Package org.mvel2

Class ParserContext

  • All Implemented Interfaces:
    Serializable
    public class ParserContext
extends Object
implements Serializable
    The ParserContext is the main environment object used for sharing state throughout the entire parser/compileShared process. The ParserContext is used to configure the parser/compiler. For example: 
    
 ParserContext parserContext = new ParserContext();
 parserContext.setStrongTyping(true); // turn on strong typing.

 Serializable comp = MVEL.compileExpression("foo.bar", parserContext);
    See Also:
    Serialized Form

    • Field Detail

      • variablesEscape

        protected boolean variablesEscape

    • Method Detail

      • createColoringSubcontext

        public ParserContext createColoringSubcontext()

      • hasVarOrInput

        public boolean hasVarOrInput​(String name)
        Tests whether or not a variable or input exists in the current parser context.
        Parameters:
        name - The name of the identifier.
        Returns:
        boolean

      • getVarOrInputType

        public Class getVarOrInputType​(String name)
        Return the variable or input type froom the current parser context. Returns Object.class if the type cannot be determined.
        Parameters:
        name - The name of the identifier
        Returns:
        boolean

      • getVarOrInputTypeOrNull

        public Class getVarOrInputTypeOrNull​(String name)

      • getLineCount

        public int getLineCount()
        Get total number of lines declared in the current context.
        Returns:
        int of lines

      • setLineCount

        public int setLineCount​(int lineCount)
        Set the current number of lines in the current context. (Generally only used by the compiler)
        Parameters:
        lineCount - The number of lines
        Returns:
        int of lines

      • incrementLineCount

        public int incrementLineCount​(int increment)
        Increments the current line count by the specified amount
        Parameters:
        increment - The number of lines to increment
        Returns:
        int of lines

      • getLineOffset

        public int getLineOffset()
        Get the current line offset. This measures the number of cursor positions back to the beginning of the line.
        Returns:
        int offset

      • setLineOffset

        public void setLineOffset​(int lineOffset)
        Sets the current line offset. (Generally only used by the compiler)
        Parameters:
        lineOffset - The offset amount

      • setLineAndOffset

        public void setLineAndOffset​(int lineCount,
                             int lineOffset)
        Sets both the current line count and line offset
        Parameters:
        lineCount - The line count
        lineOffset - The line offset

      • getImport

        public Class getImport​(String name)
        Get an import that has been declared, either in the parsed script or programatically
        Parameters:
        name - The name identifier for the imported class (ie. "HashMap")
        Returns:
        An instance of Class denoting the imported class.

      • getStaticImport

        public MethodStub getStaticImport​(String name)
        Get a MethodStub which wraps a static method import.
        Parameters:
        name - The name identifier
        Returns:
        An instance of MethodStub

      • getStaticOrClassImport

        public Object getStaticOrClassImport​(String name)
        Returns either an instance of Class or MethodStub (whichever matches).
        Parameters:
        name - The name identifier.
        Returns:
        An instance of Class or MethodStub

      • addPackageImport

        public void addPackageImport​(String packageName)
        Adds a package import to a parse session.
        Parameters:
        packageName - A fully qualified package (eg. java.util.concurrent).

      • hasImport

        public boolean hasImport​(String name)
        Tests to see if the specified import exists.
        Parameters:
        name - A name identifier
        Returns:
        boolean

      • hasProtoImport

        public boolean hasProtoImport​(String name)

      • getProtoImport

        public Proto getProtoImport​(String name)

      • addImport

        public void addImport​(Class cls)
        Adds an import for the specified Class.
        Parameters:
        cls - The instance of the Class which represents the imported class.

      • addImport

        public void addImport​(Proto proto)

      • addImport

        public void addImport​(String name,
                      Class cls)
        Adds an import for a specified Class using an alias. For example: 
        
 parserContext.addImport("sys", System.class);
        ... doing this would allow an MVEL script to be written as such: 
        
 sys.currentTimeMillis();
        Parameters:
        name - The alias to use
        cls - The instance of the Class which represents the imported class.

      • addImport

        public void addImport​(String name,
                      Method method)
        Adds an import for a specified Method representing a static method import using an alias. For example: 
        
 parserContext.addImport("time", MVEL.getStaticMethod(System.class, "currentTimeMillis", new Class[0]));
        ... doing this allows the System.currentTimeMillis() method to be executed in a script simply by writing time().
        Parameters:
        name - The alias to use
        method - The instance of Method which represents the static import.

      • initializeTables

        public void initializeTables()
        Initializes internal Maps. Called by the compiler.

