opendap.dap.parser
Class ExprParser
java.lang.Object
opendap.dap.parser.ExprParser
- All Implemented Interfaces:
- ExprParserConstants
public class ExprParser
- extends java.lang.Object
- implements ExprParserConstants
The constraint expression parser class.
Because it only makes sense to evaluate CEs when serving data, the
BaseTyeFactory must create instances of the SDtype classes, not
the Dtype classes. The is because we use the setRead method of the class
ServerMethods when creating constants (to ensure that the evaluator
doesn't try to read tem from the dataset!).
- Author:
- jhrg
Fields inherited from interface opendap.dap.parser.ExprParserConstants |
AMPERSAND, COLON, COMMA, DEFAULT, EOF, EQUAL, GREATER, GREATER_EQL, LBRACE, LBRACKET, LESS, LESS_EQL, LPAREN, NOT_EQUAL, RBRACE, RBRACKET, REGEXP, RPAREN, SEPARATOR, tokenImage, WORD |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
token_source
public ExprParserTokenManager token_source
token
public Token token
jj_nt
public Token jj_nt
lookingAhead
public boolean lookingAhead
ExprParser
public ExprParser(java.io.InputStream stream)
ExprParser
public ExprParser(java.io.InputStream stream,
java.lang.String encoding)
ExprParser
public ExprParser(java.io.Reader stream)
ExprParser
public ExprParser(ExprParserTokenManager tm)
constraint_expression
public final void constraint_expression(CEEvaluator ceEval,
BaseTypeFactory factory,
ClauseFactory clauseFactory)
throws ParseException,
NoSuchVariableException,
NoSuchFunctionException,
InvalidOperatorException,
DAP2Exception,
InvalidParameterException,
SBHException,
WrongTypeException
- This is the entry point for the Constraint expression parser.
Note that this method catches any ParserException and recasts it to a
DAP2Exception after replacing all double quotes with single quotes.
- Parameters:
ceEval
- A CEEvaluator instance where any select clauses will be
dumped and from which the DDS, which supplies the evaluation environment,
will be read.factory
- A BaseTypeFactory used to generate instances of variables
as needed (e.g., to hold values of constants).clauseFactory
- A ClauseFactory used to generate instances of each
type of clause.
- Throws:
ParseException
NoSuchVariableException
NoSuchFunctionException
InvalidOperatorException
DAP2Exception
InvalidParameterException
SBHException
WrongTypeException
selection
public final void selection()
throws ParseException,
NoSuchVariableException,
NoSuchFunctionException,
InvalidOperatorException,
ParseException,
SBHException,
DAP2Exception
- Throws:
ParseException
NoSuchVariableException
NoSuchFunctionException
InvalidOperatorException
SBHException
DAP2Exception
clause
public final Clause clause()
throws ParseException,
NoSuchVariableException,
NoSuchFunctionException,
InvalidOperatorException,
ParseException,
DAP2Exception
- Throws:
ParseException
NoSuchVariableException
NoSuchFunctionException
InvalidOperatorException
DAP2Exception
bool_function
public final Clause bool_function()
throws ParseException,
NoSuchVariableException,
NoSuchFunctionException,
InvalidOperatorException,
ParseException,
DAP2Exception
- Throws:
ParseException
NoSuchVariableException
NoSuchFunctionException
InvalidOperatorException
DAP2Exception
rel_op
public final int rel_op()
throws ParseException
- Throws:
ParseException
projection
public final void projection()
throws ParseException,
NoSuchVariableException,
NoSuchFunctionException,
InvalidOperatorException,
ParseException,
InvalidParameterException,
SBHException,
WrongTypeException,
DAP2Exception
- Throws:
ParseException
NoSuchVariableException
NoSuchFunctionException
InvalidOperatorException
InvalidParameterException
SBHException
WrongTypeException
DAP2Exception
proj_clause
public final void proj_clause()
throws ParseException,
NoSuchVariableException,
NoSuchFunctionException,
InvalidOperatorException,
ParseException,
InvalidParameterException,
SBHException,
WrongTypeException,
DAP2Exception
- Throws:
ParseException
NoSuchVariableException
NoSuchFunctionException
InvalidOperatorException
InvalidParameterException
SBHException
WrongTypeException
DAP2Exception
proj_variable
public final void proj_variable()
throws ParseException,
NoSuchVariableException,
NoSuchFunctionException,
InvalidOperatorException,
ParseException,
InvalidParameterException,
SBHException,
WrongTypeException,
DAP2Exception
- Throws:
ParseException
NoSuchVariableException
NoSuchFunctionException
InvalidOperatorException
InvalidParameterException
SBHException
WrongTypeException
DAP2Exception
component
public final java.util.Stack component(java.util.Stack components)
throws ParseException,
ParseException,
DAP2Exception
- Throws:
ParseException
DAP2Exception
arg_list
public final java.util.Vector arg_list()
throws ParseException,
NoSuchVariableException,
NoSuchFunctionException,
InvalidOperatorException,
ParseException,
DAP2Exception
- Throws:
ParseException
NoSuchVariableException
NoSuchFunctionException
InvalidOperatorException
DAP2Exception
array_index
public final void array_index(int count,
ServerArrayMethods bt)
throws ParseException,
ParseException,
DAP2Exception,
InvalidParameterException,
SBHException
- Throws:
ParseException
DAP2Exception
InvalidParameterException
SBHException
value
public final SubClause value()
throws ParseException,
NoSuchVariableException,
NoSuchFunctionException,
InvalidOperatorException,
DAP2Exception,
ParseException
- Throws:
ParseException
NoSuchVariableException
NoSuchFunctionException
InvalidOperatorException
DAP2Exception
field
public final java.lang.String field()
throws ParseException,
ParseException
- Throws:
ParseException
constant
public final BaseType constant()
throws ParseException,
DAP2Exception,
ParseException
- Throws:
ParseException
DAP2Exception
ReInit
public void ReInit(java.io.InputStream stream)
ReInit
public void ReInit(java.io.InputStream stream,
java.lang.String encoding)
ReInit
public void ReInit(java.io.Reader stream)
ReInit
public void ReInit(ExprParserTokenManager tm)
getNextToken
public final Token getNextToken()
getToken
public final Token getToken(int index)
generateParseException
public ParseException generateParseException()
enable_tracing
public final void enable_tracing()
disable_tracing
public final void disable_tracing()