--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/classes/java/io/StringWriter.java Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,236 @@
+/*
+ * Copyright (c) 1996, 2004, 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 <tt>StringWriter</tt> has no effect. The methods in this class
+ * can be called after the stream has been closed without generating an
+ * <tt>IOException</tt>.
+ *
+ * @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 <tt>char</tt> values that will fit into this buffer
+ * before it is automatically expanded
+ *
+ * @throws IllegalArgumentException
+ * If <tt>initialSize</tt> 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
+ */
+ 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
+ */
+ public void write(String str, int off, int len) {
+ buf.append(str.substring(off, off + len));
+ }
+
+ /**
+ * Appends the specified character sequence to this writer.
+ *
+ * <p> An invocation of this method of the form <tt>out.append(csq)</tt>
+ * behaves in exactly the same way as the invocation
+ *
+ * <pre>
+ * out.write(csq.toString()) </pre>
+ *
+ * <p> Depending on the specification of <tt>toString</tt> for the
+ * character sequence <tt>csq</tt>, the entire sequence may not be
+ * appended. For instance, invoking the <tt>toString</tt> 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 <tt>csq</tt> is
+ * <tt>null</tt>, then the four characters <tt>"null"</tt> are
+ * appended to this writer.
+ *
+ * @return This writer
+ *
+ * @since 1.5
+ */
+ public StringWriter append(CharSequence csq) {
+ if (csq == null)
+ write("null");
+ else
+ write(csq.toString());
+ return this;
+ }
+
+ /**
+ * Appends a subsequence of the specified character sequence to this writer.
+ *
+ * <p> An invocation of this method of the form <tt>out.append(csq, start,
+ * end)</tt> when <tt>csq</tt> is not <tt>null</tt>, behaves in
+ * exactly the same way as the invocation
+ *
+ * <pre>
+ * out.write(csq.subSequence(start, end).toString()) </pre>
+ *
+ * @param csq
+ * The character sequence from which a subsequence will be
+ * appended. If <tt>csq</tt> is <tt>null</tt>, then characters
+ * will be appended as if <tt>csq</tt> contained the four
+ * characters <tt>"null"</tt>.
+ *
+ * @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 <tt>start</tt> or <tt>end</tt> are negative, <tt>start</tt>
+ * is greater than <tt>end</tt>, or <tt>end</tt> is greater than
+ * <tt>csq.length()</tt>
+ *
+ * @since 1.5
+ */
+ public StringWriter append(CharSequence csq, int start, int end) {
+ CharSequence cs = (csq == null ? "null" : csq);
+ write(cs.subSequence(start, end).toString());
+ return this;
+ }
+
+ /**
+ * Appends the specified character to this writer.
+ *
+ * <p> An invocation of this method of the form <tt>out.append(c)</tt>
+ * 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 <tt>StringWriter</tt> has no effect. The methods in this
+ * class can be called after the stream has been closed without generating
+ * an <tt>IOException</tt>.
+ */
+ public void close() throws IOException {
+ }
+
+}