    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.
    014package org.apache.tapestry5.ioc;
    015
    016import java.util.ArrayList;
    017import java.util.List;
    018
    019/**
    020 * Represents an order constraints for {@link OrderedConfiguration}.
    021 *
    022 * @since 5.2.0.0
    023 */
    024public 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}