Package com.tangosol.coherence.rest.util

Class MvelHelper

java.lang.Object
com.tangosol.coherence.rest.util.MvelHelper
public class MvelHelper extends Object
Enable Mvel to be optional by only accessing module via reflection with implementation provided on classpath. org.mvel.mvel2 module is removed by default for security reasons, but one can override and have backwards compatible support by adding the mvel module to the path.
Since:
12.2.1.3.18
Author:
jf 2022/01/19

  • Field Details

    • s_fEnabled

      public static final boolean s_fEnabled
      True iff mvel2 jar is on classpath and all reflection lookups succeeded.

    • s_clzMVEL

      public static final Class<?> s_clzMVEL
      Reflection lookup of class org.mvel2.MVEL.

    • s_clzParserContext

      public static final Class<?> s_clzParserContext
      Reflection lookup of class org.mvel2.ParserContext.

    • HANDLE_PARSER_CONTEXT_ADD_PACKAGE_IMPORT

      public static final MethodHandle HANDLE_PARSER_CONTEXT_ADD_PACKAGE_IMPORT
      MethodHandle for method addPackageImport(String) from org.mvel2.ParserContext.

    • HANDLE_PARSER_CONTEXT_GET_PARSER_CONFIGURATION

      public static final MethodHandle HANDLE_PARSER_CONTEXT_GET_PARSER_CONFIGURATION
      MethodHandle for method getParserConfiguration() from org.mvel2.ParserContext.

    • HANDLE_PARSER_CONFIGURATION_SET_CLASS_LOADER

      public static final MethodHandle HANDLE_PARSER_CONFIGURATION_SET_CLASS_LOADER
      MethodHandle for method setClassLoader() from org.mvel2.ParserConfiguration.

    • HANDLE_COMPILE_EXPRESSION

      public static final MethodHandle HANDLE_COMPILE_EXPRESSION
      MethodHandle for method compileExpression(String expr, ParserContext ctx) from org.mvel2.MVEL.

    • HANDLE_EXECUTE_EXPRESSION

      public static final MethodHandle HANDLE_EXECUTE_EXPRESSION
      MethodHandle for method executeExpression(Object compiledExpr, Object ctx) from org.mvel2.MVEL.

    • HANDLE_COMPILE_SET_EXPRESSION

      public static final MethodHandle HANDLE_COMPILE_SET_EXPRESSION
      MethodHandle for method compileSetExpression(String expr, ParserContext ctx) from org.mvel2.MVEL.

    • HANDLE_EXECUTE_SET_EXPRESSION

      public static final MethodHandle HANDLE_EXECUTE_SET_EXPRESSION
      MethodHandle for method executeSetExpression(Serializable compiledExpr, Object ctx, Object value) from org.mvel2.MVEL.

  • Constructor Details

    • MvelHelper

      public MvelHelper()

  • Method Details

    • isEnabled

      public static boolean isEnabled()
      Return true if optional org.mvel.mvel2 module is loaded from path. Due to security concerns, Mvel is removed from default implementation and only optionally available for backwards compatibility mode.
      Returns:
      true if mvel implementation is available

    • getMvelParserContext

      public static Object getMvelParserContext()
      Return an instance of ParserContext to be used for MVEL compilation.
      Returns:
      an instance of ParserContext to be used for MVEL compilation

    • compileExpression

      public static Serializable compileExpression(String sExpr, Object ctx)
      Compile sExpr within ParserContext ctx.
      Parameters:
      sExpr - expression
      ctx - ParserContext
      Returns:
      a Serializable compiled expression

    • executeExpression

      public static Object executeExpression(Object compiledExpr, Object oTarget)
      Executes a compiledExpression against target.
      Parameters:
      compiledExpr - compiled expression to select data from target
      oTarget - target object
      Returns:
      the extracted data from oTarget

    • compileSetExpression

      public static Serializable compileSetExpression(String sExpr, Object ctx)
      Compile sExpr using ParserContext ctx.
      Parameters:
      sExpr - expression
      ctx - ParserContext
      Returns:
      a Serializable compiled expression

    • executeSetExpression

      public static void executeSetExpression(Serializable compiledSet, Object oTarget, Object oValue)
      Set property referenced by compiledSet expression in oTarget to Ovalue..
      Parameters:
      compiledSet - result of compileSetExpression(String, Object)
      oTarget - object to be updated
      oValue - value to update the computed property