--- /dev/null
+package org.apache.maven.archiva.web.validator;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import com.opensymphony.xwork.validator.ValidationException;
+import com.opensymphony.xwork.validator.ValidatorContext;
+import com.opensymphony.xwork.validator.validators.FieldValidatorSupport;
+
+/**
+ * Reused from Continuum crontab validator
+ */
+public class CronExpressionValidator
+ extends FieldValidatorSupport
+{
+ public void validate( Object obj )
+ throws ValidationException
+ {
+ String cron = (String) getFieldValue( "cron", obj );
+
+ org.codehaus.plexus.scheduler.CronExpressionValidator cronExpressionValidator =
+ new org.codehaus.plexus.scheduler.CronExpressionValidator();
+
+ ValidatorContext ctxt = getValidatorContext();
+ if ( !cronExpressionValidator.validate( String.valueOf( cron ) ) )
+ {
+ ctxt.addActionError( "Invalid cron expression value(s)" );
+ return;
+ }
+ }
+}
\ No newline at end of file
--- /dev/null
+<?xml version="1.0" encoding="ISO-8859-1"?>
+<!--
+ ~ Licensed to the Apache Software Foundation (ASF) under one
+ ~ or more contributor license agreements. See the NOTICE file
+ ~ distributed with this work for additional information
+ ~ regarding copyright ownership. The ASF licenses this file
+ ~ to you under the Apache License, Version 2.0 (the
+ ~ "License"); you may not use this file except in compliance
+ ~ with the License. You may obtain a copy of the License at
+ ~
+ ~ http://www.apache.org/licenses/LICENSE-2.0
+ ~
+ ~ Unless required by applicable law or agreed to in writing,
+ ~ software distributed under the License is distributed on an
+ ~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ ~ KIND, either express or implied. See the License for the
+ ~ specific language governing permissions and limitations
+ ~ under the License.
+ -->
+
+<!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0.2//EN"
+ "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">
+<validators>
+ <field name="cron">
+ <field-validator type="requiredstring">
+ <message>You must enter a cron expression.</message>
+ </field-validator>
+ <field-validator type="crontab">
+ <message>Invalid cron expression value(s).</message>
+ </field-validator>
+ </field>
+</validators>
\ No newline at end of file