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src/java/org/apache/poi/util/IOUtils.java
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src/java/org/apache/poi/util/IOUtils.java
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/* ====================================================================
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* The Apache Software License, Version 1.1
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*
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* Copyright (c) 2002 The Apache Software Foundation. All rights
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* reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. The end-user documentation included with the redistribution,
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* if any, must include the following acknowledgment:
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* "This product includes software developed by the
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* Apache Software Foundation (http://www.apache.org/)."
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* Alternately, this acknowledgment may appear in the software itself,
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* if and wherever such third-party acknowledgments normally appear.
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*
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* 4. The names "Apache" and "Apache Software Foundation" and
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* "Apache POI" must not be used to endorse or promote products
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* derived from this software without prior written permission. For
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* written permission, please contact apache@apache.org.
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*
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* 5. Products derived from this software may not be called "Apache",
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* "Apache POI", nor may "Apache" appear in their name, without
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* prior written permission of the Apache Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*/
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package org.apache.poi.util;
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import java.io.IOException;
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import java.io.InputStream;
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public class IOUtils
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{
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private IOUtils()
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{
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}
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/**
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* Helper method, just calls <tt>readFully(in, b, 0, b.length)</tt>
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*/
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public static int readFully(InputStream in, byte[] b)
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throws IOException
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{
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return readFully(in, b, 0, b.length);
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}
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/**
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* Same as the normal <tt>in.read(b, off, len)</tt>, but tries to ensure that
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* the entire len number of bytes is read.
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* <p>
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* If the end of file is reached before any bytes are read, returns -1.
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* Otherwise, returns the number of bytes read.
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*/
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public static int readFully(InputStream in, byte[] b, int off, int len)
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throws IOException
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{
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int total = 0;
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for (;;) {
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int got = in.read(b, off + total, len - total);
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if (got < 0) {
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return (total == 0) ? -1 : total;
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} else {
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total += got;
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if (total == len)
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return total;
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}
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}
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}
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}
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/* ====================================================================
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* The Apache Software License, Version 1.1
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*
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* Copyright (c) 2002 The Apache Software Foundation. All rights
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* reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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|
* modification, are permitted provided that the following conditions
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* are met:
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|
*
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* 1. Redistributions of source code must retain the above copyright
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|
* notice, this list of conditions and the following disclaimer.
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|
*
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|
* 2. Redistributions in binary form must reproduce the above copyright
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|
* notice, this list of conditions and the following disclaimer in
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|
* the documentation and/or other materials provided with the
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|
* distribution.
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*
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|
* 3. The end-user documentation included with the redistribution,
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|
* if any, must include the following acknowledgment:
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|
* "This product includes software developed by the
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|
* Apache Software Foundation (http://www.apache.org/)."
|
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|
* Alternately, this acknowledgment may appear in the software itself,
|
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|
* if and wherever such third-party acknowledgments normally appear.
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|
*
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|
* 4. The names "Apache" and "Apache Software Foundation" and
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|
* "Apache POI" must not be used to endorse or promote products
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|
* derived from this software without prior written permission. For
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|
* written permission, please contact apache@apache.org.
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|
*
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|
* 5. Products derived from this software may not be called "Apache",
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|
* "Apache POI", nor may "Apache" appear in their name, without
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|
* prior written permission of the Apache Software Foundation.
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|
*
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|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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|
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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|
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* ====================================================================
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*
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|
* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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*/
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package org.apache.poi.poifs.filesystem;
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import java.io.*;
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import java.util.Random;
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/**
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* Returns a random amount of requested data. Used to check conformance with
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* InputStream API contracts.
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*/
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public class SlowInputStream extends FilterInputStream
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{
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private Random r = new Random(0);
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public SlowInputStream(InputStream in) {
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super(in);
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}
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public int read(byte[] b, int off, int len) throws IOException {
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return super.read(b, off, r.nextInt(len) + 1);
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}
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}
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