8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/java.base/share/classes/java/io/StringWriter.java

@@ -0,0 +1,244 @@
+/*
+ * Copyright (c) 1996, 2016, 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 java.io;
+
+
+/**
+ * A character stream that collects its output in a string buffer, which can
+ * then be used to construct a string.
+ * <p>
+ * Closing a {@code StringWriter} has no effect. The methods in this class
+ * can be called after the stream has been closed without generating an
+ * {@code IOException}.
+ *
+ * @author      Mark Reinhold
+ * @since       1.1
+ */
+
+public class StringWriter extends Writer {
+
+    private StringBuffer buf;
+
+    /**
+     * Create a new string writer using the default initial string-buffer
+     * size.
+     */
+    public StringWriter() {
+        buf = new StringBuffer();
+        lock = buf;
+    }
+
+    /**
+     * Create a new string writer using the specified initial string-buffer
+     * size.
+     *
+     * @param initialSize
+     *        The number of {@code char} values that will fit into this buffer
+     *        before it is automatically expanded
+     *
+     * @throws IllegalArgumentException
+     *         If {@code initialSize} is negative
+     */
+    public StringWriter(int initialSize) {
+        if (initialSize < 0) {
+            throw new IllegalArgumentException("Negative buffer size");
+        }
+        buf = new StringBuffer(initialSize);
+        lock = buf;
+    }
+
+    /**
+     * Write a single character.
+     */
+    public void write(int c) {
+        buf.append((char) c);
+    }
+
+    /**
+     * Write a portion of an array of characters.
+     *
+     * @param  cbuf  Array of characters
+     * @param  off   Offset from which to start writing characters
+     * @param  len   Number of characters to write
+     *
+     * @throws  IndexOutOfBoundsException
+     *          If {@code off} is negative, or {@code len} is negative,
+     *          or {@code off + len} is negative or greater than the length
+     *          of the given array
+     */
+    public void write(char cbuf[], int off, int len) {
+        if ((off < 0) || (off > cbuf.length) || (len < 0) ||
+            ((off + len) > cbuf.length) || ((off + len) < 0)) {
+            throw new IndexOutOfBoundsException();
+        } else if (len == 0) {
+            return;
+        }
+        buf.append(cbuf, off, len);
+    }
+
+    /**
+     * Write a string.
+     */
+    public void write(String str) {
+        buf.append(str);
+    }
+
+    /**
+     * Write a portion of a string.
+     *
+     * @param  str  String to be written
+     * @param  off  Offset from which to start writing characters
+     * @param  len  Number of characters to write
+     *
+     * @throws  IndexOutOfBoundsException
+     *          If {@code off} is negative, or {@code len} is negative,
+     *          or {@code off + len} is negative or greater than the length
+     *          of the given string
+     */
+    public void write(String str, int off, int len)  {
+        buf.append(str, off, off + len);
+    }
+
+    /**
+     * Appends the specified character sequence to this writer.
+     *
+     * <p> An invocation of this method of the form {@code out.append(csq)}
+     * behaves in exactly the same way as the invocation
+     *
+     * <pre>
+     *     out.write(csq.toString()) </pre>
+     *
+     * <p> Depending on the specification of {@code toString} for the
+     * character sequence {@code csq}, the entire sequence may not be
+     * appended. For instance, invoking the {@code toString} method of a
+     * character buffer will return a subsequence whose content depends upon
+     * the buffer's position and limit.
+     *
+     * @param  csq
+     *         The character sequence to append.  If {@code csq} is
+     *         {@code null}, then the four characters {@code "null"} are
+     *         appended to this writer.
+     *
+     * @return  This writer
+     *
+     * @since  1.5
+     */
+    public StringWriter append(CharSequence csq) {
+        write(String.valueOf(csq));
+        return this;
+    }
+
+    /**
+     * Appends a subsequence of the specified character sequence to this writer.
+     *
+     * <p> An invocation of this method of the form
+     * {@code out.append(csq, start, end)} when {@code csq}
+     * is not {@code null}, behaves in
+     * exactly the same way as the invocation
+     *
+     * <pre>{@code
+     *     out.write(csq.subSequence(start, end).toString())
+     * }</pre>
+     *
+     * @param  csq
+     *         The character sequence from which a subsequence will be
+     *         appended.  If {@code csq} is {@code null}, then characters
+     *         will be appended as if {@code csq} contained the four
+     *         characters {@code "null"}.
+     *
+     * @param  start
+     *         The index of the first character in the subsequence
+     *
+     * @param  end
+     *         The index of the character following the last character in the
+     *         subsequence
+     *
+     * @return  This writer
+     *
+     * @throws  IndexOutOfBoundsException
+     *          If {@code start} or {@code end} are negative, {@code start}
+     *          is greater than {@code end}, or {@code end} is greater than
+     *          {@code csq.length()}
+     *
+     * @since  1.5
+     */
+    public StringWriter append(CharSequence csq, int start, int end) {
+        if (csq == null) csq = "null";
+        return append(csq.subSequence(start, end));
+    }
+
+    /**
+     * Appends the specified character to this writer.
+     *
+     * <p> An invocation of this method of the form {@code out.append(c)}
+     * behaves in exactly the same way as the invocation
+     *
+     * <pre>
+     *     out.write(c) </pre>
+     *
+     * @param  c
+     *         The 16-bit character to append
+     *
+     * @return  This writer
+     *
+     * @since 1.5
+     */
+    public StringWriter append(char c) {
+        write(c);
+        return this;
+    }
+
+    /**
+     * Return the buffer's current value as a string.
+     */
+    public String toString() {
+        return buf.toString();
+    }
+
+    /**
+     * Return the string buffer itself.
+     *
+     * @return StringBuffer holding the current buffer value.
+     */
+    public StringBuffer getBuffer() {
+        return buf;
+    }
+
+    /**
+     * Flush the stream.
+     */
+    public void flush() {
+    }
+
+    /**
+     * Closing a {@code StringWriter} has no effect. The methods in this
+     * class can be called after the stream has been closed without generating
+     * an {@code IOException}.
+     */
+    public void close() throws IOException {
+    }
+
+}