| package org.apache.lucene.index; |
| |
| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2001 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" and |
| * "Apache Lucene" must not be used to endorse or promote products |
| * derived from this software without prior written permission. For |
| * written permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * "Apache Lucene", nor may "Apache" appear in their name, without |
| * prior written permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| import java.util.Hashtable; |
| import java.util.Vector; |
| import java.util.Enumeration; |
| import java.io.IOException; |
| |
| import org.apache.lucene.document.Document; |
| import org.apache.lucene.document.Field; |
| |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.store.OutputStream; |
| import org.apache.lucene.store.InputStream; |
| |
| final class FieldInfos { |
| private Vector byNumber = new Vector(); |
| private Hashtable byName = new Hashtable(); |
| |
| FieldInfos() { |
| add("", false); |
| } |
| |
| FieldInfos(Directory d, String name) throws IOException { |
| InputStream input = d.openFile(name); |
| try { |
| read(input); |
| } finally { |
| input.close(); |
| } |
| } |
| |
| /** Adds field info for a Document. */ |
| final void add(Document doc) { |
| Enumeration fields = doc.fields(); |
| while (fields.hasMoreElements()) { |
| Field field = (Field)fields.nextElement(); |
| add(field.name(), field.isIndexed()); |
| } |
| } |
| |
| /** Merges in information from another FieldInfos. */ |
| final void add(FieldInfos other) { |
| for (int i = 0; i < other.size(); i++) { |
| FieldInfo fi = other.fieldInfo(i); |
| add(fi.name, fi.isIndexed); |
| } |
| } |
| |
| private final void add(String name, boolean isIndexed) { |
| FieldInfo fi = fieldInfo(name); |
| if (fi == null) |
| addInternal(name, isIndexed); |
| else if (fi.isIndexed != isIndexed) |
| throw new IllegalStateException("field " + name + |
| (fi.isIndexed ? " must" : " cannot") + |
| " be an indexed field."); |
| } |
| |
| private final void addInternal(String name, boolean isIndexed) { |
| FieldInfo fi = new FieldInfo(name, isIndexed, byNumber.size()); |
| byNumber.addElement(fi); |
| byName.put(name, fi); |
| } |
| |
| final int fieldNumber(String fieldName) { |
| FieldInfo fi = fieldInfo(fieldName); |
| if (fi != null) |
| return fi.number; |
| else |
| return -1; |
| } |
| |
| final FieldInfo fieldInfo(String fieldName) { |
| return (FieldInfo)byName.get(fieldName); |
| } |
| |
| final String fieldName(int fieldNumber) { |
| return fieldInfo(fieldNumber).name; |
| } |
| |
| final FieldInfo fieldInfo(int fieldNumber) { |
| return (FieldInfo)byNumber.elementAt(fieldNumber); |
| } |
| |
| final int size() { |
| return byNumber.size(); |
| } |
| |
| final void write(Directory d, String name) throws IOException { |
| OutputStream output = d.createFile(name); |
| try { |
| write(output); |
| } finally { |
| output.close(); |
| } |
| } |
| |
| final void write(OutputStream output) throws IOException { |
| output.writeVInt(size()); |
| for (int i = 0; i < size(); i++) { |
| FieldInfo fi = fieldInfo(i); |
| output.writeString(fi.name); |
| output.writeByte((byte)(fi.isIndexed ? 1 : 0)); |
| } |
| } |
| |
| private final void read(InputStream input) throws IOException { |
| int size = input.readVInt(); |
| for (int i = 0; i < size; i++) |
| addInternal(input.readString().intern(), |
| input.readByte() != 0); |
| } |
| } |