org.mvel2
Class ParserContext

java.lang.Object
  org.mvel2.ParserContext

All Implemented Interfaces:

java.io.Serializable

public class ParserContext
extends java.lang.Object
implements java.io.Serializable

The ParserContext is the main enviroment object used for sharing state throughout the entire parser/compile 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







Constructor Summary
ParserContext()



           
ParserContext(boolean debugSymbols)



           
ParserContext(java.util.Map<java.lang.String,java.lang.Object> imports,
              java.util.Map<java.lang.String,Interceptor> interceptors,
              java.lang.String sourceFile)



           
ParserContext(java.lang.Object rootParser)



           
ParserContext(ParserConfiguration parserConfiguration)



           
 



Method Summary




 void
addError(ErrorDetail errorDetail)



           



 void
addImport(java.lang.Class cls)



          Adds an import for the specified Class.



 void
addImport(java.lang.String name,
          java.lang.Class cls)



          Adds an import for a specified Class using an alias.



 void
addImport(java.lang.String name,
          java.lang.reflect.Method method)



          Adds an import for a specified Method representing a static method import using an alias.



 void
addImport(java.lang.String name,
          MethodStub method)



          Adds a static import for the specified MethodStub with an alias.



 void
addIndexedVariable(java.lang.String variable)



           



 void
addIndexedVariables(java.util.Collection<java.lang.String> variables)



           



 void
addIndexedVariables(java.lang.String[] variables)



           



 void
addInput(java.lang.String name,
         java.lang.Class type)



           



 void
addInput(java.lang.String name,
         java.lang.Class type,
         java.lang.Class[] typeParameters)



           



 void
addInputs(java.util.Map<java.lang.String,java.lang.Class> inputs)



           



 void
addKnownLine(int lineNumber)



           



 void
addKnownLine(java.lang.String sourceName,
             int lineNumber)



           



 void
addPackageImport(java.lang.String packageName)



          Adds a package import to a parse session.



 void
addVariable(java.lang.String name,
            java.lang.Class type)



           



 void
addVariable(java.lang.String name,
            java.lang.Class type,
            boolean failIfNewAssignment)



           



 void
addVariables(java.util.Map<java.lang.String,java.lang.Class> variables)



           



 void
declareFunction(Function function)



           



 java.util.List<ErrorDetail>
getErrorList()



           



 Function
getFunction(java.lang.String name)



           



 java.util.Map
getFunctions()



           



 java.lang.Class
getImport(java.lang.String name)



          Get an import that has been declared, either in the parsed script or programatically



 java.util.Map<java.lang.String,java.lang.Object>
getImports()



           



 java.util.ArrayList<java.lang.String>
getIndexedVariables()



           



 java.util.Map<java.lang.String,java.lang.Class>
getInputs()



           



 java.util.Map<java.lang.String,Interceptor>
getInterceptors()



           



 LineLabel
getLastLineLabel()



           



 java.lang.reflect.Type[]
getLastTypeParameters()



           



 int
getLineCount()



          Get total number of lines declared in the current context.



 int
getLineOffset()



          Get the current line offset.



 ParserConfiguration
getParserConfiguration()



           



 java.lang.Object
getRootParser()



           



 java.lang.String
getSourceFile()



           



 MethodStub
getStaticImport(java.lang.String name)



          Get a MethodStub which wraps a static method import.



 java.lang.Object
getStaticOrClassImport(java.lang.String name)



          Returns either an instance of Class or MethodStub (whichever matches).



 java.util.Map<java.lang.String,java.lang.Class>
getTypeParameters(java.lang.String name)



           



 java.lang.reflect.Type[]
getTypeParametersAsArray(java.lang.String name)



           



 java.util.HashMap<java.lang.String,java.lang.Class>
getVariables()



           



 java.lang.Class
getVarOrInputType(java.lang.String name)



          Return the variable or input type froom the current parser context.



 boolean
hasFunction()



           



 boolean
hasFunction(java.lang.String name)



           



 boolean
hasImport(java.lang.String name)



          Tests to see if the specified import exists.



 boolean
hasImports()



           



 boolean
hasIndexedVariables()



           



 boolean
hasVarOrInput(java.lang.String name)



          Tests whether or not a variable or input exists in the current parser context.



