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    
015    package org.apache.tapestry5.internal.services;
016    
017    import org.apache.tapestry5.Asset2;
018    
019    /**
020     * Base class for assets.
021     *
022     * @since 5.1.0.0
023     */
024    public abstract class AbstractAsset implements Asset2
025    {
026        private final boolean invariant;
027    
028        public AbstractAsset(boolean invariant)
029        {
030            this.invariant = invariant;
031        }
032    
033        public boolean isInvariant()
034        {
035            return invariant;
036        }
037    
038        /**
039         * Returns {@link org.apache.tapestry5.Asset#toClientURL()}.
040         */
041        @Override
042        public String toString()
043        {
044            return toClientURL();
045        }
046    }