DDBean (Java EE 5)

表示标准部署描述符片断的 Bean 接口。可为包含此 Bean 的 J2EE 应用程序提供链接。 英文文档：

An interface for beans that represent a fragment of a standard deployment descriptor. A link is provided to the J2EE application that includes this bean.

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Method Summary
void	addXpathListener(String xpath, XpathListener xpl)           Register a listener for a specific XPath.
String[]	getAttributeNames()           Returns the list of attribute names associated with the XML element.
String	getAttributeValue(String attrName)           Returns the string value of the named attribute.
DDBean[]	getChildBean(String xpath)           Return a list of DDBeans based upon the XPath.
String	getId()           Returns a tool-specific reference for attribute ID on an element in the deployment descriptor.
DDBeanRoot	getRoot()           Return the root element for this DDBean.
String	getText()           Returns the XML text for by this bean.
String[]	getText(String xpath)           Return a list of text values for a given XPath in the deployment descriptor.
String	getXpath()           Returns the original xpath string provided by the DConfigBean.
void	removeXpathListener(String xpath, XpathListener xpl)           Unregister a listener for a specific XPath.

 

Method Detail

public String getXpath()
返回 DConfigBean 提供的原 xpath 字符串。

return

此 Bean 的 XPath。

英文文档：

getXpath

String getXpath()

Returns the original xpath string provided by the DConfigBean.

Returns:

The XPath of this Bean.

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public String getText()
返回此 Bean 的 XML 文本。

return

此 Bean 的 XML 文本。

英文文档：

getText

String getText()

Returns the XML text for by this bean.

Returns:

The XML text for this Bean.

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public String getId()
返回一个特定于工具的引用，它引用部署描述符中某个元素的属性 ID。此属性是为 J2EE 1.2 和 J2EE 1.3 组件定义的。

return

此 Bean 的 XML 文本；如果未使用标记指定任何属性，则返回 'null'。

英文文档：

getId

String getId()

Returns a tool-specific reference for attribute ID on an element in the deployment descriptor. This attribute is defined for J2EE 1.2 and 1.3 components.

Returns:

The XML text for this Bean or 'null' if no attribute was specifed with the tag.

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public DDBeanRoot getRoot()
返回此 DDBean 的根元素。

return

此 DDBean 树根下的 DDBeanRoot。

英文文档：

getRoot

DDBeanRoot getRoot()

Return the root element for this DDBean.

Returns:

The DDBeanRoot at the root of this DDBean tree.

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public DDBean[] getChildBean(String xpath)
返回基于 XPath 的 DDBeans 列表。

xpath	引用此标准 Bean 所使用的部署描述符中某个位置的 XPath 字符串。
return	DDBeans 列表；如果未找到任何匹配的 XML 数据，则返回 'null'。

英文文档：

getChildBean

DDBean[] getChildBean(String xpath)

Return a list of DDBeans based upon the XPath.

Parameters:

xpath - An XPath string referring to a location in the same deployment descriptor as this standard bean.

Returns:

a list of DDBeans or 'null' if no matching XML data is found.

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public String[] getText(String xpath)
返回部署描述符中给定 XPath 的文本值列表。

xpath	XPath。
return	此 XPath 的文本值列表；如果未找到任何匹配的 XML 数据，则返回 'null'。

英文文档：

getText

String[] getText(String xpath)

Return a list of text values for a given XPath in the deployment descriptor.

Parameters:

xpath - An XPath.

Returns:

The list text values for this XPath or 'null' if no matching XML data is found.

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public void addXpathListener(String xpath, XpathListener xpl)
为特定 XPath 注册一个侦听器。

xpath	要注册此侦听器的 XPath。
xpl	侦听器对象。

英文文档：

addXpathListener

void addXpathListener(String xpath,
                      XpathListener xpl)

Register a listener for a specific XPath.

Parameters:

xpath - The XPath this listener is to be registered for.

xpl - The listener object.

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public void removeXpathListener(String xpath, XpathListener xpl)
取消为特定 XPath 注册的侦听器。

xpath	要取消注册此侦听器的 XPath。
xpl	侦听器对象。

英文文档：

removeXpathListener

void removeXpathListener(String xpath,
                         XpathListener xpl)

Unregister a listener for a specific XPath.

Parameters:

xpath - The XPath from which this listener is to be unregistered.

xpl - The listener object.

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public String[] getAttributeNames()
返回与 XML 元素关联的属性名称列表。

return

此元素的属性名称列表。如果不存在任何属性，则返回 null。

英文文档：

getAttributeNames

String[] getAttributeNames()

Returns the list of attribute names associated with the XML element.

Returns:

a list of attribute names on this element. Null is returned if there are no attributes.

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public String getAttributeValue(String attrName)
返回指定属性的字符串值。

return

属性的值。如果不存在这种属性，则返回 null。

英文文档：

getAttributeValue

String getAttributeValue(String attrName)

Returns the string value of the named attribute.

Returns:

a the value of the attribute. Null is returned if there is no such attribute.

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