#24 Create PartOfSpeech interface

src/main/java/org/tendiwa/inflectible/PartOfSpeech.java

@@ -0,0 +1,53 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015 Georgy Vlasov
+ *
+ * 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 NONINFRINGEMENT. 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.tendiwa.inflectible;
+
+/**
+ * A part of speech is a category of words which have similar grammatical
+ * properties. Words that are assigned to the same part of speech generally
+ * display similar behavior in terms of syntax—they play similar roles within
+ * the grammatical structure of sentences—and sometimes in terms of morphology,
+ * in that they undergo inflection for similar properties.
+ * <p/>
+ * For example, in English, noun, verb and adjective are some of the parts of
+ * speech.
+ * @see <a href="https://en.wikipedia.org/wiki/Part_of_speech">Part of speech
+ *  article on Wikipedia</a>
+ * @author Georgy Vlasov ([email protected])
+ * @version $Id$
+ * @since 0.2.0
+ */
+public interface PartOfSpeech {
+    /**
+     * Checks if this part of speech uses a particular grammatical category.
+     * <p>For example, in English language, both nouns and verbs use the
+     * grammatical number, but only verbs use grammatical tense.
+     * @param category Grammatical category
+     * @return True iff this part of speech uses a particular grammatical
+     *  category.
+     * @throws Exception If could not determine if this part of speech uses a
+     *  category or not
+     */
+    boolean usesCategory(GrammaticalCategory category) throws Exception;
+}