java/dictionary-generator/src/cz/frantovo/telco/dictionary/IndexEntry.java
author František Kučera <franta-hg@frantovo.cz>
Mon, 22 Jun 2020 23:11:14 +0200
changeset 152 5c878a53d3ed
parent 151 a9f1ba451247
permissions -rw-r--r--
add dictionary and concept IDs + some documentation
     1 /**
     2  * Free Telco Dictionary
     3  * Copyright © 2013 František Kučera (frantovo.cz)
     4  *
     5  * This program is free software: you can redistribute it and/or modify
     6  * it under the terms of the GNU General Public License as published by
     7  * the Free Software Foundation, version 3 of the License.
     8  *
     9  * This program is distributed in the hope that it will be useful,
    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  * GNU General Public License for more details.
    13  *
    14  * You should have received a copy of the GNU General Public License
    15  * along with this program. If not, see <http://www.gnu.org/licenses/>.
    16  */
    17 package cz.frantovo.telco.dictionary;
    18 
    19 import java.io.DataOutputStream;
    20 import java.io.IOException;
    21 import java.nio.charset.StandardCharsets;
    22 import java.util.Objects;
    23 
    24 /**
    25  * Represents one item in StarDict index file (.idx)
    26  * which links the term and its position and length in data file (.dict)
    27  * 
    28  * @author Ing. František Kučera (frantovo.cz)
    29  */
    30 public class IndexEntry implements Comparable<IndexEntry> {
    31 
    32 	private String name;
    33 	private long offset;
    34 	private long length;
    35 	private long ordinal;
    36 
    37 	public IndexEntry(String name, long offset, long length) {
    38 		this.name = name;
    39 		this.offset = offset;
    40 		this.length = length;
    41 	}
    42 
    43 	public void serialize(DataOutputStream indexOutputStream) throws IOException {
    44 		indexOutputStream.write(name.getBytes(StandardCharsets.UTF_8));
    45 		indexOutputStream.write(0);
    46 		indexOutputStream.writeInt((int) offset); // unsigned int 32
    47 		indexOutputStream.writeInt((int) length); // unsigned int 32
    48 	}
    49 
    50 	public void setOrdinal(long ordinal) {
    51 		this.ordinal = ordinal;
    52 	}
    53 
    54 	public long getOrdinal() {
    55 		return ordinal;
    56 	}
    57 
    58 	@Override
    59 	public int compareTo(IndexEntry o) {
    60 		int nameDiff = name.compareTo(o.name);
    61 		if (nameDiff == 0) {
    62 			int offsetDiff = ((Long) offset).compareTo(o.offset);
    63 			if (offsetDiff == 0) {
    64 				return ((Long) length).compareTo(o.length);
    65 			} else {
    66 				return offsetDiff;
    67 			}
    68 		} else {
    69 			return nameDiff;
    70 		}
    71 	}
    72 
    73 	@Override
    74 	public boolean equals(Object o) {
    75 		return o instanceof IndexEntry && compareTo((IndexEntry) o) == 0;
    76 	}
    77 
    78 	@Override
    79 	public int hashCode() {
    80 		int hash = 5;
    81 		hash = 53 * hash + Objects.hashCode(this.name);
    82 		hash = 53 * hash + (int) (this.offset ^ (this.offset >>> 32));
    83 		hash = 53 * hash + (int) (this.length ^ (this.length >>> 32));
    84 		return hash;
    85 	}
    86 }