 int
incrementLineCount(int increment)



          Increments the current line count by the specified amount



 void
initializeTables()



          Initializes internal Maps.



 boolean
isAllowBootstrapBypass()



           



 boolean
isBlockSymbols()



           



 boolean
isCompiled()



           



 boolean
isDebugSymbols()



           



 boolean
isExecutableCodeReached()



           



 boolean
isFatalError()



           



 boolean
isIndexAllocation()



           



 boolean
isKnownLine(java.lang.String sourceName,
            int lineNumber)



           



 boolean
isRetainParserState()



           



 boolean
isStrictTypeEnforcement()



           



 boolean
isStrongTyping()



           



 void
processTables()



           



 void
setAllowBootstrapBypass(boolean allowBootstrapBypass)



           



 void
setBlockSymbols(boolean blockSymbols)



           



 void
setCompiled(boolean compiled)



           



 void
setDebugSymbols(boolean debugSymbols)



           



 void
setErrorList(java.util.List<ErrorDetail> errorList)



           



 void
setExecutableCodeReached(boolean executableCodeReached)



           



 void
setFatalError(boolean fatalError)



           



 void
setImports(java.util.Map<java.lang.String,java.lang.Object> imports)



           



 void
setIndexAllocation(boolean indexAllocation)



           



 void
setInputs(java.util.Map<java.lang.String,java.lang.Class> inputs)



           



 void
setInterceptors(java.util.Map<java.lang.String,Interceptor> interceptors)



           



 LineLabel
setLastLineLabel(LineLabel lastLineLabel)



           



 void
setLastTypeParameters(java.lang.reflect.Type[] lastTypeParameters)



           



 void
setLineAndOffset(int lineCount,
                 int lineOffset)



          Sets both the current line count and line offset



 int
setLineCount(int lineCount)



          Set the current number of lines in the current context.



 void
setLineOffset(short lineOffset)



          Sets the current line offset.



 void
setRetainParserState(boolean retainParserState)



           



 void
setRootParser(java.lang.Object rootParser)



           



 void
setSourceFile(java.lang.String sourceFile)



           



 void
setStrictTypeEnforcement(boolean strictTypeEnforcement)



          Enables strict type enforcement



 void
setStrongTyping(boolean strongTyping)



          Enables strong type enforcement.



 void
setVariables(java.util.HashMap<java.lang.String,java.lang.Class> variables)



           



 int
variableIndexOf(java.lang.String name)



           


 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 





Constructor Detail



ParserContext
public ParserContext()





ParserContext
public ParserContext(boolean debugSymbols)





ParserContext
public ParserContext(java.lang.Object rootParser)





ParserContext
public ParserContext(ParserConfiguration parserConfiguration)





ParserContext
public ParserContext(java.util.Map<java.lang.String,java.lang.Object> imports,
                     java.util.Map<java.lang.String,Interceptor> interceptors,
                     java.lang.String sourceFile)






Method Detail



hasVarOrInput
public boolean hasVarOrInput(java.lang.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 java.lang.Class getVarOrInputType(java.lang.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





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(short 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 java.lang.Class getImport(java.lang.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(java.lang.String name)

Get a MethodStub which wraps a static method import.





Parameters:
name - The name identifier
Returns:
An instance of MethodStub





getStaticOrClassImport
public java.lang.Object getStaticOrClassImport(java.lang.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(java.lang.String packageName)

Adds a package import to a parse session.





Parameters:
packageName - A fully qualified package (eg. java.util.concurrent).





hasImport
public boolean hasImport(java.lang.String name)

Tests to see if the specified import exists.





Parameters:
name - A name identifier
Returns:
boolean





addImport
public void addImport(java.lang.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(java.lang.String name,
                      java.lang.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(java.lang.String name,
                      java.lang.reflect.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.





addImport
public void addImport(java.lang.String name,
                      MethodStub method)

Adds a static import for the specified MethodStub with an alias.





