org.zkoss.zkmax.xel.util

Class ExpressionFragment

java.lang.Object

org.zkoss.zkmax.xel.util.ExpressionFragment

All Implemented Interfaces:

Serializable

public class ExpressionFragment
extends Object
implements Serializable

Represents an expression fragment of an expression. When parse(java.lang.String) is called, a list of fragments is returned. Each of them is either a Spring instance or a ExpressionFragment instance.

Available in ZK EE

For example, "ab${x + y}cd${z}" is broken into the following segments, when parse(java.lang.String) is called:
String("ab"), ExpressionFragment("x+y"), String("cd") and ExpressionFragment("z").

It is used to implement ExpressionFactory based on an evaluator that doesn't support the syntax of ${expr}. The users of XEL expressions rarely needs to use this class.

Since:

3.0.0

Author:

tomyeh

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
String	getExpression() Returns the expression.
int	hashCode()
static List<Object>	parse(String expr) Parses an expression into a list of fragments.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

parse

public static final List<Object> parse(String expr)

Parses an expression into a list of fragments. Each of them is either a Spring instance or a ExpressionFragment instance.

For example, "ab${x + y}cd${z}" is broken into the following segments, when parse(java.lang.String) is called:
String("ab"), ExpressionFragment("x+y"), String("cd") and ExpressionFragment("z").

Parameters:

expr - the expression that may or may not contain one or multiple ${expr}. It cannot be null.

getExpression

public String getExpression()

Returns the expression.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object