jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/xml/internal/ws/util/ReadAllStream.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/xml/internal/ws/util/ReadAllStream.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/xml/internal/ws/util/ReadAllStream.java

Thu, 31 Aug 2017 15:18:52 +0800

author: aoqi
date: Thu, 31 Aug 2017 15:18:52 +0800
changeset 637: 9c07ef4934dd
parent 368: 0989ad8c0860
parent 0: 373ffda63c9a
permissions: -rw-r--r--

merge

 /*
  * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package com.sun.xml.internal.ws.util;
 import com.sun.istack.internal.NotNull;
 import com.sun.istack.internal.Nullable;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 /**
  * Reads a input stream completely and creates a new stream
  * by keeping some data in memory and the rest on the file system.
  *
  * @author Jitendra Kotamraju
  */
 public class ReadAllStream extends InputStream {
     private final @NotNull MemoryStream memStream;
     private final @NotNull FileStream fileStream;
     private boolean readAll;
     private boolean closed;
     private static final Logger LOGGER = Logger.getLogger(ReadAllStream.class.getName());
     public ReadAllStream() {
         memStream = new MemoryStream();
         fileStream = new FileStream();
     }
     /**
      * Reads the data from input stream completely. It keeps
      * inMemory size in the memory, and the rest on the file
      * system.
      *
      * Caller's responsibility to close the InputStream. This
      * method can be called only once.
      *
      * @param in from which to be read
      * @param inMemory this much data is kept in the memory
      * @throws IOException in case of exception
      */
     public void readAll(InputStream in, long inMemory) throws IOException {
         assert !readAll;
         readAll = true;
         boolean eof = memStream.readAll(in, inMemory);
         if (!eof) {
             fileStream.readAll(in);
         }
     }
     @Override
     public int read() throws IOException {
         int ch = memStream.read();
         if (ch == -1) {
             ch = fileStream.read();
         }
         return ch;
     }
     @Override
     public int read(byte b[], int off, int sz) throws IOException {
         int len = memStream.read(b, off, sz);
         if (len == -1) {
             len = fileStream.read(b, off, sz);
         }
         return len;
     }
     @Override
     public void close() throws IOException {
         if (!closed) {
             memStream.close();
             fileStream.close();
             closed = true;
         }
     }
     // Keeps the rest of the data on the file system
     private static class FileStream extends InputStream {
         private @Nullable File tempFile;
         private @Nullable FileInputStream fin;
         void readAll(InputStream in) throws IOException {
             tempFile = File.createTempFile("jaxws",".bin");
             FileOutputStream fileOut = new FileOutputStream(tempFile);
             try {
                 byte[] buf = new byte[8192];
                 int len;
                 while((len=in.read(buf)) != -1) {
                     fileOut.write(buf, 0, len);
                 }
             } finally {
                 fileOut.close();
             }
             fin = new FileInputStream(tempFile);
         }
         @Override
         public int read() throws IOException {
             return (fin != null) ? fin.read() : -1;
         }
         @Override
         public int read(byte b[], int off, int sz) throws IOException {
             return (fin != null) ? fin.read(b, off, sz) : -1;
         }
         @Override
         public void close() throws IOException {
             if (fin != null) {
                 fin.close();
             }
             if (tempFile != null) {
                 boolean success = tempFile.delete();
                 if (!success) {
                     LOGGER.log(Level.INFO, "File {0} could not be deleted", tempFile);
                 }
             }
         }
     }
     // Keeps data in memory until certain size
     private static class MemoryStream extends InputStream {
         private Chunk head, tail;
         private int curOff;
         private void add(byte[] buf, int len) {
             if (tail != null) {
                 tail = tail.createNext(buf, 0, len);
             } else {
                 head = tail = new Chunk(buf, 0, len);
             }
         }
         /**
          * Reads until the size specified
          *
          * @param in stream from which to be read
          * @param inMemory reads until this size
          * @return true if eof
          *         false otherwise
          * @throws IOException in case of exception
          */
         boolean readAll(InputStream in, long inMemory) throws IOException {
             long total = 0;
             while(true) {
                 byte[] buf = new byte[8192];
                 int read = fill(in, buf);
                 total += read;
                 if (read != 0) {
                     add(buf, read);
                 }
                 if (read != buf.length) {
                     return true;
                 }        // EOF
                 if (total > inMemory) {
                     return false; // Reached in-memory size
                 }
             }
         }
         private int fill(InputStream in, byte[] buf) throws IOException {
             int read;
             int total = 0;
             while(total < buf.length && (read=in.read(buf, total, buf.length-total)) != -1) {
                 total += read;
             }
             return total;
         }
         @Override
         public int read() throws IOException {
             if (!fetch()) {
                 return -1;
             }
             return (head.buf[curOff++] & 0xff);
         }
         @Override
         public int read(byte b[], int off, int sz) throws IOException {
             if (!fetch()) {
                 return -1;
             }
             sz = Math.min(sz, head.len-(curOff-head.off));
             System.arraycopy(head.buf,curOff,b,off,sz);
             curOff += sz;
             return sz;
         }
         // if eof, return false else true
         private boolean fetch() {
             if (head == null) {
                 return false;
             }
             if (curOff == head.off+head.len) {
                 head = head.next;
                 if (head == null) {
                     return false;
                 }
                 curOff = head.off;
             }
             return true;
         }
         private static final class Chunk {
             Chunk next;
             final byte[] buf;
             final int off;
             final int len;
             public Chunk(byte[] buf, int off, int len) {
                 this.buf = buf;
                 this.off = off;
                 this.len = len;
             }
             public Chunk createNext(byte[] buf, int off, int len) {
                 return next = new Chunk(buf, off, len);
             }
         }
     }
 }

Mercurial > jdk8-mips64-public > jaxws / annotate

src/share/jaxws_classes/com/sun/xml/internal/ws/util/ReadAllStream.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/xml/internal/ws/util/ReadAllStream.java