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fixed NPE

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git-svn-id: https://public-transport-enabler.googlecode.com/svn/trunk@812 0924bc21-9374-b0fa-ee44-9ff1593b38f0
This commit is contained in:
andreas.schildbach@gmail.com 2011-10-06 15:10:24 +00:00
parent 4eebf50007
commit 7db1140624
1 changed files with 19 additions and 3 deletions
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22
src/de/schildbach/pte/dto/Line.java
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@ -77,13 +77,13 @@ public final class Line implements Serializable, Comparable<Line>
if (!(o instanceof Line))
return false;
final Line other = (Line) o;
return (this.label.equals(other.label));
return nullSafeEquals(this.label, other.label);
}
@Override
public int hashCode()
{
return label.hashCode();
return nullSafeHashCode(label);
}
public int compareTo(final Line other)
@ -96,6 +96,22 @@ public final class Line implements Serializable, Comparable<Line>
if (compareProduct != 0)
return compareProduct;
return label.compareTo(other.label);
return this.label.compareTo(other.label);
}
private boolean nullSafeEquals(final Object o1, final Object o2)
{
if (o1 == null && o2 == null)
return true;
if (o1 != null && o1.equals(o2))
return true;
return false;
}
private int nullSafeHashCode(final Object o)
{
if (o == null)
return 0;
return o.hashCode();
}
}