Implement "save" and "load"

1 files changed, 51 insertions, 0 deletions

diff --git a/src/rejava/io/StringReader.java b/src/rejava/io/StringReader.java
new file mode 100644
index 0000000..dc39769
--- /dev/null
+++ b/src/rejava/io/StringReader.java
@@ -0,0 +1,51 @@
+package rejava.io;
+
+/**
+ * A minimal subset of java.io.StringReader.
+ * (http://hg.openjdk.java.net/jdk7/jdk7
+ * /jdk/file/9b8c96f96a0f/src/share/classes/java/io/StringReader.java)
+ * 
+ * @author Pacien TRAN-GIRARD
+ */
+public class StringReader extends Reader {
+
+        private final String str;
+        private int index;
+
+        public StringReader(final String str) {
+                this.str = str;
+        }
+
+        @Override
+        public int read() {
+                if (this.str == null) {
+                        return -1;
+                }
+                if (this.index >= this.str.length()) {
+                        return -1;
+                }
+                this.index++;
+                return this.str.charAt(this.index);
+        }
+
+        @Override
+        public int read(final char[] cbuf, final int off, final int len) {
+                if ((off < 0) || (off > cbuf.length) || (len < 0) || ((off + len) > cbuf.length) || ((off + len) < 0)) {
+                        throw new IndexOutOfBoundsException();
+                }
+                if (len == 0) {
+                        return 0;
+                }
+                if (this.str == null) {
+                        return -1;
+                }
+                if (this.index >= this.str.length()) {
+                        return -1;
+                }
+                final int n = Math.min(this.str.length() - this.index, len);
+                this.str.getChars(this.index, this.index + n, cbuf, off);
+                this.index += n;
+                return n;
+        }
+
+}
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