001    /*
002     * Created on Feb 13, 2009
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
005     * in compliance with the License. You may obtain a copy of the License at
006     *
007     * http://www.apache.org/licenses/LICENSE-2.0
008     *
009     * Unless required by applicable law or agreed to in writing, software distributed under the License
010     * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
011     * or implied. See the License for the specific language governing permissions and limitations under
012     * the License.
013     *
014     * Copyright @2009-2010 the original author or authors.
015     */
016    package org.fest.swing.data;
017    
018    import static java.lang.String.valueOf;
019    import static org.fest.util.Objects.HASH_CODE_PRIME;
020    import static org.fest.util.Strings.concat;
021    
022    /**
023     * Understands an index.
024     *
025     * @author Alex Ruiz
026     */
027    public final class Index {
028    
029      /**
030       * Creates a new <code>{@link Index}</code>.
031       * @param value the value of the index to create.
032       * @return the created index.
033       */
034      public static Index atIndex(int value) {
035        return new Index(value);
036      }
037    
038      /** The value of this index. */
039      public final int value;
040    
041      private Index(int value) {
042        this.value = value;
043      }
044    
045      @Override public boolean equals(Object obj) {
046        if (this == obj) return true;
047        if (obj == null) return false;
048        if (!(obj instanceof Index)) return false;
049        Index other = (Index)obj;
050        return value == other.value;
051      }
052    
053      @Override public int hashCode() {
054        int result = 1;
055        result = HASH_CODE_PRIME * result + value;
056        return result;
057      }
058    
059      @Override public String toString() {
060        return concat(getClass().getName(), "[value=", valueOf(value), "]");
061      }
062    }