Camel Validator return entire message - apache-camel

Question

I have a route,
<from uri="a">
<to uri="validator:schema.xsd">
<to uri="b">
Say the XML file being validated is missing two elements, the validator seems to stop once it finds the first missing element and returns a message saying it was missing.
Is it possible to carry on validating the XML file to look for any other missing elements and return that in the error message so the sender doesn't have to keep sending to find out which elements are missing or invalid?

Answer 1

Validator component throws SchemaValidationException, if validation fails. This exception contains method getError() returning List<org.xml.sax.SAXParseException>.
You can use this to transform message to List<org.xml.sax.SAXParseException> in onException block.
Following code catches SchemaValidationException, transforms body to SchemaValidationException.getErrors() and marks exception as continued, to continue routing and return this list on output route.
from("timer:simple?period=1000")
.setBody(constant(XML_INVALID))
.to("direct:a");
from("direct:a")
.onException(SchemaValidationException.class)
.to("direct:validationErrors")
.continued(true)
.end()
.to("validator:test.xsd")
.to("log:result");
from("direct:validationErrors")
.setBody(simple("${property.CamelExceptionCaught.errors}"))
.end();
Note: This example was tested with following resources
XML_INVALID
<?xml version="1.0" encoding="utf-8"?>
<shiporder orderid="str1234">
<orderperson>str1234</orderperson>
<shipto>
<name>str1234</name>
<address>str1234</address>
</shipto>
<item>
<quantity>745</quantity>
<price>123.45</price>
</item>
</shiporder>
test.xsd copied from w3schools.com
<?xml version="1.0" encoding="UTF-8" ?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<!-- definition of simple elements -->
<xs:element name="orderperson" type="xs:string"/>
<xs:element name="name" type="xs:string"/>
<xs:element name="address" type="xs:string"/>
<xs:element name="city" type="xs:string"/>
<xs:element name="country" type="xs:string"/>
<xs:element name="title" type="xs:string"/>
<xs:element name="note" type="xs:string"/>
<xs:element name="quantity" type="xs:positiveInteger"/>
<xs:element name="price" type="xs:decimal"/>
<!-- definition of attributes -->
<xs:attribute name="orderid" type="xs:string"/>
<!-- definition of complex elements -->
<xs:element name="shipto">
<xs:complexType>
<xs:sequence>
<xs:element ref="name"/>
<xs:element ref="address"/>
<xs:element ref="city"/>
<xs:element ref="country"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="item">
<xs:complexType>
<xs:sequence>
<xs:element ref="title"/>
<xs:element ref="note" minOccurs="0"/>
<xs:element ref="quantity"/>
<xs:element ref="price"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="shiporder">
<xs:complexType>
<xs:sequence>
<xs:element ref="orderperson"/>
<xs:element ref="shipto"/>
<xs:element ref="item" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute ref="orderid" use="required"/>
</xs:complexType>
</xs:element>
</xs:schema>