Package org.apache.xpath.compiler

Class OpCodes

java.lang.Object
org.apache.xpath.compiler.OpCodes
public class OpCodes
extends Object
Operations codes for XPath. Code for the descriptions of the operations codes: [UPPER CASE] indicates a literal value, [lower case] is a description of a value, ([length] always indicates the length of the operation, including the operations code and the length integer.) {UPPER CASE} indicates the given production, {description} is the description of a new production, (For instance, {boolean expression} means some expression that should be resolved to a boolean.) * means that it occurs zero or more times, + means that it occurs one or more times, ? means that it is optional. returns: indicates what the production should return.

  • Field Summary

    Fields 
    Modifier and Type Field Description
    static int AXES_END_TYPES
    The end of the axes types.
    static int AXES_START_TYPES
    [FROM_stepType] [length, including predicates] [length of just the step, without the predicates] {node test} {predicates}? returns: XBoolean
    static int ELEMWILDCARD
    [ELEMWILDCARD] Means ELEMWILDCARD ("*"), used instead of string index in some places.
    static int EMPTY
    [EMPTY] Empty slot to indicate NULL.
    static int ENDOP
    [ENDOP] Some operators may like to have a terminator.
    static int FROM_ANCESTORS
    ancestor axes opcode.
    static int FROM_ANCESTORS_OR_SELF
    ancestor-or-self axes opcode.
    static int FROM_ATTRIBUTES
    attribute axes opcode.
    static int FROM_CHILDREN
    children axes opcode.
    static int FROM_DESCENDANTS
    descendants axes opcode.
    static int FROM_DESCENDANTS_OR_SELF
    descendants-of-self axes opcode.
    static int FROM_FOLLOWING
    following axes opcode.
    static int FROM_FOLLOWING_SIBLINGS
    following-siblings axes opcode.
    static int FROM_NAMESPACE
    namespace axes opcode.
    static int FROM_PARENT
    parent axes opcode.
    static int FROM_PRECEDING
    preceding axes opcode.
    static int FROM_PRECEDING_SIBLINGS
    preceding-sibling axes opcode.
    static int FROM_ROOT
    '/' axes opcode.
    static int FROM_SELF
    self axes opcode.
    static int MATCH_ANY_ANCESTOR
    For match patterns.
    static int MATCH_ATTRIBUTE
    For match patterns.
    static int MATCH_IMMEDIATE_ANCESTOR
    For match patterns.
    static int NODENAME
    [NODENAME] [index to ns token or EMPTY] [index to name token] returns: XBoolean
    static int NODETYPE_ANYELEMENT
    [NODETYPE_ANY] No size or arguments.
    static int NODETYPE_COMMENT
    [NODETYPE_COMMENT] No size or arguments.
    static int NODETYPE_FUNCTEST
    [NODETYPE_ANY] No size or arguments.
    static int NODETYPE_NODE
    [NODETYPE_NODE] No size or arguments.
    static int NODETYPE_PI
    [NODETYPE_PI] [index to token] Note: must not overlap function OP number! returns: XBoolean
    static int NODETYPE_ROOT
    [NODETYPE_ROOT] No size or arguments.
    static int NODETYPE_TEXT
    [NODETYPE_TEXT] No size or arguments.
    static int OP_AND
    [OP_AND] [length] {boolean expression} {boolean expression} returns: XBoolean
    static int OP_ARGUMENT
    [OP_ARGUMENT] (Function argument.) [length] {expression} returns: XNodeSet XNumber XString XBoolean XRTree XObject
    static int OP_BOOL
    [OP_BOOL] (cast operation) [length] {expression} returns: XBoolean
    static int OP_DIV
    [OP_DIV] [length] {number expression} {number expression} returns: XNumber
    static int OP_EQUALS
    [OP_EQUALS] [length] {expression} {expression} returns: XBoolean
    static int OP_EXTFUNCTION
    [OP_EXTFUNCTION] (Extension function.) [length] [index to namespace token] [index to function name token] {OP_ARGUMENT} returns: XNodeSet XNumber XString XBoolean XRTree XObject
    static int OP_FUNCTION
    [OP_FUNCTION] [length] [FUNC_name] {OP_ARGUMENT} [ENDOP] returns: XNodeSet XNumber XString XBoolean XRTree XObject
    static int OP_GROUP
    [OP_GROUP] [length] {expression} returns: XNodeSet XNumber XString XBoolean XRTree XObject
    static int OP_GT
    [OP_GT] (greater-than) [length] {number expression} {number expression} returns: XBoolean
    static int OP_GTE
    [OP_GTE] (greater-than-or-equals) [length] {number expression} {number expression} returns: XBoolean
    static int OP_LITERAL
    [OP_LITERAL] [3] [index to token] returns: XString
    static int OP_LOCATIONPATH
    [OP_LOCATIONPATH] [length] {FROM_stepType} | {function} {predicate} [ENDOP] (Note that element and attribute namespaces and names can be wildcarded '*'.) returns: XNodeSet
    static int OP_LOCATIONPATHPATTERN
    [OP_LOCATIONPATHPATTERN] [length] {FROM_stepType} | {function}{predicate} [ENDOP] returns: XNodeSet
    static int OP_LT
    [OP_LT] (less-than) [length] {number expression} {number expression} returns: XBoolean
    static int OP_LTE
    [OP_LTE] (less-than-or-equals) [length] {number expression} {number expression} returns: XBoolean
    static int OP_MATCHPATTERN
    [OP_MATCHPATTERN] [length] {PathExpr}+ returns: XNodeSet
    static int OP_MINUS
    [OP_MINUS] [length] {number expression} {number expression} returns: XNumber
    static int OP_MOD
    [OP_MOD] [length] {number expression} {number expression} returns: XNumber
    static int OP_MULT
    [OP_MULT] [length] {number expression} {number expression} returns: XNumber
    static int OP_NEG
    [OP_NEG] [length] {number expression} returns: XNumber
    static int OP_NOTEQUALS
    [OP_NOTEQUALS] [length] {expression} {expression} returns: XBoolean
    static int OP_NUMBER
    [OP_NUMBER] (cast operation) [length] {expression} returns: XBoolean
    static int OP_NUMBERLIT
    [OP_NUMBERLIT] (Number literal.) [3] [index to token] returns: XString
    static int OP_OR
    [OP_OR] [length] {boolean expression} {boolean expression} returns: XBoolean
    static int OP_PLUS
    [OP_PLUS] [length] {number expression} {number expression} returns: XNumber
    static int OP_PREDICATE
    [OP_PREDICATE] [length] {expression} [ENDOP] (For safety) returns: XBoolean or XNumber
    static int OP_QUO
    [OP_QUO] [length] {number expression} {number expression} returns: XNumber
    static int OP_STRING
    [OP_STRING] (cast operation) [length] {expression} returns: XString
    static int OP_UNION
    [OP_UNION] [length] {PathExpr}+ returns: XNodeSet
    static int OP_VARIABLE
    [OP_VARIABLE] [4] [index to namespace token, or EMPTY] [index to function name token] returns: XString
    static int OP_XPATH
    [OP_XPATH] [length] {expression} returns: XNodeSet XNumber XString XBoolean XRTree XObject

  • Constructor Summary

    Constructors 
    Constructor Description
    OpCodes()  

  • Method Summary

    Methods inherited from class java.lang.Object

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