Examples of com.caucho.xpath.Env

com.caucho.xpath.Env
Global and local variable environment. The April XSLT draft introduces global and local variables. The Env class contains those bindings.
Because this class exists only to support XSL, it makes a number of assumptions that would be invalid for a typical API. Specifically, the variable names must be interned strings, i.e. variable matching uses '==', not equals.
Local variables are handled like a stack. They are pushed and popped as necessary. The top variables shadow bottom variables.
In other words, although the API somewhat resembles a HashMap, it can't be used as a generic hash map.

  public static Object evalObject(PageContextImpl pageContext,
          com.caucho.xpath.Expr select)
    throws XPathException, JspException
  {
    try {
      Env env = XPath.createEnv();
      env.setVarEnv(pageContext.getVarEnv());
      
      Node node = pageContext.getNodeEnv();
      
      Object value = select.evalObject(node, env);


      env.free();


      return value;
    } catch (javax.el.ELException e) {
      throw new JspException(e);
    }

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  public int doStartTag()
    throws JspException
  {
    try {
      PageContextImpl pageContext = (PageContextImpl) this.pageContext;
      Env env = XPath.createEnv();
      env.setVarEnv(pageContext.getVarEnv());
      
      _oldEnv = pageContext.getNodeEnv();
      Object obj = _select.evalObject(_oldEnv, env);


      env.free();


      if (obj == null)
        return SKIP_BODY;


      if (obj instanceof Iterator)

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    addFunction("document", new DocumentFun(transformer));
    DocumentFun docFun = new DocumentFun(transformer);
    docFun.setHtml(true);
    addFunction("html_document", docFun);


    Env env = XPath.createEnv();
    env.setFunctions(_funs);
    StylesheetEnv ssEnv = new StylesheetEnv();
    ssEnv.setPath(getPath());
    env.setStylesheetEnv(ssEnv);


    out.disableEscaping(_defaultDisableEscaping);


    if (_strip != null && ! _strip.isEmpty()) {
      stripSpaces(xml);

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      JspWriter out = pageContext.getOut();


      Node node = pageContext.getNodeEnv();


      Env env = XPath.createEnv();
      env.setVarEnv(pageContext.getVarEnv());


      String value = _select.evalString(node, env);


      env.free();


      if (_escapeXml)
        com.caucho.el.Expr.toStreamEscaped(out, value);
      else
        out.print(value);

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    // Match patterns need to use a more complicated test.
    if (! (env instanceof Env))
      throw new RuntimeException(String.valueOf(env));
    
    Env globalEnv = (Env) env;
    boolean oldMorePositions = globalEnv.setMorePositions(true);
    int oldIndex = globalEnv.setPositionIndex(0);
    try {
      for (int i = 0; globalEnv.hasMorePositions(); i++) {
        globalEnv.setPositionIndex(i);
        globalEnv.setMorePositions(false);


        if (_expr.isNumber()) {
          double test = _expr.evalNumber(node, env);
          double position = _parent.position(node, globalEnv,
               _parent.copyPosition());


          if (position == test)
            return true;
        }
  else if (_expr.isBoolean()) {
    if (_expr.evalBoolean(node, env))
      return true;
  }
  else {
    Object value = _expr.evalObject(node, env);


    if (value instanceof Number) {
      double test = ((Number) value).doubleValue();
      double position = _parent.position(node, globalEnv,
                 _parent.copyPosition());


      if (position == test)
        return true;
    }
    else if (Expr.toBoolean(value))
      return true;
  }
      }


      return false;
    } finally {
      globalEnv.setPositionIndex(oldIndex);
      globalEnv.setMorePositions(oldMorePositions);
    }
  }

View Full Code Here


    // Match patterns need to use a more complicated test.
    if (! (env instanceof Env))
      throw new RuntimeException(String.valueOf(env));
    
    Env globalEnv = (Env) env;
    boolean oldMorePositions = globalEnv.setMorePositions(true);
    int oldIndex = globalEnv.setPositionIndex(0);
    try {
      for (int i = 0; globalEnv.hasMorePositions(); i++) {
        globalEnv.setPositionIndex(i);
        globalEnv.setMorePositions(false);


        if (_expr.isNumber()) {
          double test = _expr.evalNumber(node, env);
          double position = _parent.position(node, globalEnv,
                                             _parent.copyPosition());


          if (position == test)
            return true;
        }
        else if (_expr.isBoolean()) {
          if (_expr.evalBoolean(node, env))
            return true;
        }
        else {
          Object value = _expr.evalObject(node, env);


          if (value instanceof Number) {
            double test = ((Number) value).doubleValue();
            double position = _parent.position(node, globalEnv,
                                               _parent.copyPosition());


            if (position == test)
              return true;
          }
          else if (Expr.toBoolean(value))
            return true;
        }
      }


      return false;
    } finally {
      globalEnv.setPositionIndex(oldIndex);
      globalEnv.setMorePositions(oldMorePositions);
    }
  }

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com.caucho.jstl.el.XmlIfTag

com.caucho.jstl.el.XmlOutTag

com.caucho.jstl.el.XmlSetTag

com.caucho.jstl.el.XmlWhenTag

com.caucho.jstl.rt.XmlOutTag

com.caucho.xpath.expr.ObjectVar

com.caucho.xpath.expr.Var

com.caucho.xpath.pattern.AbstractPattern

com.caucho.xpath.pattern.FilterPattern

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