001    // Copyright 2011 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.plastic;
016    
017    import java.util.ArrayList;
018    import java.util.List;
019    
020    /**
021     * Stores static context information needed by a transformed PlasticClass; this includes data such as
022     * injections.
023     */
024    public class StaticContext
025    {
026        private final List<Object> values;
027    
028        public StaticContext()
029        {
030            this(new ArrayList<Object>());
031        }
032    
033        private StaticContext(List<Object> values)
034        {
035            this.values = values;
036        }
037    
038        /**
039         * Duplicates this StaticContext, which is used when creating a subclass
040         * of a transformed class.
041         * 
042         * @return new StaticContext with the same values
043         */
044        public StaticContext dupe()
045        {
046            return new StaticContext(new ArrayList<Object>(values));
047        }
048    
049        /** Store a context value and return its index. */
050        public int store(Object value)
051        {
052            values.add(value);
053    
054            return values.size() - 1;
055        }
056    
057        public Object get(int index)
058        {
059            return values.get(index);
060        }
061    
062    }