/*
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* Copyright 2011-17 Fraunhofer ISE, energy & meteo Systems GmbH and other contributors
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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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*/
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package org.openmuc.josistack;
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import java.io.IOException;
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import java.io.InputStream;
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import java.nio.ByteBuffer;
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/**
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* Simple InputStream wrapper around a {@link ByteBuffer} object
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*
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* @author Karsten Mueller-Bier
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*/
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public final class ByteBufferInputStream extends InputStream {
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private final ByteBuffer buf;
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public ByteBufferInputStream(ByteBuffer buf) {
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this.buf = buf;
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}
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@Override
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public int read() throws IOException {
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if (buf.hasRemaining() == false) {
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return -1;
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}
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return buf.get() & 0xFF;
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}
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@Override
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public int read(byte[] b, int off, int len) throws IOException {
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if (buf.hasRemaining() == false) {
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return -1;
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}
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int size = Math.min(len, available());
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buf.get(b, off, size);
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return size;
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}
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@Override
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public int available() throws IOException {
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return buf.limit() - buf.position();
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}
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}
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