Using "doXslTransform": About Remove A Subelement from An Parent Element

[王雷 <ma...@gmail.com>]

Hi,

    I have quest about removing a subelement from an Parent Element from an
XML data structure using doXslTransform. The BPEL process is defined as the
following:

testRemove.bpel+++++++++++++++++++++++++++++++
<bpel:process name="testRemove"
    targetNamespace="http://de.fhg.ipsi.oasys.businessScenario.sample"
    suppressJoinFailure="yes" xmlns:tns="
http://de.fhg.ipsi.oasys.businessScenario.sample"
    xmlns:bpel="http://docs.oasis-open.org/wsbpel/2.0/process/executable">
    <bpel:import location="testRemoveArtifacts.wsdl"
        namespace="http://de.fhg.ipsi.oasys.businessScenario.sample"
        importType="http://schemas.xmlsoap.org/wsdl/" />
    <bpel:partnerLinks>
        <bpel:partnerLink name="client" partnerLinkType="tns:testRemove"
            myRole="testRemoveProvider" />
    </bpel:partnerLinks>
    <bpel:variables>
        <bpel:variable name="input"
messageType="tns:testRemoveRequestMessage" />
        <bpel:variable name="output"
messageType="tns:testRemoveResponseMessage" />
        <bpel:variable name="cartItemRemove" element="tns:cartItem" />
        <bpel:variable name="cartInfo" element="tns:cartInfoElement" />
    </bpel:variables>
    <bpel:sequence name="main">
        <bpel:receive name="receiveInput" partnerLink="client"
            portType="tns:testRemove" operation="process" variable="input"
            createInstance="yes" />
        <bpel:assign>
            <bpel:copy>
                <bpel:from>
                    <bpel:literal>
                        <tns:cartItem bookID="1" customerID="1"
                            xmlns:tns="
http://de.fhg.ipsi.oasys.businessScenario.sample"
                            xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance">
                            <tns:amountToBuy>2.0</tns:amountToBuy>
                            <tns:action>1</tns:action>
                        </tns:cartItem>
                    </bpel:literal>
                </bpel:from>
                <bpel:to variable="cartItemRemove" />
            </bpel:copy>
            <bpel:copy>
                <bpel:from>
                    <bpel:literal>
                        <tns:cartInfoElement xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance"
                            xmlns:tns="
http://de.fhg.ipsi.oasys.businessScenario.sample">
                            <tns:cartItem bookID="1" customerID="1">
                                <tns:amountToBuy>2.0</tns:amountToBuy>
                                <tns:action>1</tns:action>
                            </tns:cartItem>
                            <tns:cartItem bookID="2" customerID="2">
                                <tns:amountToBuy>2.0</tns:amountToBuy>
                                <tns:action>1</tns:action>
                            </tns:cartItem>
                            <tns:cartItem bookID="3" customerID="3">
                                <tns:amountToBuy>2.0</tns:amountToBuy>
                                <tns:action>1</tns:action>
                            </tns:cartItem>
                            <tns:cartItem bookID="4" customerID="4">
                                <tns:amountToBuy>2.0</tns:amountToBuy>
                                <tns:action>1</tns:action>
                            </tns:cartItem>
                            <tns:cartItem bookID="5" customerID="5">
                                <tns:amountToBuy>2.0</tns:amountToBuy>
                                <tns:action>1</tns:action>
                            </tns:cartItem>
                        </tns:cartInfoElement>
                    </bpel:literal>
                </bpel:from>
                <bpel:to variable="cartInfo" />
            </bpel:copy>
            <bpel:copy>

<bpel:from>bpel:doXslTransform("test3.xsl",$cartInfo,"cartItem",
                    $cartItemRemove)
                </bpel:from>
                <bpel:to variable="cartInfo" />
            </bpel:copy>
            <bpel:copy>
                <bpel:from>
                    <bpel:literal>
                        <tns:testRemoveResponse
                            xmlns:tns="
http://de.fhg.ipsi.oasys.businessScenario.sample"
                            xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance">
                            <tns:result>tns:result</tns:result>
                        </tns:testRemoveResponse>
                    </bpel:literal>
                </bpel:from>
                <bpel:to variable="output" part="payload" />
            </bpel:copy>
        </bpel:assign>
        <bpel:reply name="replyOutput" partnerLink="client"
            portType="tns:testRemove" operation="process" variable="output"
/>
    </bpel:sequence>
</bpel:process>

corresponding WSDL is the following:
testRemoveArtifacts.wsdl++++++++++++++++++++++++++++++
<?xml version="1.0"?>
<definitions name="testRemove"
    targetNamespace="http://de.fhg.ipsi.oasys.businessScenario.sample"
    xmlns:tns="http://de.fhg.ipsi.oasys.businessScenario.sample"
    xmlns:plnk="http://docs.oasis-open.org/wsbpel/2.0/plnktype" xmlns="
http://schemas.xmlsoap.org/wsdl/"
    xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/">
    <types>
        <schema attributeFormDefault="unqualified"
elementFormDefault="qualified"
            targetNamespace="
http://de.fhg.ipsi.oasys.businessScenario.sample"
            xmlns="http://www.w3.org/2001/XMLSchema">
            <element name="testRemoveRequest">
                <complexType>
                    <sequence>
                        <element name="input" type="string" />
                    </sequence>
                </complexType>
            </element>
            <element name="testRemoveResponse">
                <complexType>
                    <sequence>
                        <element name="result" type="string" />
                    </sequence>
                </complexType>
            </element>

