com.google.gwt.view.client.Range.java Source code

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Here is the source code for com.google.gwt.view.client.Range.java

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/*
 * Copyright 2010 Google Inc.
 *
 * Licensed 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.
 */
package com.google.gwt.view.client;

import java.io.Serializable;

/**
 * The range of interest for a single handler.
 */
public class Range implements Serializable {

    private int length;
    private int start;

    /**
     * Construct a new {@link Range}.
     *
     * @param start the start index
     * @param length the length
     */
    public Range(int start, int length) {
        this.start = start;
        this.length = length;
    }

    /**
     * Used by RPC.
     */
    Range() {
    }

    /**
     * Return true if this ranges's start end length are equal to those of
     * the given object.
     */
    @Override
    public boolean equals(Object o) {
        if (!(o instanceof Range)) {
            return false;
        }
        Range r = (Range) o;
        return start == r.getStart() && length == r.getLength();
    }

    /**
     * Get the length of the range.
     *
     * @return the length
     */
    public int getLength() {
        return length;
    }

    /**
     * Get the start index of the range.
     *
     * @return the start index
     */
    public int getStart() {
        return start;
    }

    /**
     * Return a hash code based on this range's start and length.
     */
    @Override
    public int hashCode() {
        return (length * 31) ^ start;
    }

    /**
     * Returns a String representation for debugging.
     */
    @Override
    public String toString() {
        return "Range(" + start + "," + length + ")";
    }
}