pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / icu / src / tools / java / org / apache / lucene / analysis / icu / GenerateJFlexSupplementaryMacros.java

diff --git a/lucene-java-3.5.0/lucene/contrib/icu/src/tools/java/org/apache/lucene/analysis/icu/GenerateJFlexSupplementaryMacros.java b/lucene-java-3.5.0/lucene/contrib/icu/src/tools/java/org/apache/lucene/analysis/icu/GenerateJFlexSupplementaryMacros.java
new file mode 100644 (file)
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+++ b/lucene-java-3.5.0/lucene/contrib/icu/src/tools/java/org/apache/lucene/analysis/icu/GenerateJFlexSupplementaryMacros.java
@@ -0,0 +1,114 @@
+package org.apache.lucene.analysis.icu;
+
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+import java.text.DateFormat;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.TimeZone;
+
+import com.ibm.icu.text.UnicodeSet;
+import com.ibm.icu.text.UnicodeSetIterator;
+import com.ibm.icu.util.VersionInfo;
+
+/** creates a macro to augment jflex's unicode wordbreak support for > BMP */
+public class GenerateJFlexSupplementaryMacros {
+  private static final UnicodeSet BMP = new UnicodeSet("[\u0000-\uFFFF]");
+  private static final String NL = System.getProperty("line.separator");
+  private static final DateFormat DATE_FORMAT = DateFormat.getDateTimeInstance
+    (DateFormat.FULL, DateFormat.FULL, Locale.US);
+  static {
+    DATE_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC"));
+  }
+  
+  private static final String APACHE_LICENSE 
+    = "/*" + NL
+      + " * Copyright 2010 The Apache Software Foundation." + NL
+      + " *" + NL
+      + " * Licensed under the Apache License, Version 2.0 (the \"License\");" + NL
+      + " * you may not use this file except in compliance with the License." + NL
+      + " * You may obtain a copy of the License at" + NL
+      + " *" + NL
+      + " *      http://www.apache.org/licenses/LICENSE-2.0" + NL
+      + " *" + NL
+      + " * Unless required by applicable law or agreed to in writing, software" + NL
+      + " * distributed under the License is distributed on an \"AS IS\" BASIS," + NL
+      + " * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied." + NL
+      + " * See the License for the specific language governing permissions and" + NL
+      + " * limitations under the License." + NL
+      + " */" + NL + NL;
+    
+  
+  public static void main(String args[]) throws Exception {
+    outputHeader();
+    outputMacro("ALetterSupp",         "[:WordBreak=ALetter:]");
+    outputMacro("FormatSupp",          "[:WordBreak=Format:]");
+    outputMacro("ExtendSupp",          "[:WordBreak=Extend:]");
+    outputMacro("NumericSupp",         "[:WordBreak=Numeric:]");
+    outputMacro("KatakanaSupp",        "[:WordBreak=Katakana:]");
+    outputMacro("MidLetterSupp",       "[:WordBreak=MidLetter:]");
+    outputMacro("MidNumSupp",          "[:WordBreak=MidNum:]");
+    outputMacro("MidNumLetSupp",       "[:WordBreak=MidNumLet:]");
+    outputMacro("ExtendNumLetSupp",    "[:WordBreak=ExtendNumLet:]");
+    outputMacro("ExtendNumLetSupp",    "[:WordBreak=ExtendNumLet:]");
+    outputMacro("ComplexContextSupp",  "[:LineBreak=Complex_Context:]");
+    outputMacro("HanSupp",             "[:Script=Han:]");
+    outputMacro("HiraganaSupp",        "[:Script=Hiragana:]");
+  }
+  
+  static void outputHeader() {
+    System.out.print(APACHE_LICENSE);
+    System.out.print("// Generated using ICU4J " + VersionInfo.ICU_VERSION.toString() + " on ");
+    System.out.println(DATE_FORMAT.format(new Date()));
+    System.out.println("// by " + GenerateJFlexSupplementaryMacros.class.getName());
+    System.out.print(NL + NL);
+  }
+  
+  // we have to carefully output the possibilities as compact utf-16
+  // range expressions, or jflex will OOM!
+  static void outputMacro(String name, String pattern) {
+    UnicodeSet set = new UnicodeSet(pattern);
+    set.removeAll(BMP);
+    System.out.println(name + " = (");
+    // if the set is empty, we have to do this or jflex will barf
+    if (set.isEmpty()) {
+      System.out.println("\t  []");
+    }
+    
+    HashMap<Character,UnicodeSet> utf16ByLead = new HashMap<Character,UnicodeSet>();
+    for (UnicodeSetIterator it = new UnicodeSetIterator(set); it.next();) {    
+      char utf16[] = Character.toChars(it.codepoint);
+      UnicodeSet trails = utf16ByLead.get(utf16[0]);
+      if (trails == null) {
+        trails = new UnicodeSet();
+        utf16ByLead.put(utf16[0], trails);
+      }
+      trails.add(utf16[1]);
+    }
+    
+    boolean isFirst = true;
+    for (Character c : utf16ByLead.keySet()) {
+      UnicodeSet trail = utf16ByLead.get(c);
+      System.out.print( isFirst ? "\t  " : "\t| ");
+      isFirst = false;
+      System.out.println("([\\u" + Integer.toHexString(c) + "]" + trail.getRegexEquivalent() + ")");
+    }
+    System.out.println(")");
+  }
+}