Merge branch '__rultor'

src/main/java/org/cactoos/io/ReaderAsInput.java

@@ -0,0 +1,106 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Yegor Bugayenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.cactoos.io;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.Reader;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import org.cactoos.Input;
+
+/**
+ * Reader as {@link Input}.
+ *
+ * <p>There is no thread-safety guarantee.
+ *
+ * @author Yegor Bugayenko ([email protected])
+ * @version $Id$
+ * @since 0.12
+ */
+public final class ReaderAsInput implements Input {
+
+    /**
+     * The reader.
+     */
+    private final Reader reader;
+
+    /**
+     * The charset.
+     */
+    private final Charset charset;
+
+    /**
+     * The buffer size.
+     */
+    private final int size;
+
+    /**
+     * Ctor.
+     * @param rdr Reader
+     */
+    public ReaderAsInput(final Reader rdr) {
+        this(rdr, StandardCharsets.UTF_8);
+    }
+
+    /**
+     * Ctor.
+     * @param rdr Reader
+     * @param cset Charset
+     */
+    public ReaderAsInput(final Reader rdr, final Charset cset) {
+        // @checkstyle MagicNumber (1 line)
+        this(rdr, cset, 16 << 10);
+    }
+
+    /**
+     * Ctor.
+     * @param rdr Reader
+     * @param cset Charset
+     * @param max Buffer size
+     */
+    public ReaderAsInput(final Reader rdr, final Charset cset, final int max) {
+        this.reader = rdr;
+        this.charset = cset;
+        this.size = max;
+    }
+
+    @Override
+    public InputStream stream() throws IOException {
+        final char[] buffer = new char[this.size];
+        final StringBuilder builder = new StringBuilder();
+        while (true) {
+            final int done = this.reader.read(buffer, 0, buffer.length);
+            if (done < 0) {
+                break;
+            }
+            builder.append(buffer, 0, done);
+        }
+        return new ByteArrayInputStream(
+            builder.toString().getBytes(this.charset)
+        );
+    }
+
+}

src/test/java/org/cactoos/io/ReaderAsInputTest.java

@@ -0,0 +1,58 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Yegor Bugayenko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.cactoos.io;
+
+import java.io.StringReader;
+import org.cactoos.text.BytesAsText;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.Test;
+
+/**
+ * Test case for {@link ReaderAsInput}.
+ *
+ * @author Kirill ([email protected])
+ * @version $Id$
+ * @since 0.12
+ * @checkstyle JavadocMethodCheck (500 lines)
+ */
+public final class ReaderAsInputTest {
+
+    @Test
+    public void readsString() throws Exception {
+        final String source = "hello, друг!";
+        MatcherAssert.assertThat(
+            "Can't read string through a reader",
+            new BytesAsText(
+                new InputAsBytes(
+                    new ReaderAsInput(
+                        new StringReader(source)
+                    )
+                )
+            ).asString(),
+            Matchers.equalTo(source)
+        );
+    }
+
+}