      • addVariable

        public void addVariable​(String name,
                        Class type,
                        boolean failIfNewAssignment)

      • addVariable

        public void addVariable​(String name,
                        Class type)

      • addVariables

        public void addVariables​(Map<String,​Class> variables)

      • addInput

        public void addInput​(String name,
                     Class type)

      • addInput

        public void addInput​(String name,
                     Class type,
                     Class[] typeParameters)

      • processTables

        public void processTables()

      • addError

        public void addError​(ErrorDetail errorDetail)

      • isFatalError

        public boolean isFatalError()

      • setFatalError

        public void setFatalError​(boolean fatalError)

      • isStrictTypeEnforcement

        public boolean isStrictTypeEnforcement()

      • setStrictTypeEnforcement

        public void setStrictTypeEnforcement​(boolean strictTypeEnforcement)
        Enables strict type enforcement -
        Parameters:
        strictTypeEnforcement - -

      • isStrongTyping

        public boolean isStrongTyping()

      • setStrongTyping

        public void setStrongTyping​(boolean strongTyping)
        Enables strong type enforcement.
        Parameters:
        strongTyping - -

      • isRetainParserState

        public boolean isRetainParserState()

      • setRetainParserState

        public void setRetainParserState​(boolean retainParserState)

      • getRootParser

        public Parser getRootParser()

      • setRootParser

        public void setRootParser​(Parser rootParser)

      • getSourceFile

        public String getSourceFile()

      • setSourceFile

        public void setSourceFile​(String sourceFile)

      • pushVariableScope

        public void pushVariableScope()

      • popVariableScope

        public void popVariableScope()

      • makeVisible

        public void makeVisible​(String var)

      • getVariableScope

        public Set<String> getVariableScope()

      • isVariableVisible

        public boolean isVariableVisible​(String var)

      • isCompiled

        public boolean isCompiled()

      • setCompiled

        public void setCompiled​(boolean compiled)

      • isDebugSymbols

        public boolean isDebugSymbols()

      • setDebugSymbols

        public void setDebugSymbols​(boolean debugSymbols)

      • isLineMapped

        public boolean isLineMapped​(String sourceName)

      • initLineMapping

        public void initLineMapping​(String sourceName,
                            char[] expr)

      • getLineFor

        public int getLineFor​(String sourceName,
                      int cursor)

      • isVisitedLine

        public boolean isVisitedLine​(String sourceName,
                             int lineNumber)

      • visitLine

        public void visitLine​(String sourceName,
                      int lineNumber)

      • getLastLineLabel

        public LineLabel getLastLineLabel()

      • hasImports

        public boolean hasImports()

      • declareFunction

        public void declareFunction​(Function function)

      • getFunctions

        public Map getFunctions()

      • hasFunction

        public boolean hasFunction​(String name)

      • hasFunction

        public boolean hasFunction()

      • getTypeParametersAsArray

        public Type[] getTypeParametersAsArray​(String name)

      • isBlockSymbols

        public boolean isBlockSymbols()

      • setBlockSymbols

        public void setBlockSymbols​(boolean blockSymbols)

      • isVariablesEscape

        public boolean isVariablesEscape()

      • isExecutableCodeReached

        public boolean isExecutableCodeReached()

      • setExecutableCodeReached

        public void setExecutableCodeReached​(boolean executableCodeReached)

      • optimizationNotify

        public void optimizationNotify()

      • isOptimizerNotified

        public boolean isOptimizerNotified()

      • addIndexedInput

        public void addIndexedInput​(String[] variables)

      • addIndexedLocals

        public void addIndexedLocals​(String[] variables)

      • addIndexedLocals

        public void addIndexedLocals​(Collection<String> variables)

      • addIndexedInput

        public void addIndexedInput​(String variable)

      • addIndexedInputs

        public void addIndexedInputs​(Collection<String> variables)

      • variableIndexOf

        public int variableIndexOf​(String name)

      • getEvaluationContext

        public Object getEvaluationContext()

      • hasIndexedInputs

        public boolean hasIndexedInputs()

      • isIndexAllocation

        public boolean isIndexAllocation()

      • setIndexAllocation

        public void setIndexAllocation​(boolean indexAllocation)

      • isFunctionContext

        public boolean isFunctionContext()

      • getLastTypeParameters

        public Type[] getLastTypeParameters()

      • setLastTypeParameters

        public void setLastTypeParameters​(Type[] lastTypeParameters)

      • isAllowBootstrapBypass

        public boolean isAllowBootstrapBypass()

      • setAllowBootstrapBypass

        public void setAllowBootstrapBypass​(boolean allowBootstrapBypass)

      • getIndexedVarNames

        public String[] getIndexedVarNames()

      • getReturnTypeCache

        public Map<String,​Class> getReturnTypeCache()