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By default, all mapping elements inherit their namespace (or lack thereof) from their parent.
When a namespace is declared, the local name and namespace must match when unmarshalling XML, and appropriate namespace declarations are included when marshalling bean objects.
For example, let's suppose our employee file contains namespaces as shown below.
is set to '*', any namespace is allowed when unmarshalling XML, and no namespace declaration will be made when marshalling XML.
Bean IO supports several common field validation rules when reading an input stream.
All field validation rules are validated against the field text before type conversion.
For example, if the name of the root element in the previous example's employee file is changed from "employee File" to "employees", and "title" was renamed "position", the mapping file could be updated as shown below.
attribute on any mapping component (stream, group, record, segment or field).
Field validations are ignored when writing to an output stream.JDK 1.5 users will need to include the following: Next, let's suppose we want to read records into the following Java bean for further processing.Remember that a Java bean must have a default no-argument constructor and public getters and setters for all exposed properties.Record level error messages are retrieved using the following prioritized list of keys.
If a message is not configured under the name of the first key, the next key will be tried until a message is found, or a default message is used.For this reason, when unmarshalling untrusted sources, it is recommended that you read the stream twice, using the first pass to validate the integrity of the file including syntax, record identification, record ordering, possible header/trailer counts, etc.