Impressum Difference.java Sprache: JAVA

/*
* 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.
*/

package org.netbeans.api.diff;

import java.io.Serializable;

/**
* This class represents a single difference between two files.
*
* @author  Martin Entlicher
*/
public class Difference extends Object implements Serializable {

    /** Delete type of difference - a portion of a file was removed in the other */
    public static final int DELETE = 0;

    /** Add type of difference - a portion of a file was added in the other */
    public static final int ADD = 1;

    /** Change type of difference - a portion of a file was changed in the other */
    public static final int CHANGE = 2;

    private int type = 0;
    private int firstStart = 0;
    private int firstEnd = 0;
    private int secondStart = 0;
    private int secondEnd = 0;
    private Difference.Part[] firstLineDiffs;
    private Difference.Part[] secondLineDiffs;

    /** The text of the difference in the first file. */
    private String firstText;
    /** The text of the difference in the second file. */
    private String secondText;

    private static final long serialVersionUID = 7638201981188907148L;

    /**
     * Creates a new instance of Difference
     * @param type The type of the difference. Must be one of the {@link #DELETE DELETE},
     *             {@link #ADD ADD} or {@link #CHANGE CHANGE}
     * @param firstStart The line number on which the difference starts in the first file.
     * @param firstEnd The line number on which the difference ends in the first file.
     * @param secondStart The line number on which the difference starts in the second file.
     * @param secondEnd The line number on which the difference ends in the second file.
     */
    public Difference(int type, int firstStart, int firstEnd, int secondStart, int secondEnd) {
        this(type, firstStart, firstEnd, secondStart, secondEnd, null, null, null, null);
    }

    /**
     * Creates a new instance of Difference
     * @param type The type of the difference. Must be one of the {@link #DELETE DELETE},
     *             {@link #ADD ADD} or {@link #CHANGE CHANGE}
     * @param firstStart The line number on which the difference starts in the first file.
     * @param firstEnd The line number on which the difference ends in the first file.
     * @param secondStart The line number on which the difference starts in the second file.
     * @param secondEnd The line number on which the difference ends in the second file.
     * @param firstText The text content of the difference in the first file.
     * @param secondText The text content of the difference in the second file.
     */
    public Difference(int type, int firstStart, int firstEnd, int secondStart, int secondEnd,
                      String firstText, String secondText) {
        this(type, firstStart, firstEnd, secondStart, secondEnd, firstText, secondText, null, null);
    }

    /**
     * Creates a new instance of Difference
     * @param type The type of the difference. Must be one of the {@link #DELETE DELETE},
     *             {@link #ADD ADD} or {@link #CHANGE CHANGE}
     * @param firstStart The line number on which the difference starts in the first file.
     * @param firstEnd The line number on which the difference ends in the first file.
     * @param secondStart The line number on which the difference starts in the second file.
     * @param secondEnd The line number on which the difference ends in the second file.
     * @param firstText The text content of the difference in the first file.
     * @param secondText The text content of the difference in the second file.
     * @param firstLineDiffs The list of differences on lines in the first file.
     *                    The list contains instances of {@link Difference.Part}.
     *                    Can be <code>null</code> when there are no line differences.
     * @param secondLineDiffs The list of differences on lines in the second file.
     *                    The list contains instances of {@link Difference.Part}.
     *                    Can be <code>null</code> when there are no line differences.
     */
    public Difference(int type, int firstStart, int firstEnd, int secondStart, int secondEnd,
                      String firstText, String secondText, Difference.Part[] firstLineDiffs, Difference.Part[] secondLineDiffs) {
        if (type > 2 || type < 0) {
            throw new IllegalArgumentException("Bad Difference type = "+type);
        }
        this.type = type;
        this.firstStart = firstStart;
        this.firstEnd = firstEnd;
        this.secondStart = secondStart;
        this.secondEnd = secondEnd;
        this.firstText = firstText;
        this.secondText = secondText;
        this.firstLineDiffs = firstLineDiffs;
        this.secondLineDiffs = secondLineDiffs;
    }

    /**
     * Get the difference type. It's one of {@link #DELETE DELETE},
     * {@link #ADD ADD} or {@link #CHANGE CHANGE} meaning
     * respective change in second source.
     */
    public int getType() {
        return this.type;
    }

    /**
     * Get the line number on which the difference starts in the first file.
     *
     * <p>For ADD changes it returns previous line number e.g. 0 for add
     * file start.
     */
    public int getFirstStart() {
        return this.firstStart;
    }

    /**
     * Get the line number on which the difference ends in the first file.
     * <p>
     * Does not have any meaning for ADD changes.
     */
    public int getFirstEnd() {
        return this.firstEnd;
    }

    /**
     * Get the line number on which the difference starts in the second file.
     */
    public int getSecondStart() {
        return this.secondStart;
    }

    /**
     * Get the line number on which the difference ends in the second file.
     * <p>
     * Does not have any meaning for DELETE changes.
     */
    public int getSecondEnd() {
        return this.secondEnd;
    }

    /**
     * The list of differences on lines in the first file.
     * The list contains instances of {@link Difference.Part}.
     * Can be <code>null</code> when there are no line differences.
     */
    public Difference.Part[] getFirstLineDiffs() {
        return firstLineDiffs;
    }

    /**
     * The list of differences on lines in the second file.
     * The list contains instances of {@link Difference.Part}.
     * Can be <code>null</code> when there are no line differences.
     */
    public Difference.Part[] getSecondLineDiffs() {
        return secondLineDiffs;
    }

    /**
     * Get the text content of the difference in the first file.
     */
    public String getFirstText() {
        return firstText;
    }

    /**
     * Get the text content of the difference in the second file.
     */
    public String getSecondText() {
        return secondText;
    }

    public String toString() {
        return "Difference("+((type == ADD) ? "ADD" : (type == DELETE) ? "DELETE" : "CHANGE")+", "+
               firstStart+", "+firstEnd+", "+secondStart+", "+secondEnd+")";
    }

    /**
     * This class represents a difference on a single line.
     */
    public static final class Part extends Object implements Serializable {

        private int type;
        private int line;
        private int pos1;
        private int pos2;
        private String text;

        private static final long serialVersionUID = 7638201981188907149L;

        /**
          * Creates a new instance of LineDiff
          * @param type The type of the difference. Must be one of the {@link #DELETE DELETE},
          *             {@link #ADD ADD} or {@link #CHANGE CHANGE}
          * @param line The line number
          * @param pos1 The position on which the difference starts on this line.
          * @param pos2 The position on which the difference ends on this line.
          */
        public Part(int type, int line, int pos1, int pos2) {
            if (type > 2 || type < 0) {
                throw new IllegalArgumentException("Bad Difference type = "+type);
            }
            this.type = type;
            this.line = line;
            this.pos1 = pos1;
            this.pos2 = pos2;
        }

        /**
          * Get the difference type. It's one of {@link #DELETE DELETE},
          * {@link #ADD ADD} or {@link #CHANGE CHANGE}.
          */
        public int getType() {
            return this.type;
        }

        /**
          * Get the line number.
          */
        public int getLine() {
            return this.line;
        }

        /**
          * Get the position on which the difference starts on this line.
          */
        public int getStartPosition() {
            return this.pos1;
        }

        /**
          * Get the position on which the difference ends on this line.
          */
        public int getEndPosition() {
            return this.pos2;
        }

        /**
         * Set the text content of the difference.
         *
        public void setText(String text) {
            this.text = text;
        }

        /**
         * Get the text content of the difference.
         *
        public String getText() {
            return text;
        }
         */

    }

}

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