yegor256#205: JoinedText

src/main/java/org/cactoos/text/JoinedText.java

@@ -0,0 +1,113 @@
+/**
+ * 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.text;
+
+import java.io.IOException;
+import java.util.StringJoiner;
+import org.cactoos.Text;
+import org.cactoos.list.ArrayAsIterable;
+import org.cactoos.list.MappedIterable;
+
+/**
+ * Join a Text.
+ *
+ * <p>There is no thread-safety guarantee.
+ *
+ * @author Fabricio Cabral ([email protected])
+ * @version $Id$
+ * @since 0.9
+ */
+public final class JoinedText implements Text {
+
+    /**
+     * The texts.
+     */
+    private final Iterable<Text> texts;
+
+    /**
+     * The delimiter.
+     */
+    private final Text delimiter;
+
+    /**
+     * Ctor.
+     * @param delimiter Delimit among texts
+     * @param texts Texts to be joined
+     */
+    public JoinedText(final String delimiter, final String... texts) {
+        this(
+            new StringAsText(delimiter),
+            new MappedIterable<>(
+                new ArrayAsIterable<>(texts),
+                text -> new StringAsText(text)
+            )
+        );
+    }
+
+    /**
+     * Ctor.
+     * @param delimiter Delimit among texts
+     * @param texts Texts to be joined
+     */
+    public JoinedText(final String delimiter, final Text... texts) {
+        this(delimiter, new ArrayAsIterable<>(texts));
+    }
+
+    /**
+     * Ctor.
+     * @param delimiter Delimit among texts
+     * @param texts Texts to be joined
+     */
+    public JoinedText(final String delimiter, final Iterable<Text> texts) {
+        this(new StringAsText(delimiter), texts);
+    }
+
+    /**
+     * Ctor.
+     * @param delimiter Delimit among texts
+     * @param texts Texts to be joined
+     */
+    public JoinedText(final Text delimiter, final Text... texts) {
+        this(delimiter, new ArrayAsIterable<>(texts));
+    }
+
+    /**
+     * Ctor.
+     * @param delimiter Delimit among texts
+     * @param texts Texts to be joined
+     */
+    public JoinedText(final Text delimiter, final Iterable<Text> texts) {
+        this.delimiter = delimiter;
+        this.texts = texts;
+    }
+
+    @Override
+    public String asString() throws IOException {
+        final StringJoiner joint = new StringJoiner(this.delimiter.asString());
+        for (final Text text : this.texts) {
+            joint.add(text.asString());
+        }
+        return joint.toString();
+    }
+}

src/test/java/org/cactoos/text/JoinedTextTest.java

@@ -0,0 +1,64 @@
+/**
+ * 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.text;
+
+import java.io.IOException;
+import org.cactoos.TextHasString;
+import org.hamcrest.MatcherAssert;
+import org.junit.Test;
+
+/**
+ * Test case for {@link JoinedText}.
+ * @author Fabricio Cabral ([email protected])
+ * @version $Id$
+ * @since 0.9
+ * @checkstyle JavadocMethodCheck (500 lines)
+ */
+public final class JoinedTextTest {
+
+    @Test
+    @SuppressWarnings("PMD.AvoidDuplicateLiterals")
+    public void joinsStrings() throws IOException {
+        MatcherAssert.assertThat(
+            "Can't join strings",
+            new JoinedText(" ", "hello", "world"),
+            new TextHasString("hello world")
+        );
+    }
+
+    @Test
+    @SuppressWarnings("PMD.AvoidDuplicateLiterals")
+    public void joinsTexts() throws IOException {
+        MatcherAssert.assertThat(
+            "Can't join texts",
+            new JoinedText(
+                " ",
+                new StringAsText("hello"),
+                new StringAsText("world")
+            ),
+            new TextHasString("hello world")
+        );
+    }
+
+}