Apache Maven Filtering

This component has been built from the filtering process/code in Maven Resources Plugin.

The goal is to provide a shared component for all plugins that needs to filter resources.

MavenResourcesExecution

POM Interpolation

POM values will be interpolated only with expressions starting with pom or project (it's configurable). In previous versions something like ${foo.version} or ${version} was interpolated with the current POM version, but it won't be interpolated with a POM value any more.

Escaping Interpolation

It's possible now to define a String which will escape interpolation. \${java.home} will be interpolated to ${java.home}.

targetPath parameter

It also accepts absolute paths.

overwrite parameter

The parameter overwrite forces file copy even if the destination file is newer.

MavenResourcesFiltering

This component will apply filtering on a List of org.apache.maven.model.Resources.

If you want to use the default List of FileUtils.FilterWrapper (see below) you should use the method without the filterWrappers parameter.

The component will not filter a predefined set of file extensions (jpg, jpeg, gif, bmp, png).

Note: You can easily add extra file extensions.

MavenFileFilter

This component has a method which returns the default FileUtils.FilterWrappers. These are:

  • Interpolation with token ${ } and values from properties files, <project>/<build>/<filters, project.properties and mavenSession.executionProperties
  • Interpolation with token @ @ and values from properties files, <project>/<build>/<filters, project.properties and mavenSession.executionProperties
  • Interpolation with token ${ } and values from mavenProject interpolation
  • Interpolation with token @ @ and values from mavenProject interpolation

The values used for interpolation are stored in a Properties object and are loaded in the following order:

  • A List of properties files, provided as a parameter to the method
  • Filters defined in the <build>/<filters> section of the POM
  • Properties defined in the <properties> section of the POM
  • The executionProperties from the current MavenSession

Note: As it's a Properties object, the last defined key/value pair wins.

Note: When building the Properties object and reading the properties files that defines the different filters, interpolation with the token ${ } is supported for these filters with limited properties values coming from project.properties and mavenSession.executionProperties. The last wins here too.