Parameters:
name - The alias to use
method - The instance of Method which represents the static import.
See Also:
addImport(String, org.mvel2.util.MethodStub)





initializeTables
public void initializeTables()

Initializes internal Maps.  Called by the compiler.











addVariable
public void addVariable(java.lang.String name,
                        java.lang.Class type,
                        boolean failIfNewAssignment)











addVariable
public void addVariable(java.lang.String name,
                        java.lang.Class type)











addVariables
public void addVariables(java.util.Map<java.lang.String,java.lang.Class> variables)











addInput
public void addInput(java.lang.String name,
                     java.lang.Class type)











addInput
public void addInput(java.lang.String name,
                     java.lang.Class type,
                     java.lang.Class[] typeParameters)











addInputs
public void addInputs(java.util.Map<java.lang.String,java.lang.Class> inputs)











processTables
public void processTables()











getInputs
public java.util.Map<java.lang.String,java.lang.Class> getInputs()











setInputs
public void setInputs(java.util.Map<java.lang.String,java.lang.Class> inputs)











getErrorList
public java.util.List<ErrorDetail> getErrorList()











setErrorList
public void setErrorList(java.util.List<ErrorDetail> errorList)











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 java.lang.Object getRootParser()











setRootParser
public void setRootParser(java.lang.Object rootParser)











getSourceFile
public java.lang.String getSourceFile()











setSourceFile
public void setSourceFile(java.lang.String sourceFile)











getInterceptors
public java.util.Map<java.lang.String,Interceptor> getInterceptors()











setInterceptors
public void setInterceptors(java.util.Map<java.lang.String,Interceptor> interceptors)











getImports
public java.util.Map<java.lang.String,java.lang.Object> getImports()











setImports
public void setImports(java.util.Map<java.lang.String,java.lang.Object> imports)











getVariables
public java.util.HashMap<java.lang.String,java.lang.Class> getVariables()











setVariables
public void setVariables(java.util.HashMap<java.lang.String,java.lang.Class> variables)











isCompiled
public boolean isCompiled()











setCompiled
public void setCompiled(boolean compiled)











isDebugSymbols
public boolean isDebugSymbols()











setDebugSymbols
public void setDebugSymbols(boolean debugSymbols)











isKnownLine
public boolean isKnownLine(java.lang.String sourceName,
                           int lineNumber)











addKnownLine
public void addKnownLine(java.lang.String sourceName,
                         int lineNumber)











addKnownLine
public void addKnownLine(int lineNumber)











getLastLineLabel
public LineLabel getLastLineLabel()











setLastLineLabel
public LineLabel setLastLineLabel(LineLabel lastLineLabel)











hasImports
public boolean hasImports()











declareFunction
public void declareFunction(Function function)











getFunction
public Function getFunction(java.lang.String name)











getFunctions
public java.util.Map getFunctions()











hasFunction
public boolean hasFunction(java.lang.String name)











hasFunction
public boolean hasFunction()











getTypeParameters
public java.util.Map<java.lang.String,java.lang.Class> getTypeParameters(java.lang.String name)











getTypeParametersAsArray
public java.lang.reflect.Type[] getTypeParametersAsArray(java.lang.String name)











isBlockSymbols
public boolean isBlockSymbols()











setBlockSymbols
public void setBlockSymbols(boolean blockSymbols)











isExecutableCodeReached
public boolean isExecutableCodeReached()











setExecutableCodeReached
public void setExecutableCodeReached(boolean executableCodeReached)











getIndexedVariables
public java.util.ArrayList<java.lang.String> getIndexedVariables()











addIndexedVariables
public void addIndexedVariables(java.lang.String[] variables)











addIndexedVariable
public void addIndexedVariable(java.lang.String variable)











addIndexedVariables
public void addIndexedVariables(java.util.Collection<java.lang.String> variables)











variableIndexOf
public int variableIndexOf(java.lang.String name)











hasIndexedVariables
public boolean hasIndexedVariables()











isIndexAllocation
public boolean isIndexAllocation()











setIndexAllocation
public void setIndexAllocation(boolean indexAllocation)











getParserConfiguration
public ParserConfiguration getParserConfiguration()











getLastTypeParameters
public java.lang.reflect.Type[] getLastTypeParameters()











setLastTypeParameters
public void setLastTypeParameters(java.lang.reflect.Type[] lastTypeParameters)











isAllowBootstrapBypass
public boolean isAllowBootstrapBypass()











setAllowBootstrapBypass
public void setAllowBootstrapBypass(boolean allowBootstrapBypass)