pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.4.0 / lucene / src / java / org / apache / lucene / index / PrefixCodedTerms.java

diff --git a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/index/PrefixCodedTerms.java b/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/index/PrefixCodedTerms.java
deleted file mode 100644 (file)
index 41caf0c..0000000
--- a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/index/PrefixCodedTerms.java
+++ /dev/null
@@ -1,151 +0,0 @@
-package org.apache.lucene.index;
-
-/**
- * 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.io.IOException;
-import java.util.Iterator;
-
-import org.apache.lucene.index.Term;
-import org.apache.lucene.store.IndexInput;
-import org.apache.lucene.store.RAMFile;
-import org.apache.lucene.store.RAMInputStream;
-import org.apache.lucene.store.RAMOutputStream;
-import org.apache.lucene.util.BytesRef;
-import org.apache.lucene.util.StringHelper;
-
-/**
- * Prefix codes term instances (prefixes are shared)
- * @lucene.experimental
- */
-class PrefixCodedTerms implements Iterable<Term> {
-  final RAMFile buffer;
-  
-  private PrefixCodedTerms(RAMFile buffer) {
-    this.buffer = buffer;
-  }
-  
-  /** @return size in bytes */
-  public long getSizeInBytes() {
-    return buffer.getSizeInBytes();
-  }
-  
-  /** @return iterator over the bytes */
-  public Iterator<Term> iterator() {
-    return new PrefixCodedTermsIterator();
-  }
-  
-  class PrefixCodedTermsIterator implements Iterator<Term> {
-    final IndexInput input;
-    String field = "";
-    BytesRef bytes = new BytesRef();
-    Term term = new Term(field, "");
-
-    PrefixCodedTermsIterator() {
-      try {
-        input = new RAMInputStream(buffer);
-      } catch (IOException e) {
-        throw new RuntimeException(e);
-      }
-    }
-
-    public boolean hasNext() {
-      return input.getFilePointer() < input.length();
-    }
-    
-    public Term next() {
-      assert hasNext();
-      try {
-        int code = input.readVInt();
-        if ((code & 1) != 0) {
-          // new field
-          field = StringHelper.intern(input.readString());
-        }
-        int prefix = code >>> 1;
-        int suffix = input.readVInt();
-        bytes.grow(prefix + suffix);
-        input.readBytes(bytes.bytes, prefix, suffix);
-        bytes.length = prefix + suffix;
-        term.set(field, bytes.utf8ToString());
-        return term;
-      } catch (IOException e) {
-        throw new RuntimeException(e);
-      }
-    }
-    
-    public void remove() {
-      throw new UnsupportedOperationException();
-    }
-  }
-  
-  /** Builds a PrefixCodedTerms: call add repeatedly, then finish. */
-  public static class Builder {
-    private RAMFile buffer = new RAMFile();
-    private RAMOutputStream output = new RAMOutputStream(buffer);
-    private Term lastTerm = new Term("");
-    private BytesRef lastBytes = new BytesRef();
-    private BytesRef scratch = new BytesRef();
-
-    /** add a term */
-    public void add(Term term) {
-      assert lastTerm.equals(new Term("")) || term.compareTo(lastTerm) > 0;
-
-      scratch.copy(term.text);
-      try {
-        int prefix = sharedPrefix(lastBytes, scratch);
-        int suffix = scratch.length - prefix;
-        if (term.field.equals(lastTerm.field)) {
-          output.writeVInt(prefix << 1);
-        } else {
-          output.writeVInt(prefix << 1 | 1);
-          output.writeString(term.field);
-        }
-        output.writeVInt(suffix);
-        output.writeBytes(scratch.bytes, scratch.offset + prefix, suffix);
-        lastBytes.copy(scratch);
-        lastTerm.text = term.text;
-        lastTerm.field = term.field;
-      } catch (IOException e) {
-        throw new RuntimeException(e);
-      }
-    }
-    
-    /** return finalized form */
-    public PrefixCodedTerms finish() {
-      try {
-        output.close();
-        return new PrefixCodedTerms(buffer);
-      } catch (IOException e) {
-        throw new RuntimeException(e);
-      }
-    }
-    
-    private int sharedPrefix(BytesRef term1, BytesRef term2) {
-      int pos1 = 0;
-      int pos1End = pos1 + Math.min(term1.length, term2.length);
-      int pos2 = 0;
-      while(pos1 < pos1End) {
-        if (term1.bytes[term1.offset + pos1] != term2.bytes[term2.offset + pos2]) {
-          return pos1;
-        }
-        pos1++;
-        pos2++;
-      }
-      return pos1;
-    }
-  }
-}