Merge branch '__rultor'

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

@@ -0,0 +1,87 @@
+/**
+ * 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.IOException;
+import java.io.InputStream;
+import org.cactoos.Input;
+import org.cactoos.text.Sprintf;
+
+/**
+ * Jar class resource.
+ *
+ * @author Kirill (g4s8.public@gmail.com)
+ * @version $Id$
+ * @see ClassLoader#getResource(String)
+ * @since 0.1
+ */
+public final class ResourceAsInput implements Input {
+
+    /**
+     * Resource name.
+     */
+    private final String res;
+
+    /**
+     * Resource class loader.
+     */
+    private final ClassLoader loader;
+
+    /**
+     * New resource input with current context {@link ClassLoader}.
+     *
+     * @param res Resource name
+     */
+    public ResourceAsInput(final String res) {
+        this(
+            res,
+            Thread.currentThread().getContextClassLoader()
+        );
+    }
+
+    /**
+     * New resource input with specified {@link ClassLoader}.
+     *
+     * @param res Resource name
+     * @param loader Resource class loader
+     */
+    public ResourceAsInput(final String res, final ClassLoader loader) {
+        this.res = res;
+        this.loader = loader;
+    }
+
+    @Override
+    public InputStream open() throws IOException {
+        final InputStream input = this.loader.getResourceAsStream(this.res);
+        if (input == null) {
+            throw new IOException(
+                new Sprintf(
+                    "Resource '%s' was not found",
+                    this.res
+                ).toString()
+            );
+        }
+        return input;
+    }
+}

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

@@ -0,0 +1,66 @@
+/**
+ * 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.util.Arrays;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.Test;
+
+/**
+ * Test case for {@link ResourceAsInput}.
+ *
+ * @author Kirill (g4s8.public@gmail.com)
+ * @version $Id$
+ * @since 0.1
+ */
+public final class ResourceAsInputTest {
+
+    /**
+     * Test built-in resource.
+     *
+     * @throws Exception if failed
+     */
+    @Test
+    public void readResourceTest() throws Exception {
+        MatcherAssert.assertThat(
+            Arrays.copyOfRange(
+                new InputAsBytes(
+                    new ResourceAsInput(
+                        "org/cactoos/io/ResourceAsInputTest.class"
+                    )
+                ).asBytes(),
+                // @checkstyle MagicNumber (2 lines)
+                0,
+                4
+            ),
+            Matchers.equalTo(
+                new byte[]{
+                    // @checkstyle MagicNumber (1 line)
+                    (byte) 0xCA, (byte) 0xFE, (byte) 0xBA, (byte) 0xBE,
+                }
+            )
+        );
+    }
+}