            <complexType name="cartItemType">
                <sequence>
                    <element name="amountToBuy" type="int" />
                    <element name="action" type="string" />
                </sequence>
                <attribute name="bookID" type="string" />
                <attribute name="customerID" type="string" />
            </complexType>
            <element name="cartItem" type="tns:cartItemType" />
            <element name="cartInfoElement">
                <complexType>
                    <sequence>
                        <element name="cartItem" type="tns:cartItemType"
                            minOccurs="0" maxOccurs="unbounded" />
                    </sequence>
                </complexType>
            </element>
        </schema>
    </types>
    <message name="testRemoveRequestMessage">
        <part name="payload" element="tns:testRemoveRequest" />
    </message>
    <message name="testRemoveResponseMessage">
        <part name="payload" element="tns:testRemoveResponse" />
    </message>
    <portType name="testRemove">
        <operation name="process">
            <input message="tns:testRemoveRequestMessage" />
            <output message="tns:testRemoveResponseMessage" />
        </operation>
    </portType>
    <plnk:partnerLinkType name="testRemove">
        <plnk:role name="testRemoveProvider" portType="tns:testRemove" />
    </plnk:partnerLinkType>
    <binding name="testRemoveBinding" type="tns:testRemove">
        <soap:binding style="document"
            transport="http://schemas.xmlsoap.org/soap/http" />
        <operation name="process">
            <soap:operation
                soapAction="
http://de.fhg.ipsi.oasys.businessScenario.sample/process" />
            <input>
                <soap:body use="literal" />
            </input>
            <output>
                <soap:body use="literal" />
            </output>
        </operation>
    </binding>
    <service name="testRemove">
        <port name="testRemovePort" binding="tns:testRemoveBinding">
            <soap:address location="
http://166.111.94.232:8080/ode/processes/testRemove" />
        </port>
    </service>
</definitions>


The test3.xsl referred by the BPEL file is the following:
test3.xsl++++++++++++++++++++++++++++++++++++++++++++
<xsl:stylesheet version="1.0"
    xmlns:tns="http://de.fhg.ipsi.oasys.businessScenario.sample" xmlns:xsl="
http://www.w3.org/1999/XSL/Transform"
    xmlns:exslt="http://exslt.org/common">
    <xsl:param name="cartItem">
        <tns:cartItem bookID="1" customerID="1"
            xmlns:tns="http://de.fhg.ipsi.oasys.businessScenario.sample"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
            <tns:amountToBuy>2.0</tns:amountToBuy>
            <tns:action>1</tns:action>
        </tns:cartItem>
    </xsl:param>
    <xsl:template match="tns:cartInfoElement">
        <xsl:element name="tns:cartInfoElement">
            <xsl:copy-of select="./@*" />
            <xsl:for-each select="*">
                <xsl:variable name="comparison">
                    <xsl:apply-templates select="." mode="compare">
                        <xsl:with-param name="part"
select="exslt:node-set($cartItem)" />
                    </xsl:apply-templates>
                </xsl:variable>
                <xsl:if test="contains($comparison,'false')">
                    <xsl:copy-of select="." />
                </xsl:if>
            </xsl:for-each>
        </xsl:element>
    </xsl:template>
    <xsl:template match="*" mode="compare">
        <xsl:param name="part" />
        <xsl:variable name="name" select="name(.)" />
        <!-- xsl:value-of select="name(.)" />|<xsl:value-of
select="name($part/*[name()=$name])"
            /> # -->
        <xsl:choose>
            <xsl:when test="not($part/*[name()=$name])">
                false
            </xsl:when>
            <xsl:otherwise>
                <xsl:apply-templates select="./@*" mode="compare">
                    <xsl:with-param name="part"
select="$part/*[name()=$name]" />
                </xsl:apply-templates>
                <xsl:apply-templates select="./*" mode="compare">
                    <xsl:with-param name="part"
select="$part/*[name()=$name]" />
                </xsl:apply-templates>
            </xsl:otherwise>
        </xsl:choose>
    </xsl:template>
    <xsl:template match="@*" mode="compare">
        <xsl:param name="part" />
        <xsl:variable name="name" select="name(.)" />
        <!-- @<xsl:value-of select="name(.)" />|<xsl:value-of
select="name($part/@*[name()=$name])"
            /># -->
        <xsl:choose>
            <xsl:when test="not($part/@*[name()=$name])">
                false
            </xsl:when>
            <xsl:otherwise>
                <xsl:if test="$part/@*[name()=$name]!=.">
                    false
                </xsl:if>
            </xsl:otherwise>
        </xsl:choose>
    </xsl:template>
</xsl:stylesheet>

After the execution of the BPEL process, the bpel process instance executed
successfully without reporting any error, however, the cartItemRemove
element is NOT removed from cartInfoElement.
If I test the xsl from my eclipse:  Run As->XSL Transformation, the
cartItemRemove element can be removed from cartInfoElement.
I will appreciate it very much if you can help fixing this, because I got
stuck here for several days. Thanks.


            Lei Wang