Lỗi javax.el.elexception failed to parse the expression

causes the following ParseException. It is a pathological pattern but was accepted before introducing lambda.

Caused by: javax.el.ELException: Error Parsing: ${(var)}
        at com.sun.el.lang.ExpressionBuilder.createNodeInternal(ExpressionBuilder.java:213)
        at com.sun.el.lang.ExpressionBuilder.build(ExpressionBuilder.java:237)
        at com.sun.el.lang.ExpressionBuilder.createValueExpression(ExpressionBuilder.java:295)
        at com.sun.el.ExpressionFactoryImpl.createValueExpression(ExpressionFactoryImpl.java:112)
        at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:916)
        at org.apache.jsp.test2_jsp._jspService(test2_jsp.java:96)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:433)
        ... 31 more
Caused by: com.sun.el.parser.ParseException: Encountered "}" at line 1, column 10.
Was expecting:
    "->" ...
        at com.sun.el.parser.ELParser.generateParseException(ELParser.java:2963)
        at com.sun.el.parser.ELParser.jj_consume_token(ELParser.java:2845)
        at com.sun.el.parser.ELParser.LambdaExpression(ELParser.java:295)
        at com.sun.el.parser.ELParser.Assignment(ELParser.java:226)
        at com.sun.el.parser.ELParser.SemiColon(ELParser.java:181)
        at com.sun.el.parser.ELParser.Expression(ELParser.java:174)
        at com.sun.el.parser.ELParser.DynamicExpression(ELParser.java:146)
        at com.sun.el.parser.ELParser.CompositeExpression(ELParser.java:43)
        at com.sun.el.lang.ExpressionBuilder.createNodeInternal(ExpressionBuilder.java:182)
        ... 39 more

The parser is trying to interpret it as LambdaParameters. Some other examples:

**Good**${var}
${-(var)}
${(3)*4}

Best Java code snippets using javax.servlet.jsp.el.ELException (Showing top 20 results out of 315)

@SuppressWarnings("rawtypes") protected Object doEvaluate(String expression, Class expectedType, javax.servlet.jsp.el.FunctionMapper functionMapper)

throws javax.servlet.jsp.el.ELException {

try {

return ExpressionEvaluatorManager.evaluate("JSP EL expression", expression, expectedType, this.pageContext);

} catch (JspException ex) {

throw new [javax.servlet.jsp.el.ELException](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/%3Cinit%3E)("Parsing of JSP EL expression \"" + expression + "\" failed", ex);

} }

@Override public Object getValue(ELContext context, Object base, Object property) { Objects.requireNonNull(context); if (base == null) {

context.setPropertyResolved(base, property);
if (property != null) {
  try {
    return this.variableResolver.resolveVariable(property
        .toString());
  } catch (javax.servlet.jsp.el.ELException e) {
    throw new ELException(e.[getMessage](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getMessage)(), e.[getCause](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getCause)());
  }
}

} if (!context.isPropertyResolved()) {

return elResolver.getValue(context, base, property);

} return null; }

} catch (ELException e) { throw new SCXMLExpressionException("eval('" + expr + "'):"

• e.getMessage(), e);

public Throwable getRootCause() { return getCause(); } }

@SuppressWarnings({"unchecked", "deprecation"}) public T evaluate(String expr, Class clazz) throws Exception { ELEvaluator existing = current.get(); try {

current.set(this);
return (T) evaluator.evaluate(expr, clazz, context, context);

} catch (ELException ex) {

if (ex.[getRootCause](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getRootCause)() instanceof Exception) {
  throw (Exception) ex.[getRootCause](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getRootCause)();
}
else {
  throw ex;
}

} finally {

current.set(existing);

} }

@Override public Class getType(ELContext context, Object base, Object property) { Objects.requireNonNull(context); if (base == null) {

context.setPropertyResolved(base, property);
if (property != null) {
  try {
    Object obj = this.variableResolver.resolveVariable(property
        .toString());
    return (obj != null) ? obj.getClass() : null;
  } catch (javax.servlet.jsp.el.ELException e) {
    throw new ELException(e.[getMessage](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getMessage)(), e.[getCause](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getCause)());
  }
}

} if (!context.isPropertyResolved()) {

return elResolver.getType(context, base, property);

} return null; }

public Boolean evalCond(final Context ctx, final String expr) throws SCXMLExpressionException { if (expr == null) {

return null;

} VariableResolver vr = null; if (ctx instanceof VariableResolver) {

vr = (VariableResolver) ctx;

} else {

vr = new ContextWrapper(ctx);

} try {

String evalExpr = inFct.matcher(expr).
  replaceAll("In(_ALL_STATES, ");
evalExpr = dataFct.matcher(evalExpr).
  replaceAll("Data(_ALL_NAMESPACES, ");
Boolean rslt = (Boolean) getEvaluator().evaluate(evalExpr,
  Boolean.class, vr, builtinFnMapper);
if (log.isDebugEnabled()) {
  log.debug(expr + " = " + String.valueOf(rslt));
}
return rslt;

} catch (ELException e) {

throw new SCXMLExpressionException("eval('" + expr + "'):"

