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INT-3067 Xslt method=text StringResult coercion

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Previously there was a need to add `result-type="StringResult"`
to <int-xml:xslt-transformer> for xslt output `method='text'`
in case payload was non-standard type (e.g. `File`), if we wanted to get
result as text.

* Add coercion to `StringResult` code, if `Transformer`'s property `method` is 'text' and there is no explicit `resultFactory` provided.
* Add documentation to reference manual

JIRA: https://jira.springsource.org/browse/INT-3067
This commit is contained in:
Artem Bilan
2013-06-18 16:24:21 +03:00
committed by Gunnar Hillert
parent d549734837
commit 41fe514469
7 changed files with 129 additions and 82 deletions
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16
src/reference/docbook/xml.xml
View File

@@ -727,6 +727,22 @@
<classname>String</classname>, the resulting payload will be of type
<classname><ulink url="http://docs.oracle.com/javase/6/docs/api/org/w3c/dom/Document.html">Document</ulink></classname>.
</para>
<para><emphasis>XsltPayloadTransformer and &lt;xsl:output method="text"/&gt;</emphasis></para>
<para><code>&lt;xsl:output method="text"/&gt;</code> tells the XSLT
template to only produce text content from the input source.
In this particuliar case there is no reason to have a
<classname>DomResult</classname>. Therefore, the
<classname><ulink url="http://static.springsource.org/spring-integration/api/org/springframework/integration/xml/transformer/XsltPayloadTransformer.html">XsltPayloadTransformer</ulink></classname>
defaults to <classname>StringResult</classname> if the
<ulink url="http://docs.oracle.com/javase/7/docs/api/javax/xml/transform/Transformer.html#getOutputProperties()">output property</ulink>
called <code>method</code> of the underlying
<classname>javax.xml.transform.Transformer</classname> returns <code>"text"</code>.
This coercion is performed independent from the inbound payload type. Keep
in mind that this <quote>smart</quote> behavior is only available, if the
<code>result-type</code> or <code>result-factory</code> attributes
aren't provided for the respective <code>&lt;int-xml:xslt-transformer&gt;</code>
component.
</para>
</section>
</section>
<section id="xml-xpath-transformer">