| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * Licensed 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 com.intellij.util.io; |
| |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.io.File; |
| import java.io.IOException; |
| |
| public class PersistentStringEnumerator extends PersistentEnumeratorDelegate<String> implements AbstractStringEnumerator { |
| @Nullable private final CachingEnumerator<String> myCache; |
| |
| public PersistentStringEnumerator(@NotNull final File file) throws IOException { |
| this(file, null); |
| } |
| |
| public PersistentStringEnumerator(@NotNull final File file, @Nullable PagedFileStorage.StorageLockContext storageLockContext) throws IOException { |
| this(file, 1024 * 4, storageLockContext); |
| } |
| |
| public PersistentStringEnumerator(@NotNull final File file, boolean cacheLastMappings) throws IOException { |
| this(file, 1024 * 4, cacheLastMappings, null); |
| } |
| |
| public PersistentStringEnumerator(@NotNull final File file, final int initialSize) throws IOException { |
| this(file, initialSize, null); |
| } |
| |
| public PersistentStringEnumerator(@NotNull final File file, |
| final int initialSize, |
| @Nullable PagedFileStorage.StorageLockContext lockContext) throws IOException { |
| this(file, initialSize, false, lockContext); |
| } |
| |
| private PersistentStringEnumerator(@NotNull final File file, |
| final int initialSize, |
| boolean cacheLastMappings, |
| @Nullable PagedFileStorage.StorageLockContext lockContext) throws IOException { |
| super(file, EnumeratorStringDescriptor.INSTANCE, initialSize, lockContext); |
| myCache = cacheLastMappings ? new CachingEnumerator<String>(new DataEnumerator<String>() { |
| @Override |
| public int enumerate(@Nullable String value) throws IOException { |
| return PersistentStringEnumerator.super.enumerate(value); |
| } |
| |
| @Nullable |
| @Override |
| public String valueOf(int idx) throws IOException { |
| return PersistentStringEnumerator.super.valueOf(idx); |
| } |
| }, EnumeratorStringDescriptor.INSTANCE) : null; |
| } |
| |
| @Override |
| public int enumerate(@Nullable String value) throws IOException { |
| return myCache != null ? myCache.enumerate(value) : super.enumerate(value); |
| } |
| |
| @Nullable |
| @Override |
| public String valueOf(int idx) throws IOException { |
| return myCache != null ? myCache.valueOf(idx) : super.valueOf(idx); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| super.close(); |
| if (myCache != null) myCache.close(); |
| } |
| |
| @Override |
| public void markCorrupted() { |
| myEnumerator.markCorrupted(); |
| } |
| } |