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
015package org.apache.tapestry5.internal.plastic;
016
017import java.util.ArrayList;
018import java.util.List;
019
020/**
021 * Stores static context information needed by a transformed PlasticClass; this includes data such as
022 * injections.
023 */
024public 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}