bboss.org.apache.velocity.runtime.parser.node

类 ASTMathNode

java.lang.Object

bboss.org.apache.velocity.runtime.parser.node.SimpleNode

bboss.org.apache.velocity.runtime.parser.node.ASTMathNode

所有已实现的接口:

Node, Renderable

直接已知子类:

ASTAddNode, ASTDivNode, ASTModNode, ASTMulNode, ASTSubtractNode

public abstract class ASTMathNode
extends SimpleNode

Helps handle math

Please look at the Parser.jjt file which is what controls the generation of this class.

字段概要

字段

限定符和类型	字段和说明
protected boolean	strictMode

从类继承的字段 bboss.org.apache.velocity.runtime.parser.node.SimpleNode

children, first, id, info, invalid, last, log, parent, parser, rsvc, state, templateName

构造器概要

构造器

构造器和说明
ASTMathNode(int id)
ASTMathNode(Parser p, int id)

方法概要

限定符和类型	方法和说明
protected java.lang.Object	handleSpecial(java.lang.Object left, java.lang.Object right, InternalContextAdapter context) Extension hook to allow special behavior by subclasses If this method returns a non-null value, that is returned, rather than the result of the math operation.
java.lang.Object	init(InternalContextAdapter context, java.lang.Object data)
java.lang.Object	jjtAccept(ParserVisitor visitor, java.lang.Object data)
abstract java.lang.Number	perform(java.lang.Number left, java.lang.Number right, InternalContextAdapter context) Performs the math operation represented by this node.
java.lang.Object	value(InternalContextAdapter context) gets the two args and performs the operation on them

从类继承的方法 bboss.org.apache.velocity.runtime.parser.node.SimpleNode

childrenAccept, dump, evaluate, execute, getChildren, getColumn, getFirstToken, getInfo, getLastToken, getLine, getLocation, getRuntimeServices, getTemplateName, getType, isInvalid, jjtAddChild, jjtClose, jjtGetChild, jjtGetNumChildren, jjtGetParent, jjtOpen, jjtSetParent, literal, render, setFirstToken, setInfo, setInvalid, toString, toString

从类继承的方法 java.lang.Object

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

字段详细资料

strictMode

protected boolean strictMode

构造器详细资料

ASTMathNode

public ASTMathNode(int id)

ASTMathNode

public ASTMathNode(Parser p,
                   int id)

方法详细资料

init

public java.lang.Object init(InternalContextAdapter context,
                             java.lang.Object data)
                      throws TemplateInitException

指定者:

init 在接口中 Node

覆盖:

init 在类中 SimpleNode

返回:

The init result.

抛出:

TemplateInitException

另请参阅:

Node.init(bboss.org.apache.velocity.context.InternalContextAdapter, java.lang.Object)

jjtAccept

public java.lang.Object jjtAccept(ParserVisitor visitor,
                                  java.lang.Object data)

指定者:

jjtAccept 在接口中 Node

覆盖:

jjtAccept 在类中 SimpleNode

返回:

The Node execution result object.

另请参阅:

Node.jjtAccept(bboss.org.apache.velocity.runtime.parser.node.ParserVisitor, java.lang.Object)

value

public java.lang.Object value(InternalContextAdapter context)
                       throws MethodInvocationException

gets the two args and performs the operation on them

指定者:

value 在接口中 Node

覆盖:

value 在类中 SimpleNode

参数:

context -

返回:

result or null

抛出:

MethodInvocationException

另请参阅:

Node.value(bboss.org.apache.velocity.context.InternalContextAdapter)

handleSpecial

protected java.lang.Object handleSpecial(java.lang.Object left,
                                         java.lang.Object right,
                                         InternalContextAdapter context)

Extension hook to allow special behavior by subclasses If this method returns a non-null value, that is returned, rather than the result of the math operation.

另请参阅:

ASTAddNode.handleSpecial(java.lang.Object, java.lang.Object, bboss.org.apache.velocity.context.InternalContextAdapter)

perform

public abstract java.lang.Number perform(java.lang.Number left,
                                         java.lang.Number right,
                                         InternalContextAdapter context)

Performs the math operation represented by this node.