Histogram Op and RGB images
---------------------------
Key: GEOT-2780
URL: http://jira.codehaus.org/browse/GEOT-2780
Project: GeoTools
Issue Type: Bug
Components: core coverage
Reporter: Michael Bedward
Assignee: Michael Bedward
Fix For: 2.6.0
Reported by Gabriel...
I've been trying to use the
org.geotools.coverage.processing.operation.Histogram operation against
the sample geoserver coverages and the only one it works for the DEM.
Problem being an NPE thrown at
java.lang.ClassCastException: [Ljava.lang.Object;
at
org.geotools.coverage.processing.OperationJAI.deriveSampleDimension(OperationJAI.java:781)
at
org.geotools.coverage.processing.OperationJAI.deriveGridCoverage(OperationJAI.java:580)
..
This is due to the coverage not defining any geophysics category and
OperationJAI checking for null category list but not for an empty one.
The following patch seems to solve the problem. Do you think it's
alright? I might be missing something fundamental, as I only tried what
seemed obvious.
Index: src/main/java/org/geotools/coverage/processing/OperationJAI.java
===================================================================
--- src/main/java/org/geotools/coverage/processing/OperationJAI.java
(revision 34115)
+++ src/main/java/org/geotools/coverage/processing/OperationJAI.java
(working copy)
@@ -774,7 +774,7 @@
sampleDim = allBands[allBands.length == 1 ? 0 : numBands];
final List<Category> categories =
sampleDim.getCategories();
// GridSampleDimension may contain no categories
- if (categories == null) {
+ if (categories == null || categories.size() == 0) {
result[numBands] = sampleDim;
continue;
}
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