• e.getMessage(), e); } }

public Throwable getRootCause() {

return [getCause](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getCause)();

} }

@SuppressWarnings({"unchecked", "deprecation"}) public T evaluate(String expr, Class clazz) throws Exception { ELEvaluator existing = current.get(); try {

current.set(this);
return (T) evaluator.evaluate(expr, clazz, context, context);

} catch (ELException ex) {

if (ex.[getRootCause](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getRootCause)() instanceof Exception) {
  throw (Exception) ex.[getRootCause](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getRootCause)();
}
else {
  throw ex;
}

} finally {

current.set(existing);

} }

@SuppressWarnings("rawtypes") protected Object doEvaluate(String expression, Class expectedType, javax.servlet.jsp.el.FunctionMapper functionMapper)

throws javax.servlet.jsp.el.ELException {

try {

return ExpressionEvaluatorManager.evaluate("JSP EL expression", expression, expectedType, this.pageContext);

} catch (JspException ex) {

throw new [javax.servlet.jsp.el.ELException](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/%3Cinit%3E)("Parsing of JSP EL expression \"" + expression + "\" failed", ex);

} }

@Override public Object getValue(ELContext context, Object base, Object property) { Objects.requireNonNull(context); if (base == null) {

context.setPropertyResolved(base, property);
if (property != null) {
  try {
    return this.variableResolver.resolveVariable(property
        .toString());
  } catch (javax.servlet.jsp.el.ELException e) {
    throw new ELException(e.[getMessage](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getMessage)(), e.[getCause](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getCause)());
  }
}

} if (!context.isPropertyResolved()) {

return elResolver.getValue(context, base, property);

} return null; }

0

@Override public Object getValue(ELContext context, Object base, Object property) { Objects.requireNonNull(context); if (base == null) {

context.setPropertyResolved(base, property);
if (property != null) {
  try {
    return this.variableResolver.resolveVariable(property
        .toString());
  } catch (javax.servlet.jsp.el.ELException e) {
    throw new ELException(e.[getMessage](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getMessage)(), e.[getCause](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getCause)());
  }
}

} if (!context.isPropertyResolved()) {

return elResolver.getValue(context, base, property);

} return null; }

1

@Override public Object getValue(ELContext context, Object base, Object property) { Objects.requireNonNull(context); if (base == null) {

context.setPropertyResolved(base, property);
if (property != null) {
  try {
    return this.variableResolver.resolveVariable(property
        .toString());
  } catch (javax.servlet.jsp.el.ELException e) {
    throw new ELException(e.[getMessage](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getMessage)(), e.[getCause](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getCause)());
  }
}

} if (!context.isPropertyResolved()) {

return elResolver.getValue(context, base, property);

} return null; }

2

@Override public Object getValue(ELContext context, Object base, Object property) { Objects.requireNonNull(context); if (base == null) {

context.setPropertyResolved(base, property);
if (property != null) {
  try {
    return this.variableResolver.resolveVariable(property
        .toString());
  } catch (javax.servlet.jsp.el.ELException e) {
    throw new ELException(e.[getMessage](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getMessage)(), e.[getCause](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getCause)());
  }
}

} if (!context.isPropertyResolved()) {

return elResolver.getValue(context, base, property);

} return null; }

3

@Override public Object getValue(ELContext context, Object base, Object property) { Objects.requireNonNull(context); if (base == null) {

context.setPropertyResolved(base, property);
if (property != null) {
  try {
    return this.variableResolver.resolveVariable(property
        .toString());
  } catch (javax.servlet.jsp.el.ELException e) {
    throw new ELException(e.[getMessage](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getMessage)(), e.[getCause](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getCause)());
  }
}

} if (!context.isPropertyResolved()) {

return elResolver.getValue(context, base, property);

} return null; }

4

} catch (ELException e) { throw new SCXMLExpressionException("eval('" + expr + "'):"

• e.getMessage(), e);

@Override public Object getValue(ELContext context, Object base, Object property) { Objects.requireNonNull(context); if (base == null) {

context.setPropertyResolved(base, property);
if (property != null) {
  try {
    return this.variableResolver.resolveVariable(property
        .toString());
  } catch (javax.servlet.jsp.el.ELException e) {
    throw new ELException(e.[getMessage](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getMessage)(), e.[getCause](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getCause)());
  }
}

} if (!context.isPropertyResolved()) {

return elResolver.getValue(context, base, property);

} return null; }

6

@Override public Object getValue(ELContext context, Object base, Object property) { Objects.requireNonNull(context); if (base == null) {

context.setPropertyResolved(base, property);
if (property != null) {
  try {
    return this.variableResolver.resolveVariable(property
        .toString());
  } catch (javax.servlet.jsp.el.ELException e) {
    throw new ELException(e.[getMessage](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getMessage)(), e.[getCause](https://www.tabnine.com/code/java/methods/javax.servlet.jsp.el.ELException/getCause)());
  }
}

} if (!context.isPropertyResolved()) {

return elResolver.getValue(context, base, property);

} return null; }

7