未定义有效布尔值-XSLT

Question

在对XML文件应用转换时，我得到了这个错误（即，未定义有效的布尔值）。这里有一个奇怪的陷阱：

*我的应用程序从一个文件位置读取500到800个XML文件（XML文件大小范围从几KB到10MB)，然后对每个文件进行转换。最初一切都很顺利，但在一些执行之后，它会在错误下面抛出：

productsfromloc_v3.xsl:
forg0006第651行错误：在xsl:call-template name=“assetstream”（文件://c://app/comp/nfs/services/transformer/productsfromloc_v3.xsl#378)处未定义有效布尔值
（文件://c://app/comp/nfs/services/transformer/productsfromloc_v3.xsl#53)

第651行是:xsl:if test=“fn:string-length（fn:copy-of($vstruct))！=0”

一旦该错误在转换时开始出现，则rest所有转换将导致相同的错误。

如果我选择那些错误的XML文件，然后单独处理，那么根本没有问题。似乎批量XML转换只会导致这个问题。

Java代码：

private byte[] transformFromSource(String urlParams, String xslFullPath, final String uriXSLT,
    final String outputXSLTFilePath, String transformParams, final Object xmlSource,
    final String outputEncoding)
    throws SaxonApiException, MalformedURLException, SystemException, UnsupportedEncodingException {

final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
List<XsltExecutable> xsltExecutables = xsltTemplateManager.getTemplates(windowsOS ? xslFullPath.split("\\\\")[xslFullPath.split("\\\\").length - 1].trim() : xslFullPath.trim());
Processor processor = null;
XdmNode xdmNode = null;
XdmDestination xdmDestination1 = new XdmDestination();
XdmDestination xdmDestination2 = new XdmDestination();
for (XsltExecutable xsltExecutable : xsltExecutables) {
    int i = 0;
    final Xslt30Transformer transformer = xsltExecutable.load30();
    final Map<QName, XdmValue> params = new HashMap<QName, XdmValue>();
    if (StringUtils.isNotBlank(uriXSLT)) {
        params.put(new QName("xslt.location.uriXSLTPath"), new XdmAtomicValue(uriXSLT));
    }
    if (StringUtils.isNotBlank(outputXSLTFilePath)) {
        params.put(new QName("xslt.location.outputXSLTPath"), new XdmAtomicValue(outputXSLTFilePath));
    }
    if (StringUtils.isNotBlank(transformParams)) {
        params.put(new QName("xslt.transform.params"), new XdmAtomicValue(transformParams));
    }
    if (StringUtils.isNotBlank(urlParams)) {
        params.put(new QName("http.query.params"), new XdmAtomicValue(urlParams));
    }
    transformer.setStylesheetParameters(params);
    if (xsltExecutables.size() == 1) {
        processor = xsltExecutable.getProcessor();
        if (xmlSource instanceof File) {
            if (((File) xmlSource).isFile()) {
                String inFile = "<file>" + ((File) xmlSource).getAbsolutePath() + "</file>";
                xdmNode = processor.newDocumentBuilder().build(new StreamSource(new ByteArrayInputStream(inFile.getBytes(outputEncoding))));
            }
        } else {
            xdmNode = processor.newDocumentBuilder().build((StreamSource) xmlSource);
        }
        final Serializer serializer = processor.newSerializer(outputStream);
        /* serializer.setOutputProperty(Serializer.Property.METHOD, "xml"); */
        serializer.setOutputProperty(Serializer.Property.INDENT, "yes");
        serializer.setOutputProperty(Serializer.Property.ENCODING, outputEncoding);
        transformer.applyTemplates(xdmNode, serializer);
    } else if (xsltExecutables.size() > 1 && i == 0) {
        processor = xsltExecutable.getProcessor();
        if (xmlSource instanceof File) {
            xdmNode = processor.newDocumentBuilder().build((File) xmlSource);
        } else {
            xdmNode = processor.newDocumentBuilder().build((StreamSource) xmlSource);
        }
        transformer.applyTemplates(xdmNode, xdmDestination1);
    } else if (xsltExecutables.size() > 1 && i == xsltExecutables.size()) {
        final Serializer serializer = processor.newSerializer(outputStream);
        serializer.setOutputProperty(Serializer.Property.INDENT, "yes");
        serializer.setOutputProperty(Serializer.Property.ENCODING, outputEncoding);
        transformer.applyTemplates(xdmNode, serializer);
        transformer.applyTemplates(xdmDestination2.getXdmNode(), serializer);
    } else if (xsltExecutables.size() > 1 && i > 0) {
        transformer.applyTemplates(xdmDestination1.getXdmNode(), xdmDestination2);
        xdmDestination1 = xdmDestination2;
    }
}
processor = null;
xdmNode = null;
xsltExecutables = null;
return outputStream.toByteArray(); }

