G.dimaio: /* Description */

2015-01-02T10:19:59Z

‎Description

G.dimaio: Created page with "==Description==
The content defines a JavaScript script. This script is applied to the current GVBuffer object. Within a node ChangeGVBuffer..."

2015-01-02T09:03:51Z

Created page with "==Description== <div class="version_lt3.5"> The content defines a JavaScript script. This script is applied to the current GVBuffer object. Within a node ChangeGVBuffer..."

New page

==Description==

<div class="version_lt3.5">
The content defines a JavaScript script. This script is applied to the current [[GVBuffer]] object.

Within a node [[ChangeGVBuffer]] is used for script execution, execution environment map is added to the script context as 'environment' property and the current input object is added as 'data' property.

The element value cannot be null.

The Script Element is used by [[ChangeGVBuffer]] and [[GVOperationNode#java-script-call|java-script-call]].

Following an example of a script implementing the toUpperCase service:

<syntaxhighlight lang="xml">
<GVOperationNode class="it.greenvulcano.gvesb.core.flow.GVOperationNode"
id="call_server" id-system="GVESB" input="input"
next-node-id="end" op-type="call"
operation-name="echo_call" output="output"
point-x="186" point-y="152" type="flow-node">
<OutputServices>
<java-script-service critical="yes" internal="yes" type="service">
<java-script-call class="it.greenvulcano.gvesb.virtual.internal.JSCallOperation"
name="toupper" type="call">
<Script>root.setObject(root.getObject().toUpperCase());</Script>
</java-script-call>
</java-script-service>
</OutputServices>
</GVOperationNode>
</syntaxhighlight>
</div>

<div class="version_ge3.5">
The content defines a generic script. This script is applied to the current [[GVBuffer]] object or other objects, depending the containing context.

Within a node [[ChangeGVBuffer]] is used for script execution, execution environment map is added to the script context as 'environment' property and the current input object is added as 'data' property. The properties access syntax is language-dependent.

The element value cannot be null. If defined the 'file' attribute overrides the contained script.

The Script Element is used by [[ChangeGVBuffer]], [[GVOperationNode#script-call|script-call]], [[ResultProcessor]], [[ScriptCondition]], [[ScriptDecoder]], [[ScriptEncoder]].

The following table shows the Script element's attributes:
{|class="gvtable"
! Attribute !! Type !! Description
|-
| lang || required || The script engine to use. References a [[GVScriptConfig#ScriptEngines|GVScriptConfig]] Engine.
|-
| base-context || optional || This attribute defines the 'context' to be used for script execution. If not set, the default context is inherited from the specific 'lang' configuration. References a [[GVScriptConfig#BaseContext|GVScriptConfig]] BaseContext.
|-
| file || optional || This attribute is the name of a file containing the script to execute. The file path must be relative to $GV_HOME/scripts.
|}

Following an example of a JavaScript script implementing the toUpperCase service:
<syntaxhighlight lang="xml">
<GVOperationNode class="it.greenvulcano.gvesb.core.flow.GVOperationNode"
id="call_server" id-system="GVESB" input="input"
next-node-id="end" op-type="call"
operation-name="echo_call" output="output"
point-x="186" point-y="152" type="flow-node">
<OutputServices>
<script-service critical="yes" internal="yes" type="service">
<script-call class="it.greenvulcano.gvesb.virtual.internal.ScriptCallOperation"
name="toupper" type="call">
<Script lang="js">data.setObject(data.getObject().toUpperCase());</Script>
</script-call>
</script-service>
</OutputServices>
</GVOperationNode>
</syntaxhighlight>
The previous example using a OGNL script:
<syntaxhighlight lang="xml">
<GVOperationNode class="it.greenvulcano.gvesb.core.flow.GVOperationNode"
id="call_server" id-system="GVESB" input="input"
next-node-id="end" op-type="call"
operation-name="echo_call" output="output"
point-x="186" point-y="152" type="flow-node">
<OutputServices>
<script-service critical="yes" internal="yes" type="service">
<script-call class="it.greenvulcano.gvesb.virtual.internal.ScriptCallOperation"
name="toupper" type="call">
<Script lang="ognl">#data.object = #data.object.toUpperCase()</Script>
</script-call>
</script-service>
</OutputServices>
</GVOperationNode>
</syntaxhighlight>
</div>

@@ Line 11: / Line 11: @@
 Following an example of a script implementing the toUpperCase service:
 <syntaxhighlight lang="xml">
 <GVOperationNode class="it.greenvulcano.gvesb.core.flow.GVOperationNode"
-				 id="call_server" id-system="GVESB" input="input"
+                 id="call_server" id-system="GVESB" input="input"
-				 next-node-id="end" op-type="call"
+                 next-node-id="end" op-type="call"
-				 operation-name="echo_call" output="output"
+                 operation-name="echo_call" output="output"
-				 point-x="186" point-y="152" type="flow-node">
+                 point-x="186" point-y="152" type="flow-node">
-	<OutputServices>
+    <OutputServices>
-		<java-script-service critical="yes" internal="yes" type="service">
+        <java-script-service critical="yes" internal="yes" type="service">
-			<java-script-call class="it.greenvulcano.gvesb.virtual.internal.JSCallOperation"
+            <java-script-call class="it.greenvulcano.gvesb.virtual.internal.JSCallOperation"
-							  name="toupper" type="call">
+                              name="toupper" type="call">
-				<Script>root.setObject(root.getObject().toUpperCase());</Script>
+                <Script>root.setObject(root.getObject().toUpperCase());</Script>
-			</java-script-call>
+            </java-script-call>
-		</java-script-service>
+        </java-script-service>
-	</OutputServices>
+    </OutputServices>
 </GVOperationNode>
 </syntaxhighlight>

Script - Revision history

G.dimaio: /* Description */

G.dimaio: Created page with "==Description== The content defines a JavaScript script. This script is applied to the current GVBuffer object. Within a node ChangeGVBuffer..."

G.dimaio: Created page with "==Description==
The content defines a JavaScript script. This script is applied to the current GVBuffer object. Within a node ChangeGVBuffer..."