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Published Sep. 10, 2025

Unresolved requirements using a class from util-java in custom development

Written By

Ricardo Couso

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Issue

  • Trying to use a class from /util-java, such as com.liferay.util.Normalizer, in a custom development by adding to build.gradle the dependency
    compileOnly group: "com.liferay.portal", name: "com.liferay.util.java"
    will lead to unresolved requirements such as:
    2021-08-19 09:56:31.228 ERROR [fileinstall-directory-watcher][DirectoryWatcher:1139] Unable to start bundle: file:[...]/testportlet-1.0.0.jar
org.osgi.framework.BundleException: Could not resolve module: test.sample.versions [1591]_  Unresolved requirement: Import-Package: com.liferay.util; version="[10.0.0,11.0.0)"_ [Sanitized]
    at org.eclipse.osgi.container.Module.start(Module.java:444)
    at org.eclipse.osgi.internal.framework.EquinoxBundle.start(EquinoxBundle.java:428)
    at com.liferay.portal.file.install.internal.DirectoryWatcher._startBundle(DirectoryWatcher.java:1122)
    at com.liferay.portal.file.install.internal.DirectoryWatcher._startBundles(DirectoryWatcher.java:1155)
    at com.liferay.portal.file.install.internal.DirectoryWatcher._startAllBundles(DirectoryWatcher.java:1100)
    at com.liferay.portal.file.install.internal.DirectoryWatcher._process(DirectoryWatcher.java:1012)
    at com.liferay.portal.file.install.internal.DirectoryWatcher.run(DirectoryWatcher.java:265)

Environment

  • Liferay DXP 7.3

Resolution

  • To fix this unresolved requirements it's necessary to explicitly include the requirements in the file bnd.bnd, as well as the related dependencies.
  • For the example above the additional lines to include in bnd.bnd would be
    Include-Resource: @com.liferay.util.java-[0-9.]*.jar
Import-Package: \
    !net.fortuna.ical4j.model,\
    !net.fortuna.ical4j.model.property,\
    !org.apache.axis.tools.ant.wsdl,\
    !org.apache.poi.hssf.usermodel,\
    !org.apache.poi.ss.usermodel,\
    *
  • There is a feature request to simplify this: LPS-137726 As a developer I would like to use classes in util-java more easily.
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