001// Copyright 2006 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 015package org.apache.tapestry5.services; 016 017import org.apache.tapestry5.Binding; 018import org.apache.tapestry5.ComponentResources; 019import org.apache.tapestry5.ioc.Location; 020 021/** 022 * Creates a binding of a particular type. This is usually invoked from the {@link 023 * org.apache.tapestry5.services.BindingSource} service. 024 */ 025public interface BindingFactory 026{ 027 /** 028 * Creates a new binding instance. 029 * <p/> 030 * The binding represents a connection between the container and the component (the component is usually the child 031 * of the component, though in a few cases, it is the component itself). In most cases, the expression is evaluated 032 * in terms of the resources of the <em>container</em> and the component is ignored. 033 * 034 * @param description of the binding, such as, "parameter foo" 035 * @param container the component, as represented by its resources, for which a binding is to be created. 036 * @param component the component whose parameter is to be bound by the resulting binding (rarely used) 037 * @param expression 038 * @param location from which the binding was generate, or null if not known 039 * @return the new binding instance 040 */ 041 Binding newBinding(String description, ComponentResources container, ComponentResources component, 042 String expression, Location location); 043}