org.millscript.millscript.syntax
Class ConfigurationParserImpl

java.lang.Object
  org.millscript.millscript.syntax.TokenizerImpl
      org.millscript.millscript.syntax.ConfigurationParserImpl

All Implemented Interfaces:

org.millscript.commons.alert.AlertOrigin, Parser, Tokenizer

Direct Known Subclasses:

ParserImpl

public class ConfigurationParserImpl
extends TokenizerImpl
implements Parser

This class implements the MillScript parser for use with configuration files. As such it is actually the complete parser implementation but it excludes nearly all syntax entries. The only syntax this parser understands is "(", "," and ")".

Field Summary

Fields inherited from class org.millscript.millscript.syntax.TokenizerImpl

config, interpolationMap

Fields inherited from interface org.millscript.millscript.syntax.Parser

ARITH_PREC, COMMA_PREC, COMMA_PREC1, LOW_PREC, NOT_PREC, RELOP_PREC, TIGHT_PREC

Constructor Summary

ConfigurationParserImpl(java.lang.String origin, java.io.Reader r, boolean eolc, Configuration c)
Constructs a new ParserImpl with the specified origin, source, interactive prompt and end of line comment status.

Method Summary

NameExpr	getEnclosingClass() Returns the enclosing class for this parser.
Expr	makeInterpolatedExpr() Returns the current string, as an application of the format function with the current interpolation map values as arguments.
protected static void	put(java.lang.String s, Syntax t) Convenience method for inserting entries in the symbol table.
java.lang.String	readAttributeName() Reads the next token from the source as an attribute name and returns it.
Expr	readBlock() Reads a sequence of expressions from the source as a Block.
Expr	readBlockTo(java.lang.String sym) Reads a sequence of expressions, followed by the specified symbol, from the source as a Block.
Expr	readExpr() Reads the next expression from the source.
Expr	readExprComma() Reads the next expression from the source at the COMMA_PREC1 precedence level.
Expr	readExprPrec(int prec) Reads the next expression from the source at the specified precedence level.
Expr	readExprTo(java.lang.String sym) Reads the next expression from the source, which must be followed by the specified symbol.
NameExpr	readName() Reads the next token from the source as a name and returns a name expression for it.
Expr	readOptExpr() Reads the optional next expression from the source.
Expr	readOptExprPrec(int prec) Reads the optional next expression from the source at the specified precedence level.
Expr	readOptPrimary() Reads the next token from the source as the optional primary expression in a potential sequence of expressions.
Expr	readPrimary() Reads the next token from the source as the primary expression in a potential sequence of expressions.
Expr	readStmnts() Reads a sequence of expressions from the source.
Expr	readStmntsTo(java.lang.String sym) Reads a sequence of expressions from the source, which must be followed by the specified symbol.
java.lang.String	readSymbol() Reads the next token from the source as a symbol and returns it.
java.lang.String	readTagName() Reads the next token from the source as a tag name and returns it.

Methods inherited from class org.millscript.millscript.syntax.TokenizerImpl

checkWhere, dropToken, getAttributeName, getErrorString, getInt, getLineNumber, getName, getOrigin, getQuoteChar, getString, getStringNoQuotes, getStringNoQuotes, getTagName, makePattern, markReader, mustRead, nextToken, peekRead, peekToken, resetReader, setContext, setLineNumber, setOrigin, setWhere, tryRead

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.millscript.millscript.syntax.Tokenizer

checkWhere, dropToken, getAttributeName, getErrorString, getInt, getLineNumber, getName, getOrigin, getQuoteChar, getString, getStringNoQuotes, getStringNoQuotes, getTagName, makePattern, markReader, mustRead, nextToken, peekRead, peekToken, resetReader, setWhere, tryRead

Methods inherited from interface org.millscript.commons.alert.AlertOrigin

setContext, setLineNumber, setOrigin

Constructor Detail

ConfigurationParserImpl

public ConfigurationParserImpl(java.lang.String origin,
                               java.io.Reader r,
                               boolean eolc,
                               Configuration c)

Constructs a new ParserImpl with the specified origin, source, interactive prompt and end of line comment status.

Parameters:

origin - the origin message for this tokenizer

r - the character source to tokenize

eolc - flag indicating if end of line comments are supported

c - the configuration

Method Detail

getEnclosingClass

public NameExpr getEnclosingClass()

Description copied from interface: Parser

Returns the enclosing class for this parser.

Specified by:

getEnclosingClass in interface Parser

Returns:

a NameExpr for the enclosing class

See Also:

Parser.getEnclosingClass()

makeInterpolatedExpr

public Expr makeInterpolatedExpr()

Description copied from interface: Parser

Returns the current string, as an application of the format function with the current interpolation map values as arguments. The values in the interpolation map will be parsed into expressions.

Specified by:

makeInterpolatedExpr in interface Parser

Returns:

an ApplyExpr, applying the format function to format the current string

See Also:

Parser.makeInterpolatedExpr()

put

protected static void put(java.lang.String s,
                          Syntax t)

Convenience method for inserting entries in the symbol table.

