo _caucho_getTagInfo(javax.servlet.jsp.tagext.TagLibraryInfo taglib)");
    out.println("  throws com.caucho.config.ConfigException");
    out.println("{");
    out.pushDepth();
    out.println("com.caucho.jsp.cfg.TldTag tag = new com.caucho.jsp.cfg.TldTag();");

    out.println("tag.setName(\"test\");");

    out.println("com.caucho.jsp.cfg.TldAttribute attr;");
    for (int i = 0; i < _attributes.size(); i++) {
      TldAttribute attr = _attributes.get(i);

      out.println("attr = new com.caucho.jsp.cfg.TldAttribute();");
      out.println("attr.setName(\"" + attr.getName() + "\");");

      Class type = attr.getType();
      if (type != null) {
        out.print("attr.setType(");
	out.printClass(type);
	out.println(".class);");
      }
      out.println("attr.setRtexprvalue(" + attr.getRtexprvalue() + ");");
      out.println("attr.setRequired(" + attr.getRequired() + ");");

      if (attr.getDeferredValue() != null) {
	out.println("attr.setDeferredValue(new com.caucho.jsp.cfg.TldAttribute.DeferredValue());");

	if (attr.getDeferredValue().getType() != null) {
	  out.print("attr.getDeferredValue().setType(\"");
	  out.printJavaString(attr.getDeferredValue().getType());
	  out.println("\");");
	}
      }

      if (attr.getDeferredMethod() != null) {
	out.println("attr.setDeferredMethod(new com.caucho.jsp.cfg.TldAttribute.DeferredMethod());");

	Signature sig = attr.getDeferredMethod().getMethodSignature();
	
	if (sig != null) {
	  out.print("attr.getDeferredMethod().setMethodSignature(");
	  out.print("new com.caucho.config.types.Signature(\"");
	  out.printJavaString(sig.getSignature());
	  out.println("\"));");
	}
      }

      out.println("tag.addAttribute(attr);");
    }

    out.println("com.caucho.jsp.cfg.TldVariable var;");
    for (int i = 0; i < _variables.size(); i++) {
      TldVariable var = _variables.get(i);

      out.println("var = new com.caucho.jsp.cfg.TldVariable();");

      if (var.getNameGiven() != null)
	out.println("var.setNameGiven(\"" + var.getNameGiven() + "\");");
      
      if (var.getNameFromAttribute() != null)
	out.println("var.setNameFromAttribute(\"" + var.getNameFromAttribute() + "\");");

      String type = var.getVariableClass();
      if (type != null)
        out.println("var.setVariableClass(\"" + type + "\");");
      out.println("var.setDeclare(" + var.getDeclare() + ");");
      if (var.getScope() != null)
	out.println("var.setScope(\"" + var.getScope() + "\");");

      out.println("tag.addVariable(var);");
    }
    
    String bodyContent = _bodyContent;
    if (bodyContent == null)
      bodyContent = "scriptless";

    out.println("return new com.caucho.jsp.java.TagInfoExt(tag.getName(),");
    out.println("                   getClass().getName(),");
    out.println("                   \"" + bodyContent + "\",");
    out.print("                   \"");
    if (_description != null)
      out.printJavaString(_description);
    else
      out.printJavaString("A simple tag");
    out.println("\",");
    out.println("                   taglib,");
    out.println("                   null,");
    out.println("                   tag.getAttributes(),");
    
    if (_displayName != null) {
      out.print("                   \"");
      out.printJavaString(_displayName);
      out.println("\",");
    }
    else {
      out.println("                   null,");
    }
    
    if (_smallIcon != null) {
      out.print("                   \"");
      out.printJavaString(_smallIcon);
      out.println("\",");
    }
    else {
      out.println("                   null,");
    }
    
    if (_largeIcon != null) {
      out.print("                   \"");
      out.printJavaString(_largeIcon);
      out.println("\",");
    }
    else {
      out.println("                   null,");
    }
    
    out.println("                   tag.getVariables(),");
    out.println("                   " + (_dynamicAttributes != null) + ",");
    if (_dynamicAttributes != null)
      out.println("                   \"" + _dynamicAttributes + "\",");
    else
      out.println("                   null,");
    out.println("                   _caucho_depends);");

    out.popDepth();
    out.println("}");
    
    out.println();
    out.println("public String _caucho_getDynamicAttributes()");
    out.println("{");
    out.pushDepth();

    if (_dynamicAttributes != null)
      out.println("return \"" + _dynamicAttributes + "\";");
    else
      out.println("return null;");
    
    out.popDepth();
    out.println("}");

    generateTagLibrary(out);
  }
  
  /**
   * Generates the attribute definitions.
   *
   * @param out the writer to the .java source
   */
  protected void generateTagLibrary(JspJavaWriter out)
    throws IOException, JspParseException
  {
    out.println();
    out.println("private javax.servlet.jsp.tagext.TagLibraryInfo _caucho_getTagLibrary()");
    out.println("  throws com.caucho.config.ConfigException");
    out.println("{");
    out.pushDepth();

    out.println("return new com.caucho.jsp.java.TagTaglib(\"x\", \"http://test.com\");");
    out.popDepth();
    out.println("}");
  }

  private String toFieldName(String name)
  {
    if (hasScripting() && ! _reserved.contains(name))
      return name;
    else
      return "_" + name;
  }

  static {
    _reserved.add("public");
    _reserved.add("private");
    _reserved.add("protected");
    _reserved.add("static");
    _reserved.add("final");
    _reserved.add("class");
    _reserved.add("interface");
    _reserved.add("extends");
    _reserved.add("implements");
    _reserved.add("package");
    _reserved.add("import");
    _reserved.add("new");
    _reserved.add("if");
    _reserved.add("else");
    _reserved.add("for");
    _reserved.add("do");
    _reserved.add("while");
    _reserved.add("break");
    _reserved.add("continue");
    _reserved.add("switch");
    _reserved.add("case");
    _reserved.add("default");
    _reserved.add("throw");
    _reserved.add("enum");
    _reserved.add("throws");
    
    _reserved.add("void");
    _reserved.add("boolean");
    _reserved.add("byte");
    _reserved.add("char");
    _reserved.add("short");
    _reserved.add("int");
    _reserved.add("long");
    _reserved.add("float");
    _reserved.add("double");
  }
}