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src/java.base/share/classes/java/nio/file/Files.java

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rev 51958 : 8211122: Reduce the number of internal classes made accessible to jdk.unsupported
Reviewed-by: alanb, dfuchs, kvn


3111      *          installed, the {@link SecurityManager#checkRead(String) checkRead}
3112      *          method is invoked to check read access to the file.
3113      */
3114     public static long copy(Path source, OutputStream out) throws IOException {
3115         // ensure not null before opening file
3116         Objects.requireNonNull(out);
3117 
3118         try (InputStream in = newInputStream(source)) {
3119             return in.transferTo(out);
3120         }
3121     }
3122 
3123     /**
3124      * The maximum size of array to allocate.
3125      * Some VMs reserve some header words in an array.
3126      * Attempts to allocate larger arrays may result in
3127      * OutOfMemoryError: Requested array size exceeds VM limit
3128      */
3129     private static final int MAX_BUFFER_SIZE = Integer.MAX_VALUE - 8;
3130 
3131     private static final jdk.internal.misc.JavaLangAccess JLA =
3132             jdk.internal.misc.SharedSecrets.getJavaLangAccess();
3133 
3134     /**
3135      * Reads all the bytes from an input stream. Uses {@code initialSize} as a hint
3136      * about how many bytes the stream will have.
3137      *
3138      * @param   source
3139      *          the input stream to read from
3140      * @param   initialSize
3141      *          the initial size of the byte array to allocate
3142      *
3143      * @return  a byte array containing the bytes read from the file
3144      *
3145      * @throws  IOException
3146      *          if an I/O error occurs reading from the stream
3147      * @throws  OutOfMemoryError
3148      *          if an array of the required size cannot be allocated
3149      */
3150     private static byte[] read(InputStream source, int initialSize) throws IOException {
3151         int capacity = initialSize;
3152         byte[] buf = new byte[capacity];




3111      *          installed, the {@link SecurityManager#checkRead(String) checkRead}
3112      *          method is invoked to check read access to the file.
3113      */
3114     public static long copy(Path source, OutputStream out) throws IOException {
3115         // ensure not null before opening file
3116         Objects.requireNonNull(out);
3117 
3118         try (InputStream in = newInputStream(source)) {
3119             return in.transferTo(out);
3120         }
3121     }
3122 
3123     /**
3124      * The maximum size of array to allocate.
3125      * Some VMs reserve some header words in an array.
3126      * Attempts to allocate larger arrays may result in
3127      * OutOfMemoryError: Requested array size exceeds VM limit
3128      */
3129     private static final int MAX_BUFFER_SIZE = Integer.MAX_VALUE - 8;
3130 
3131     private static final jdk.internal.access.JavaLangAccess JLA =
3132             jdk.internal.access.SharedSecrets.getJavaLangAccess();
3133 
3134     /**
3135      * Reads all the bytes from an input stream. Uses {@code initialSize} as a hint
3136      * about how many bytes the stream will have.
3137      *
3138      * @param   source
3139      *          the input stream to read from
3140      * @param   initialSize
3141      *          the initial size of the byte array to allocate
3142      *
3143      * @return  a byte array containing the bytes read from the file
3144      *
3145      * @throws  IOException
3146      *          if an I/O error occurs reading from the stream
3147      * @throws  OutOfMemoryError
3148      *          if an array of the required size cannot be allocated
3149      */
3150     private static byte[] read(InputStream source, int initialSize) throws IOException {
3151         int capacity = initialSize;
3152         byte[] buf = new byte[capacity];


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