78 lines
2.3 KiB
Kotlin
78 lines
2.3 KiB
Kotlin
/*
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* Copyright 2023 dorkbox, llc
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dorkbox.cabParser.extractor
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import dorkbox.cabParser.CabStreamSaver
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import dorkbox.cabParser.structure.CabFileEntry
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import java.io.ByteArrayOutputStream
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import java.io.File
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import java.io.OutputStream
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/**
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* Implementation of [CabStreamSaver] that filters files to extract.
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* [CabFileFilter] and saves them using [CabFileSaver].
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*/
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class FilteredCabStreamSaver(
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/**
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* defines how to save the [ByteArrayOutputStream] corresponding to [CabFileEntry]
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*/
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val saver: CabFileSaver = DefaultCabFileSaver(null),
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/**
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* which files to extract (extract all files if `null`)
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*/
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val filter: CabFileFilter = CabFilePatternFilter(".+")) : CabStreamSaver {
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/**
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* To save some files to defined extract directory.
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*
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* @param extractDirectory directory to extract files (no sub-directory will be created)
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* @param filter which files to extract (extract all files if `null`)
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*/
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constructor(extractDirectory: File?, filter: CabFileFilter) : this(DefaultCabFileSaver(extractDirectory), filter)
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override fun closeOutputStream(outputStream: OutputStream, entry: CabFileEntry) {
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saver.save(outputStream as ByteArrayOutputStream, entry)
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}
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override fun openOutputStream(entry: CabFileEntry): OutputStream? {
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return if (filter.test(entry)) {
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ByteArrayOutputStream(entry.size.toInt())
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}
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else {
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null
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}
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}
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override fun saveReservedAreaData(data: ByteArray?, dataLength: Int): Boolean {
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return false
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}
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/**
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* @return amount successfully saved files
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*/
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val succeeded: Int
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get() = saver.succeeded
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/**
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* @return amount of failed save attempts
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*/
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val failed: Int
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get() = saver.failed
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}
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