| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| package org.apache.royale.compiler.internal.scopes; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| |
| import org.apache.royale.compiler.definitions.IDefinition; |
| import org.apache.royale.compiler.scopes.IDefinitionSet; |
| |
| /** |
| * An implementation of {@link IDefinitionStore} that stores no definitions. |
| * Many scopes do not need to store any definitions. |
| * (For example, consider a typical getter.) |
| * <p> |
| * If scopes always have a non-null store, it makes the code simpler. |
| * However, every empty store behaves the same and therefore scopes with |
| * empty stores all share the singleton instance provided by |
| * {@code EmptyDefinitionStore.SINGLETON}. |
| */ |
| public final class EmptyDefinitionStore implements IDefinitionStore |
| { |
| /** |
| * The singleton instance of this class. |
| */ |
| public static final IDefinitionStore SINGLETON = new EmptyDefinitionStore(); |
| |
| // Private constructor |
| private EmptyDefinitionStore() |
| { |
| } |
| |
| @Override |
| public int getCapacity() |
| { |
| return 0; |
| } |
| |
| @Override |
| public IDefinitionStore createLargerStore() |
| { |
| return new SmallDefinitionStore1(); |
| } |
| |
| @Override |
| public boolean add(IDefinition definition) |
| { |
| return false; |
| } |
| |
| @Override |
| public boolean remove(IDefinition definition) |
| { |
| return false; |
| } |
| |
| @Override |
| public IDefinitionSet getDefinitionSetByName(String baseName) |
| { |
| return null; |
| } |
| |
| @Override |
| public void putDefinitionSetByName(String baseName, IDefinitionSet set) |
| { |
| } |
| |
| @Override |
| public Collection<String> getAllNames() |
| { |
| return Collections.emptyList(); |
| } |
| |
| @Override |
| public Collection<IDefinitionSet> getAllDefinitionSets() |
| { |
| return Collections.emptyList(); |
| } |
| |
| @Override |
| public Collection<IDefinition> getAllDefinitions() |
| { |
| return Collections.emptyList(); |
| } |
| } |