001    // Copyright 2004, 2005 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    
015    package org.apache.tapestry.spec;
016    
017    import org.apache.hivemind.Locatable;
018    import org.apache.hivemind.LocationHolder;
019    
020    /**
021     * Stores a binding specification, which identifies the static value or OGNL expression for the
022     * binding. The name of the binding (which matches a bindable property of the contined component) is
023     * implicitly known.
024     * 
025     * @author glongman@intelligentworks.com
026     */
027    public interface IBindingSpecification extends LocationHolder, Locatable
028    {
029        /**
030         * Returns the type of binding specification; this is generally
031         * {@link org.apache.tapestry.spec.BindingType#PREFIXED}.
032         */
033    
034        public BindingType getType();
035    
036        /**
037         * For a prefixed binding specification (the typical type), the value is a binding reference; a
038         * string used to contruct the actual binding, and consists of a prefix (such as "ognl:" or
039         * "message:") and a locator. The prefix selects a
040         * {@link org.apache.tapestry.binding.BindingFactory}, and the locator is passed to the
041         * factory, which uses it to construct the {@link org.apache.tapestry.IBinding}instance.
042         */
043    
044        public String getValue();
045    
046        public void setType(BindingType type);
047    
048        public void setValue(String value);
049    }