gcc/libjava/javax/print/attribute/SetOfIntegerSyntax.java

/* SetOfIntegerSyntax.java -- 
   Copyright (C) 2003 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

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along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
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independent module, the terms and conditions of the license of that
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this exception to your version of the library, but you are not
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exception statement from your version. */

package javax.print.attribute;

import java.io.Serializable;
import java.util.Vector;

/**
 * @author Michael Koch
 */
public abstract class SetOfIntegerSyntax
  implements Cloneable, Serializable
{
  private static final long serialVersionUID = 3666874174847632203L;

  private int[][] members;

  private static int[][] normalize(Vector vecMembers)
  {
    // XXX: Perhaps we should merge ranges that overlap.
    
    int current = 0;
    int[][] members = new int[vecMembers.size()][];

    while (vecMembers.size() > 0)
      {
        // Search the lowest range.
        int[] range = (int[]) vecMembers.elementAt(0);

        for (int index = 1; index < vecMembers.size(); index++)
          {
            int[] tmp = (int[]) vecMembers.elementAt(index);

            if (range[0] > tmp[0]
                || (range[0] == tmp[0]
                    && range[0] > tmp[0]))
              range = tmp;
          }

        members[current] = range;
        current++;
      }
    
    return members;
  }
  
  /**
   * Creates a <code>SetOfIntegerSyntax</code> object.
   *
   * @param member the member value
   *
   * @exception IllegalArgumentException if member is < 0
   */
  protected SetOfIntegerSyntax(int member)
  {
    if (member < 0)
      throw new IllegalArgumentException("member may not be less than 0");

    this.members = new int[][]{{member, member}};
  }

  /**
   * Creates a <code>SetOfIntegerSyntax</code> object.
   *
   * @param members the members to use in this set
   *
   * @exception IllegalArgumentException if any element is invalid
   * @exception NullPointerException if any element of members is null
   */
  protected SetOfIntegerSyntax(int[][] members)
  {
    Vector vecMembers = new Vector();
    
    if (members != null)
      {
        for (int index = 0; index < members.length; index++)
          {
            int lower;
            int upper;

            if (members[index].length == 1)
              {
                lower = members[index][0];
                upper = members[index][0];
              }
            else if (members[index].length == 2)
              {
                lower = members[index][0];
                upper = members[index][1];
              }
            else
              throw new IllegalArgumentException("invalid member element");

            if (lower <= upper && lower < 0)
              throw new IllegalArgumentException("invalid member element");

            if (lower <= upper)
              {
                int[] range = new int[2];
                range[0] = lower;
                range[1] = upper;
                vecMembers.add(range);
              }
          }
      }
    
    this.members = normalize(vecMembers);
  }

  /**
   * Creates a <code>SetOfIntegerSyntax</code> object.
   *
   * @param lowerBound the lower bound value
   * @param upperBound the upper bound value
   *
   * @exception IllegalArgumentException if lowerBound <= uppbound
   * and lowerBound < 0
   */
  protected SetOfIntegerSyntax(int lowerBound, int upperBound)
  {
    if (lowerBound <= upperBound
        && lowerBound < 0)
      throw new IllegalArgumentException();

    members = (lowerBound <= upperBound ? new int[][]{{lowerBound, upperBound}}
                                        : new int[0][]);
  }

  /**
   * Checks if this set contains value.
   *
   * @param value the value to test for
   *
   * @return true if this set contains value, false otherwise
   */
  public boolean contains(int value)
  {
    // This only works on a normalized member array.
    for (int index = 0; index < members.length; index++)
      {
        if (value < members[index][0])
          return false;
        else if (value < members[index][1])
          return true;
      }

    return false;
  }

  /**
   * Checks if this set contains value.
   *
   * @param value the value to test for
   *
   * @return true if this set contains value, false otherwise
   */
  public boolean contains(IntegerSyntax value)
  {
    return contains(value.getValue());
  }

  /**
   * Tests of obj is equal to this object.
   *
   * @param obj the object to test
   *
   * @returns true if both objects are equal, false otherwise.
   */
  public boolean equals(Object obj)
  {
    if (! (obj instanceof SetOfIntegerSyntax))
      return false;

    throw new Error("not implemented");
  }

  /**
   * Returns an array describing the members included in this set.
   *
   * @return the array with the members
   */
  public int[][] getMembers()
  {
    throw new Error("not implemented");
  }

  /**
   * Returns the hashcode for this object.
   *
   * @return the hashcode
   */
  public int hashCode()
  {
    throw new Error("not implemented");
  }

  /**
   * Returns the smallest value that is greater then x.
   *
   * @param x an integer value
   *
   * @return the next value
   */
  public int next(int x)
  {
    throw new Error("not implemented");
  }

  /**
   * Returns the string representation for this object.
   *
   * @return the string representation
   */
  public String toString()
  {
    throw new Error("not implemented");
  }
}