40 lines
1.3 KiB
Kotlin
40 lines
1.3 KiB
Kotlin
// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
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//
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// SPDX-License-Identifier: Apache-2.0
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package org.pgpainless.decryption_verification.cleartext_signatures
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import java.io.*
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/**
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* Implementation of the [MultiPassStrategy]. When processing signed data the first time, the data
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* is being written out into a file. For the second pass, that file is being read again.
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*
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* This strategy is recommended when larger amounts of data need to be processed. For smaller files,
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* [InMemoryMultiPassStrategy] yields higher efficiency.
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*
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* @param file file to write the data to and read from
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*/
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class WriteToFileMultiPassStrategy(private val file: File) : MultiPassStrategy {
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override val messageOutputStream: OutputStream
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@Throws(IOException::class)
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get() {
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if (!file.exists()) {
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if (!file.createNewFile()) {
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throw IOException("New file '${file.absolutePath}' could not be created.")
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}
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}
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return FileOutputStream(file)
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}
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override val messageInputStream: InputStream
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@Throws(IOException::class)
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get() {
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if (!file.exists()) {
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throw IOException("File '${file.absolutePath}' does no longer exist.")
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}
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return FileInputStream(file)
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}
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}
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