导致错误的XSLT部分：

<xsl:iterate select="$STEP/STEP-ProductInformation/Assets/Asset[@UserTypeID='PDF' or @UserTypeID='PNG']">
<xsl:param name="vCount" select="1" as="xs:integer"/>
<xsl:param name="vFileCount" select="1" as="xs:integer"/>
<xsl:param name="vStruct" select="'' " as="xs:string"/>
<xsl:on-completion>
    <xsl:variable name="vFileName" select="concat($outputXSLTFilePath,'/Asset-',$vTimestamp,'-',$vFileCount,$vJMSID,'.xml')"/>
    <xsl:variable name="vResult">
        <map xmlns="http://www.w3.org/2005/xpath-functions">
            <array key="assets">
                <xsl:copy-of select="$vStruct"/>
            </array>
            <string key="locale">
                <xsl:value-of select="$vContextID"/>
            </string>
            <string key="exportTime">
                <xsl:value-of select="$vExportTime"/>
            </string>
        </map>
    </xsl:variable>
    <xsl:if test="fn:string-length( fn:copy-of($vStruct)) ne 0">
        <Payload>
            <ControlData>
                <FeedType>Assets</FeedType>
                <FullImport>
                    <xsl:value-of select="$fullUpload"/>
                </FullImport>
                <Resequencing>true</Resequencing>
                <JMSXGroupID>
                    <xsl:value-of select="$vJMSID"/>
                </JMSXGroupID>
                <JMSXGroupSeq>
                    <xsl:value-of select="$vFileCount"/>
                </JMSXGroupSeq>
                <GroupSize>
                    <xsl:value-of select="$vTotalMessages"/>
                </GroupSize>
                <OutboundQueueName>feeds/out/1.0/products</OutboundQueueName>
            </ControlData>
            <Message id="{$vFileCount}">
                <xsl:value-of select="odfn:JsonBS(xml-to-json($vResult,map{ 'indent':true() }))"/>
            </Message>
        </Payload>
    </xsl:if>
</xsl:on-completion>
<xsl:variable name="vX">
    <map xmlns="http://www.w3.org/2005/xpath-functions">
        <string key="id">
            <xsl:value-of select="@ID"/>
        </string>
        <string key="typeId">
            <xsl:value-of select="@UserTypeID"/>
        </string>
        <string key="filename">
            <xsl:value-of select="./Values/Value[@AttributeID='asset.filename']"/>
        </string>
    </map>
</xsl:variable>
<xsl:variable name="vXS">
    <xsl:copy-of select="$vStruct"/>
    <xsl:copy-of select="$vX"/>
</xsl:variable>
<xsl:choose>
    <xsl:when test="$vCount &lt; 50">
        <xsl:next-iteration>
            <xsl:with-param name="vCount" select="$vCount+1"/>
            <xsl:with-param name="vFileCount" select="$vFileCount"/>
            <xsl:with-param name="vStruct">
                <xsl:copy-of select="$vXS"/>
            </xsl:with-param>
        </xsl:next-iteration>
    </xsl:when>
    <xsl:otherwise>
        <xsl:variable name="vFileName" select="concat($outputXSLTFilePath,'/Asset-',$vTimestamp,'-',$vFileCount,$vJMSID,'.xml')"/>
        <xsl:variable name="vResult">
            <map xmlns="http://www.w3.org/2005/xpath-functions">
                <array key="assets">
                    <xsl:copy-of select="$vXS"/>
                </array>
                <string key="locale">
                    <xsl:value-of select="$vContextID"/>
                </string>
                <string key="exportTime">
                    <xsl:value-of select="$vExportTime"/>
                </string>
            </map>
        </xsl:variable>
        <Payload>
            <ControlData>
                <FeedType>Assets</FeedType>
                <FullImport>
                    <xsl:value-of select="$fullUpload"/>
                </FullImport>
                <Resequencing>true</Resequencing>
                <JMSXGroupID>
                    <xsl:value-of select="$vJMSID"/>
                </JMSXGroupID>
                <JMSXGroupSeq>
                    <xsl:value-of select="$vFileCount"/>
                </JMSXGroupSeq>
                <GroupSize>
                    <xsl:value-of select="$vTotalMessages"/>
                </GroupSize>
                <OutboundQueueName>feeds/out/1.0/products</OutboundQueueName>
            </ControlData>
            <Message id="{$vFileCount}">
                <xsl:value-of select="odfn:JsonBS(xml-to-json($vResult,map{ 'indent':true() }))"/>
            </Message>
        </Payload>
        <xsl:next-iteration>
            <xsl:with-param name="vCount" select="1"/>
            <xsl:with-param name="vFileCount" select="$vFileCount+1"/>
            <xsl:with-param name="vStruct" select="''"/>
            <!-- blank -->
        </xsl:next-iteration>
    </xsl:otherwise>
</xsl:choose>

Answer 1

作为实验，请关闭字节码生成。(featurekeys.generate_byte_code)

字节码生成是在构造执行一定次数后开始的，这与您的观察一致，即只有在运行一定次数的转换后才会出现失败，如果单独运行这些转换则不会出现失败。

我认为这个问题很有可能是由不正确的字节码生成引起的。如果事实证明是这样，我们显然希望您帮助我们找到实际的bug（而不是仅仅解决它）：为此，尝试以较低的字节码生成阈值运行，以便它更快地发挥作用(featurekeys.theshold_for_hotspot_bytecode)。