Getting properties/parameters from page level

问题:

I wonder if I can get the parameters and/or properties of an xpage or custom control programmatically.

<xp:view xmlns:xp="http://www.ibm.com/xsp/core" id="layout">

<xp:this.properties>
    <xp:parameter name="testcc.xsp" value="Test 1"></xp:parameter>
    <xp:parameter name="index.xsp" value="Main"></xp:parameter>
</xp:this.properties>
...

How can I access this parameter list to use it e.g. in a repeat control?

EDIT You both are right, thank you! But this works only on a page, not in a custom control.

EDIT

You both are great :-)

BUT: I should revise my question: I have a custom control where I defined the properties. Within the SAMe custom control I want to access these properties in a repeat control.

Both your answers seem to assume that the access to these properties is from the view (page) level, right?

I tested Svens way - this works if I access the props in the CC from the page level.

EDIT

So this is the code of the CC:

<?xml version="1.0" encoding="UTF-8"?>
<xp:view xmlns:xp="http://www.ibm.com/xsp/core">

<xp:this.properties>
    <xp:parameter name="param" value="val"></xp:parameter>
</xp:this.properties>

<xp:label value="#{javascript:facesContext.getProperty('param')}"
    id="label1">
</xp:label>

</xp:view>

As you can see I just want to access the property within the CC itselt, not from the page level.

回答1:

You can get the properties by accessing facesContext:

facesContext.getProperty("index.xsp")

EDIT:

If you set the properties in a custom control, the properties are not added to the view root. The are set as attributes of the custom control (com.ibm.xsp.component.UIIncludeComposite).

To access them you first have to give your CC an Id:

<xc:ccProp id="myId" />

This allows you to access the custom control like a component with the getComponent() method and retrieve the attribute properties which contains the properties:

<xp:label id="labelProperty">
    <xp:this.value><![CDATA[#{javascript:
        var cc:com.ibm.xsp.component.UIIncludeComposite = getComponent("myId");
        var arrList:java.util.ArrayList = cc.getAttributes().get("properties");
        arrList.get(0).getName()}]]>
    </xp:this.value>
</xp:label>

EDIT 2:

You can access the CC (which is the parent of the label in this example) this way if you don't want to give your CC an ID:

Code of the custom control:

<?xml version="1.0" encoding="UTF-8"?>
<xp:view xmlns:xp="http://www.ibm.com/xsp/core">

    <xp:this.properties>
        <xp:parameter name="param" value="val"></xp:parameter>
    </xp:this.properties>

    <xp:label id="label1">
        <xp:this.value><![CDATA[#{javascript:
            this.parent.getAttributes().get("properties").get(0).getName()
       }]]></xp:this.value>
   </xp:label>

    <xp:label id="label2">
        <xp:this.value><![CDATA[#{javascript:
            this.parent.getAttributes().get("properties").get(0).getValue()
       }]]></xp:this.value>
   </xp:label>

</xp:view>

Hope this helps to clarify the issue.

回答2:

To get the property list you can use the view.getProperties(). It returns an object of java.util.List which you can use to loop through individual properties (which are objects of com.ibm.xsp.complex.Parameter). Below is the snippet.

var allProperties:java.util.List = view.getProperties();
for (var i=0 ; i<allProperties.size() ; i++) {
    var property:com.ibm.xsp.complex.Parameter = allProperties.get(i);

    // property.getName();
    // property.getValue();
}

If you want to put it in a repeat then you can bind it to view.getProperties() and then get its individual values. You code would then look something like this:

<xp:repeat rows="30" value="#{javascript:view.getProperties()}" var="property">
    <xp:text escape="true">
        <xp:this.value><![CDATA[#{javascript:property.getName() + " - " + property.getValue();}]]></xp:this.value>
    </xp:text>
    <xp:br></xp:br>
</xp:repeat>

回答3:

If you've got values that you want to use on the various parts of an Xpage, whether directly on the page, in a custom control, or in a repeat, I would recommend that you put the values into sessionScope variables. This allows you to change them easily as the user enters information on the Xpage.

For example, sessionScope.PODocUNID = poDoc.getDocument().getUniversalID(); would put the UNID of the purchase order document that I'm working with into a sessionScope variable named PODocUNID. Then, you can pull up the value any time you want by simply referencing sessionScope.PODocUNID in your code.

Alternatively, you could use Russ Maher's current favorite toy, the Managed Bean (see his three-part video on Notes in 9, starting at: http://notesin9.com/index.php/2012/11/02/notesin9-084-sharing-managed-beans-in-xpages/ )