    001    // Copyright 2009 The Apache Software Foundation
    002    //
    003    // Licensed under the Apache License, Version 2.0 (the "License");
    004    // you may not use this file except in compliance with the License.
    005    // You may obtain a copy of the License at
    006    //
    007    //     http://www.apache.org/licenses/LICENSE-2.0
    008    //
    009    // Unless required by applicable law or agreed to in writing, software
    010    // distributed under the License is distributed on an "AS IS" BASIS,
    011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012    // See the License for the specific language governing permissions and
    013    // limitations under the License.
    014    package org.apache.tapestry5.ioc;
    015
    016    import java.util.ArrayList;
    017    import java.util.List;
    018
    019    /**
    020     * Represents an order constraints for {@link OrderedConfiguration}.
    021     *
    022     * @since 5.2.0.0
    023     */
    024    public class OrderConstraint
    025    {
    026        private static final String ALL = "*";
    027
    028        private List<String> constraints = new ArrayList<String>();
    029
    030        /**
    031         * Adds an <i>after:id</i> constraint.
    032         */
    033        public OrderConstraint after(String id)
    034        {
    035            constraints.add("after:" + id);
    036
    037            return this;
    038        }
    039
    040        /**
    041         * Adds an <i>after:*</i> constraint.
    042         */
    043        public OrderConstraint afterAll()
    044        {
    045            return after(ALL);
    046        }
    047        /**
    048         * Adds a <i>before:id</i> constraint.
    049         */
    050        public OrderConstraint before(String id)
    051        {
    052            constraints.add("before:" + id);
    053
    054            return this;
    055        }
    056
    057        /**
    058         * Adds a <i>before:*</i> constraint.
    059         */
    060        public OrderConstraint beforeAll()
    061        {
    062            return before(ALL);
    063        }
    064
    065        /**
    066         * Returns all constraints as array of strings.
    067         */
    068        public String[] build()
    069        {
    070            return constraints.toArray(new String[]{});
    071        }
    072    }