| // Copyright 2004 The Apache Software Foundation |
| // |
| // Licensed 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. |
| |
| package org.apache.tapestry.engine; |
| |
| /** |
| * Define a link that may be generated as part of a page render. The vast majority |
| * of links are tied to {@link IEngineService services} and are, in |
| * fact, callbacks. A small number, such as those generated by |
| * {@link org.apache.tapestry.link.GenericLink} component, are to arbitrary locations. |
| * In addition, ILink differentiates between the path portion of the link, and any |
| * query parameters encoded into a link, primarily to benefit {@link org.apache.tapestry.form.Form}, |
| * which needs to encode the query parameters as hidden form fields. |
| * |
| * <p> |
| * In addition, an ILink is responsible for |
| * passing constructed URLs through |
| * {@link org.apache.tapestry.IRequestCycle#encodeURL(String)} |
| * as needed. |
| * |
| * @author Howard Lewis Ship |
| * @version $Id$ |
| * @since 3.0 |
| * |
| **/ |
| |
| public interface ILink |
| { |
| /** |
| * Returns the relative URL as a String. A relative |
| * URL may include a leading slash, but omits |
| * the scheme, host and port portions of a full URL. |
| * |
| * @return the relative URL, with no anchor, but including |
| * query parameters. |
| * |
| **/ |
| |
| public String getURL(); |
| |
| /** |
| * Returns the relative URL as a String. This is used |
| * for most links. |
| * |
| * @param anchor if not null, appended to the URL |
| * @param includeParameters if true, parameters are included |
| * |
| **/ |
| |
| public String getURL(String anchor, boolean includeParameters); |
| |
| /** |
| * Returns the absolute URL as a String, using |
| * default scheme, server and port, including |
| * parameters, and no anchor. |
| * |
| **/ |
| |
| public String getAbsoluteURL(); |
| |
| /** |
| * Returns the absolute URL as a String. |
| * |
| * @param scheme if not null, overrides the default scheme. |
| * @param server if not null, overrides the default server |
| * @param port if non-zero, overrides the default port |
| * @param anchor if not null, appended to the URL |
| * @param includeParameters if true, parameters are included |
| * |
| **/ |
| |
| public String getAbsoluteURL( |
| String scheme, |
| String server, |
| int port, |
| String anchor, |
| boolean includeParameters); |
| |
| /** |
| * |
| * Returns an array of parameters names (in |
| * no specified order). |
| * |
| * @see #getParameterValues(String) |
| * |
| **/ |
| |
| public String[] getParameterNames(); |
| |
| /** |
| * Returns the values for the named parameter. |
| * |
| * @throws IllegalArgumentException if the |
| * link does not define values for the |
| * specified name. |
| * |
| **/ |
| |
| public String[] getParameterValues(String name); |
| } |