adding english version

git-svn-id: https://russianmorphology.googlecode.com/svn/trunk@57 d817d54c-26ab-11de-abc9-2f7d1455ff7a

english/src/main/java/org/apache/lucene/morpholgy/english/EnglishLetterDecoderEncoder.java

@@ -0,0 +1,116 @@
+/**
+ * Copyright 2009 Alexander Kuznetsov
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.lucene.morpholgy.english;
+
+import org.apache.lucene.morphology.LetterDecoderEncoder;
+import org.apache.lucene.morphology.SuffixToLongException;
+import org.apache.lucene.morphology.WrongCharaterException;
+
+import java.util.ArrayList;
+
+
+//todo extract supper class for common method with russian letter decoder
+public class EnglishLetterDecoderEncoder implements LetterDecoderEncoder {
+    public static final int ENGLISH_SMALL_LETTER_OFFSET = 96;
+    static public int SUFFIX_LENGTH = 6;
+    public static final int DASH_CHAR = 45;
+    public static final int DASH_CODE = 27;
+
+    public Integer encode(String string) {
+        if (string.length() > 6) throw new SuffixToLongException("Suffix length should not be greater then " + 12);
+        int result = 0;
+        for (int i = 0; i < string.length(); i++) {
+            int c = 0 + string.charAt(i) - ENGLISH_SMALL_LETTER_OFFSET;
+            if (c == 45 - ENGLISH_SMALL_LETTER_OFFSET) {
+                c = DASH_CODE;
+            }
+            if (c < 0 || c > 27)
+                throw new WrongCharaterException("Symblo " + string.charAt(i) + " is not small cirillic letter");
+            result = result * 28 + c;
+        }
+        for (int i = string.length(); i < 6; i++) {
+            result *= 28;
+        }
+        return result;
+    }
+
+    public int[] encodeToArray(String s) {
+
+        ArrayList<Integer> integers = new ArrayList<Integer>();
+        while (s.length() > 6) {
+            integers.add(encode(s.substring(0, 6)));
+            s = s.substring(6);
+        }
+        integers.add(encode(s));
+        int[] ints = new int[integers.size()];
+        int pos = 0;
+        for (Integer i : integers) {
+            ints[pos] = i;
+            pos++;
+        }
+        return ints;
+    }
+
+    public String decodeArray(int[] array) {
+        String result = "";
+        for (int i : array) {
+            result += decode(i);
+        }
+        return result;
+    }
+
+
+    public String decode(Integer suffixN) {
+        String result = "";
+        while (suffixN > 27) {
+            int c = suffixN % 28 + ENGLISH_SMALL_LETTER_OFFSET;
+            if (c == ENGLISH_SMALL_LETTER_OFFSET) {
+                suffixN /= 28;
+                continue;
+            }
+            if (c == DASH_CODE + ENGLISH_SMALL_LETTER_OFFSET) c = DASH_CHAR;
+            result = (char) c + result;
+            suffixN /= 28;
+        }
+        long c = suffixN + ENGLISH_SMALL_LETTER_OFFSET;
+        if (c == DASH_CODE + ENGLISH_SMALL_LETTER_OFFSET) c = DASH_CHAR;
+        result = (char) c + result;
+        return result;
+    }
+
+    public boolean checkCharacter(char c) {
+        int code = 0 + c;
+        if (code == 45) return true;
+        code -= ENGLISH_SMALL_LETTER_OFFSET;
+        if (code > 0 && code < 27) return true;
+        return false;
+    }
+
+
+    public boolean checkString(String word) {
+        for (int i = 0; i < word.length(); i++) {
+            if (!checkCharacter(word.charAt(i))) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public String cleanString(String s) {
+        return s;
+    }
+
+}

english/src/test/java/org/apache/lucene/morpholgy/english/EnglishLetterDecoderEncoderTest.java

@@ -0,0 +1,40 @@
+/**
+ * Copyright 2009 Alexander Kuznetsov
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.lucene.morpholgy.english;
+
+import static org.hamcrest.core.IsEqual.equalTo;
+import static org.junit.Assert.assertThat;
+import org.junit.Before;
+
+
+public class EnglishLetterDecoderEncoderTest {
+    private EnglishLetterDecoderEncoder decoderEncoder;
+
+    @Before
+    public void setUp() {
+        decoderEncoder = new EnglishLetterDecoderEncoder();
+    }
+
+    @org.junit.Test
+    public void testDecodeEncodeToArray() {
+        assertThat(decoderEncoder.decodeArray(decoderEncoder.encodeToArray("abcdefghijklmnopqrstuvwxyz")), equalTo("abcdefghijklmnopqrstuvwxyz"));
+        assertThat(decoderEncoder.decodeArray(decoderEncoder.encodeToArray("xyz")), equalTo("xyz"));
+        assertThat(decoderEncoder.decodeArray(decoderEncoder.encodeToArray("ytrrty")), equalTo("ytrrty"));
+        assertThat(decoderEncoder.decodeArray(decoderEncoder.encodeToArray("ytrrtyz")), equalTo("ytrrtyz"));
+        assertThat(decoderEncoder.decodeArray(decoderEncoder.encodeToArray("ytrrtyzqwqwe")), equalTo("ytrrtyzqwqwe"));
+
+    }
+}

english/src/test/java/org/apache/lucene/morpholgy/english/RussianLuceneMorphTest.java

@@ -0,0 +1,38 @@
+/**
+ * Copyright 2009 Alexander Kuznetsov
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.lucene.morpholgy.english;
+
+import org.apache.lucene.morphology.LuceneMorph;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.IOException;
+
+public class RussianLuceneMorphTest {
+    private LuceneMorph luceneMorph;
+
+    @Before
+    public void setUp() throws IOException {
+        luceneMorph = new LuceneMorph(this.getClass().getResourceAsStream("/org/apache/lucene/morphology/english/morph.info"), new EnglishLetterDecoderEncoder());
+    }
+
+    @Test
+    public void shoudGetCorrentMorphInfo() throws IOException {
+        System.out.println(luceneMorph.getMorhInfo("purchases"));
+        System.out.println(luceneMorph.getMorhInfo("existing"));
+        System.out.println(luceneMorph.getMorhInfo("was"));
+    }
+}