类 com.hp.hpl.sparta.xpath.BooleanExpr
的使用

使用BooleanExpr的程序包

程序包	说明
com.hp.hpl.sparta.xpath	XPath parse trees over which Visitor objects can traverse to apply the XPath expression to DOM nodes.

com.hp.hpl.sparta.xpath中BooleanExpr的使用

com.hp.hpl.sparta.xpath中BooleanExpr的子类

限定符和类型	类和说明
class	AttrCompareExpr Compare attribute to string.
class	AttrEqualsExpr A '@attrName = "value"' test.
class	AttrExistsExpr A '@attrName' test to see if attribute exists.
class	AttrExpr A boolean test on an attribute.
class	AttrGreaterExpr A '@attrName > n' test.
class	AttrLessExpr A '@attrName < "n"' test.
class	AttrNotEqualsExpr An expression testing that an attribute is not equal to a given string.
class	AttrRelationalExpr Compare attribute relative to integer.
class	PositionEqualsExpr Test position within element list.
class	TextCompareExpr Compare text value.
class	TextEqualsExpr [text()='value'] expression Copyright (C) 2002 Hewlett-Packard Company.
class	TextExistsExpr [text()] expression This is part of the GoF Flyweight(195) pattern -- Only one object of this class ever exists, shared amongst all clients.
class	TextNotEqualsExpr An expression testing that the text node is not equal to a given string.
class	TrueExpr The boolean constant "true".

返回BooleanExpr的com.hp.hpl.sparta.xpath中的方法

限定符和类型	方法和说明
BooleanExpr	Step.getPredicate()