Package org.zkoss.zk.ui.metainfo

Class ZScriptInfo

java.lang.Object

org.zkoss.zk.ui.metainfo.ZScriptInfo

All Implemented Interfaces:

Serializable, NodeInfo, Condition

public class ZScriptInfo
extends Object

Represents a zscript element.

Since:

6.0.0

Author:

tomyeh

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
ZScriptInfo(NodeInfo parent, String zslang, String url, org.zkoss.util.resource.Locator locator, ConditionImpl cond)	Constructs a ZScriptInfo with an URL, which might contain an EL expression.
ZScriptInfo(NodeInfo parent, String zslang, String content, ConditionImpl cond)	Creates a ZScriptInfo with the content directly.
ZScriptInfo(NodeInfo parent, String zslang, URL url, ConditionImpl cond)	Create a ZScriptInfo with an URL that is used to load the content.

Method Summary

Modifier and Type	Method	Description
void	appendChild(NodeInfo child)	Append a child
List<NodeInfo>	getChildren()	Returns a readonly list of children.
String	getContent(Page page, Component comp)	Returns the content of zscript.
Evaluator	getEvaluator()	Returns the evaluator.
EvaluatorRef	getEvaluatorRef()	Returns the evaluator reference.
String	getLanguage()	Returns the scripting language, or null if the default scripting language is preferred.
PageDefinition	getPageDefinition()	Returns the page definition, i.e., the root node, or null if not available.
NodeInfo	getParent()	Returns the parent, or null if it has no parent.
String	getRawContent()	Returns the raw content.
ZScript	getZScript()	Returns the ZScript object hold in this info.
boolean	isDeferred()	Returns whether the evaluation of the zscript shall be deferred.
boolean	isEffective(Component comp)	Used to evaluate whether it is effective.
boolean	isEffective(Page page)	Used to evaluate whether it is effective.
boolean	removeChild(NodeInfo child)	Removes a child.
void	setCondition(ConditionImpl cond)	Sets the effectiveness condition.
void	setDeferred(boolean deferred)	Sets whether the evaluation of the zscript shall be deferred.
void	setLanguage(String zslang)	Sets the scripting language.
String	toString()
boolean	withCondition()	Tests if the condition is set

Methods inherited from class java.lang.Object

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

Constructor Details

ZScriptInfo

public ZScriptInfo(NodeInfo parent,
 String zslang,
 String content,
 ConditionImpl cond)

Creates a ZScriptInfo with the content directly.

Parameters:

zslang - the scripting language. If null, it is the same as Page.getZScriptLanguage().

content - the zscript content

ZScriptInfo

public ZScriptInfo(NodeInfo parent,
 String zslang,
 URL url,
 ConditionImpl cond)

Create a ZScriptInfo with an URL that is used to load the content.

Parameters:

url - the URL to load the content of zscript.

ZScriptInfo

public ZScriptInfo(NodeInfo parent,
 String zslang,
 String url,
 org.zkoss.util.resource.Locator locator,
 ConditionImpl cond)

Constructs a ZScriptInfo with an URL, which might contain an EL expression.

Parameters:

url - the URL. It may contain XEL expressions.

locator - the locator used to locate the zscript file

Method Details

getZScript

public ZScript getZScript()

Returns the ZScript object hold in this info.

getLanguage

public String getLanguage()

Returns the scripting language, or null if the default scripting language is preferred.

setLanguage

public void setLanguage(String zslang)

Sets the scripting language.

Parameters:

zslang - the scripting language. If null, the default scripting language is assume.

getRawContent

public String getRawContent()

Returns the raw content. It is the content specified in the constructor (ZScriptInfo(NodeInfo, String, String, ConditionImpl). If URL is specified in the constructor, null is returned.

On the other hand, getContent(org.zkoss.zk.ui.Page, org.zkoss.zk.ui.Component) will load the content automatically if URL is specified.

Returns:

the raw content specified in the constructor, or null if URL is specified instead.

getContent

public String getContent(Page page,
 Component comp)

Returns the content of zscript. If URL is specified, this method loads the content from it. If URL is an EL expression, it will be evaluated first.

Note: before evaluating the returned script, you have to invoke Condition.isEffective(Component) or Condition.isEffective(Page) first.

Parameters:

page - the page when this zscript is interpreted. Used only if this object is constructed with ZScriptInfo(NodeInfo, String, String, Locator, ConditionImpl).

comp - the component when this zscript is interpreted. Used only if this object is constructed with ZScriptInfo(NodeInfo, String, String, Locator, ConditionImpl).

Throws:

UiException - if failed to load the content

isDeferred

public boolean isDeferred()

Returns whether the evaluation of the zscript shall be deferred.

setDeferred

public void setDeferred(boolean deferred)

Sets whether the evaluation of the zscript shall be deferred.

Default: false.

toString

public String toString()

Overrides:

toString in class Object

setCondition

public void setCondition(ConditionImpl cond)

Sets the effectiveness condition.

withCondition

public boolean withCondition()

Tests if the condition is set

isEffective

public boolean isEffective(Component comp)

Description copied from interface: Condition

Used to evaluate whether it is effective.

Specified by:

isEffective in interface Condition

Parameters:

comp - used as the self variable. Ignored if null.

isEffective

public boolean isEffective(Page page)

Description copied from interface: Condition

Used to evaluate whether it is effective.

Specified by:

isEffective in interface Condition

Parameters:

page - used as the self variable. Ignored if null.

getEvaluatorRef

public EvaluatorRef getEvaluatorRef()

Description copied from interface: NodeInfo

Returns the evaluator reference.

Specified by:

getEvaluatorRef in interface NodeInfo

getPageDefinition

public PageDefinition getPageDefinition()

Description copied from interface: NodeInfo

Returns the page definition, i.e., the root node, or null if not available.

Specified by:

getPageDefinition in interface NodeInfo

getEvaluator

public Evaluator getEvaluator()

Description copied from interface: NodeInfo

Returns the evaluator.

All nodes in the same ZUML tree has the same evaluator reference (inherited from the root node, PageDefinition.getEvaluatorRef()).

Specified by:

getEvaluator in interface NodeInfo

getParent

public NodeInfo getParent()

Description copied from interface: NodeInfo

Returns the parent, or null if it has no parent.

Specified by:

getParent in interface NodeInfo

getChildren

public List<NodeInfo> getChildren()

Description copied from interface: NodeInfo

Returns a readonly list of children.

Note: the returned list is readonly. To modify, please use NodeInfo.appendChild(org.zkoss.zk.ui.metainfo.NodeInfo) and NodeInfo.removeChild(org.zkoss.zk.ui.metainfo.NodeInfo) instead.

Specified by:

getChildren in interface NodeInfo

appendChild

public void appendChild(NodeInfo child)

Description copied from interface: NodeInfo

Append a child

Specified by:

appendChild in interface NodeInfo

removeChild

public boolean removeChild(NodeInfo child)

Description copied from interface: NodeInfo

Removes a child.

Specified by:

removeChild in interface NodeInfo