ByteSourceArray.java
/*
* 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.commons.imaging.bytesource;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.Arrays;
import org.apache.commons.imaging.ImagingException;
class ByteSourceArray extends ByteSource {
private final byte[] bytes;
ByteSourceArray(final byte[] bytes, final String fileName) {
super(fileName);
this.bytes = bytes;
}
@Override
public byte[] getByteArray(final long from, final int length) throws ImagingException {
int start;
try {
start = Math.toIntExact(from);
} catch (final ArithmeticException e) {
throw new ImagingException(e);
}
// We include a separate check for int overflow.
if ((start < 0) || (length < 0) || (start + length < 0)
|| (start + length > bytes.length)) {
throw new ImagingException("Could not read block (block start: " + start
+ ", block length: " + length + ", data length: "
+ bytes.length + ").");
}
return Arrays.copyOfRange(bytes, start, start + length);
}
@Override
public InputStream getInputStream() {
return new ByteArrayInputStream(bytes);
}
@Override
public long size() {
return bytes.length;
}
}