Parameters:

s - symbol

t - Syntax for symbol

readAttributeName

public java.lang.String readAttributeName()

Description copied from interface: Parser

Reads the next token from the source as an attribute name and returns it. An alert will be generated if the next token is not a name.

Specified by:

readAttributeName in interface Parser

Returns:

a String containing a tag name

See Also:

Parser.readAttributeName()

readBlock

public Expr readBlock()

Description copied from interface: Parser

Reads a sequence of expressions from the source as a Block.

Specified by:

readBlock in interface Parser

Returns:

a Block wrapping the sequence of expressions read

See Also:

Parser.readBlock()

readBlockTo

public Expr readBlockTo(java.lang.String sym)

Description copied from interface: Parser

Reads a sequence of expressions, followed by the specified symbol, from the source as a Block.

Specified by:

readBlockTo in interface Parser

Parameters:

sym - the symbol which must follow the block

Returns:

a Block wrapping the sequence of expressions read

See Also:

Parser.readBlockTo(java.lang.String)

readExpr

public Expr readExpr()

Description copied from interface: Parser

Reads the next expression from the source.

Specified by:

readExpr in interface Parser

Returns:

an Expr for the next token in the source

See Also:

Parser.readExpr()

readExprComma

public Expr readExprComma()

Description copied from interface: Parser

Reads the next expression from the source at the COMMA_PREC1 precedence level. Hence this will read up to the next comma.

Specified by:

readExprComma in interface Parser

Returns:

an Expr for the next token in the source

See Also:

Parser.readExprComma()

readExprPrec

public Expr readExprPrec(int prec)

Description copied from interface: Parser

Reads the next expression from the source at the specified precedence level.

Specified by:

readExprPrec in interface Parser

Parameters:

prec - the precedence level to read the next expression at

Returns:

an Expr for the next token in the source

See Also:

Parser.readExprPrec(int)

readExprTo

public Expr readExprTo(java.lang.String sym)

Description copied from interface: Parser

Reads the next expression from the source, which must be followed by the specified symbol.

Specified by:

readExprTo in interface Parser

Parameters:

sym - the symbol which must follow the expression

Returns:

an Expr for the next token in the source

See Also:

Parser.readExprTo(java.lang.String)

readName

public NameExpr readName()

Description copied from interface: Parser

Reads the next token from the source as a name and returns a name expression for it. A name is a symbol that is not a keyword. An alert will be generated if the next token is a built in identifier.

Specified by:

readName in interface Parser

Returns:

a NameExpr for the next token

See Also:

Parser.readName()

readOptExpr

public Expr readOptExpr()

Description copied from interface: Parser

Reads the optional next expression from the source. Optional means that there doesn't have to be another expression in the source.

Specified by:

readOptExpr in interface Parser

Returns:

an Expr for the next token in the source

See Also:

Parser.readOptExpr()

readOptExprPrec

public Expr readOptExprPrec(int prec)

Description copied from interface: Parser

Reads the optional next expression from the source at the specified precedence level. Optional means that there doesn't have to be another expression in the source.

Specified by:

readOptExprPrec in interface Parser

Parameters:

prec - the precedence level to read the next expression at

Returns:

an Expr for the next token in the source

See Also:

Parser.readOptExprPrec(int)

readOptPrimary

public Expr readOptPrimary()

Description copied from interface: Parser

Reads the next token from the source as the optional primary expression in a potential sequence of expressions.

Specified by:

readOptPrimary in interface Parser

Returns:

an Expr for the next token in the source

See Also:

Parser.readOptPrimary()

readPrimary

public Expr readPrimary()

Description copied from interface: Parser

Reads the next token from the source as the primary expression in a potential sequence of expressions.

Specified by:

readPrimary in interface Parser

Returns:

an Expr for the next token in the source

See Also:

Parser.readPrimary()

readStmnts

public Expr readStmnts()

Description copied from interface: Parser

Reads a sequence of expressions from the source. The sequence of expressions are wrapped as a comma expression. This method will read up to the end of file, or a built-in keyword.

Specified by:

readStmnts in interface Parser

Returns:

an Expr for the sequence of expressions read

See Also:

Parser.readStmnts()

readStmntsTo

public Expr readStmntsTo(java.lang.String sym)

Description copied from interface: Parser

Reads a sequence of expressions from the source, which must be followed by the specified symbol.

Specified by:

readStmntsTo in interface Parser

Parameters:

sym - the symbol which must follow the statements

Returns:

an Expr for the sequence of expressions read

See Also:

Parser.readStmntsTo(java.lang.String)

readSymbol

public java.lang.String readSymbol()

Description copied from interface: Parser

Reads the next token from the source as a symbol and returns it. An alert will be generated if the next token is not a name.

Specified by:

readSymbol in interface Parser

Returns:

a String containing the next symbol

See Also:

Parser.readSymbol()

readTagName

public java.lang.String readTagName()

Description copied from interface: Parser

Reads the next token from the source as a tag name and returns it. An alert will be generated if the next token is not a name.

Specified by:

readTagName in interface Parser

Returns:

a String containing a tag name

See Also:

Parser.readTagName()