Merge branch '__rultor'

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

@@ -0,0 +1,131 @@
+/**
+ * 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.Scalar;
+import org.cactoos.Text;
+import org.cactoos.func.UncheckedScalar;
+
+/**
+ * Extract a substring from a Text.
+ *
+ * <p>There is no thread-safety guarantee.
+ *
+ * @author Fabricio Cabral (fabriciofx@gmail.com)
+ * @version $Id$
+ * @since 0.11
+ */
+public final class SubText implements Text {
+
+    /**
+     * The text.
+     */
+    private final Text origin;
+
+    /**
+     * The start position in the text.
+     */
+    private final UncheckedScalar<Integer> start;
+
+    /**
+     * The end position in the text.
+     */
+    private final UncheckedScalar<Integer> end;
+
+    /**
+     * Ctor.
+     * @param text The String
+     * @param strt Start position in the text
+     */
+    public SubText(final String text, final int strt) {
+        this(new StringAsText(text), strt);
+    }
+
+    /**
+     * Ctor.
+     * @param text The String
+     * @param strt Start position in the text
+     * @param end End position in the text
+     */
+    public SubText(final String text, final int strt, final int end) {
+        this(new StringAsText(text), strt, end);
+    }
+
+    /**
+     * Ctor.
+     * @param text The Text
+     * @param strt Start position in the text
+     */
+    public SubText(final Text text, final int strt) {
+        this(text, () -> strt, () -> text.asString().length());
+    }
+
+    /**
+     * Ctor.
+     * @param text The Text
+     * @param strt Start position in the text
+     * @param end End position in the text
+     */
+    public SubText(final Text text, final int strt, final int end) {
+        this(text, () -> strt, () -> end);
+    }
+
+    /**
+     * Ctor.
+     * @param text The Text
+     * @param strt Start position in the text
+     * @param end End position in the text
+     */
+    public SubText(final Text text, final Scalar<Integer> strt,
+        final Scalar<Integer> end) {
+        this(text, new UncheckedScalar<>(strt), new UncheckedScalar<>(end));
+    }
+
+    /**
+     * Ctor.
+     * @param text The Text
+     * @param strt Start position in the text
+     * @param end End position in the text
+     */
+    public SubText(final Text text, final UncheckedScalar<Integer> strt,
+        final UncheckedScalar<Integer> end) {
+        this.origin = text;
+        this.start = strt;
+        this.end = end;
+    }
+
+    @Override
+    public String asString() throws IOException {
+        return this.origin.asString().substring(
+            this.start.value(),
+            this.end.value()
+        );
+    }
+
+    @Override
+    public int compareTo(final Text text) {
+        return new UncheckedText(this).compareTo(text);
+    }
+}

src/test/java/org/cactoos/text/SubTextTest.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.text;
+
+import org.cactoos.TextHasString;
+import org.hamcrest.MatcherAssert;
+import org.junit.Test;
+
+/**
+ * Test case for {@link SubText}.
+ * @author Fabricio Cabral (fabriciofx@gmail.com)
+ * @version $Id$
+ * @since 0.11
+ * @checkstyle JavadocMethodCheck (500 lines)
+ */
+public final class SubTextTest {
+
+    @Test
+    public void cutTextWithStartAndEnd() {
+        MatcherAssert.assertThat(
+            "Can't cut a text with start and end",
+            // @checkstyle MagicNumber (1 line)
+            new SubText("hello world", 2, 9),
+            new TextHasString("llo wor")
+        );
+    }
+
+    @Test
+    public void cutTextWithStart() {
+        MatcherAssert.assertThat(
+            "Can't cut a text with start",
+            new SubText("cut here", 2),
+            new TextHasString("t here")
+        );
+    }
+
+}