/*
* Geotoolkit - An Open Source Java GIS Toolkit
* http://www.geotoolkit.org
*
* (C) 2010, Geomatys
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library 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
* Lesser General Public License for more details.
*/
package org.geotoolkit.processing.coverage.metadataextractor;
import java.io.File;
import java.net.URL;
import java.util.logging.Level;
import org.geotoolkit.storage.coverage.CoverageReference;
import org.geotoolkit.coverage.io.CoverageStoreException;
import org.geotoolkit.coverage.io.GridCoverageReader;
import org.geotoolkit.coverage.io.ImageCoverageReader;
import org.geotoolkit.parameter.Parameters;
import org.geotoolkit.processing.AbstractProcess;
import org.geotoolkit.process.ProcessException;
import org.opengis.parameter.ParameterValueGroup;
import org.apache.sis.storage.DataStoreException;
import org.apache.sis.util.ArgumentChecks;
import org.opengis.coverage.Coverage;
import org.opengis.metadata.Metadata;
import org.apache.sis.util.logging.Logging;
import org.geotoolkit.utility.parameter.ParametersExt;
/**
*
* @author Alexis Manin(Geomatys)
*/
public class ExtractionProcess extends AbstractProcess {
ExtractionProcess(final ParameterValueGroup input) {
super(ExtractionDescriptor.INSTANCE, input);
}
/**
*
* @param source source to extract metadata from.
*
*/
public ExtractionProcess(Object source){
super(ExtractionDescriptor.INSTANCE, asParameters(source));
}
private static ParameterValueGroup asParameters(Object source){
final ParameterValueGroup params = ExtractionDescriptor.INPUT_DESC.createValue();
ParametersExt.getOrCreateValue(params, ExtractionDescriptor.IN_SOURCE.getName().getCode()).setValue(source);
return params;
}
/**
* Execute process now.
*
* @return metadata
* @throws ProcessException
*/
public Metadata executeNow() throws ProcessException {
execute();
return (Metadata) outputParameters.parameter(ExtractionDescriptor.OUT_METADATA.getName().getCode()).getValue();
}
@Override
protected void execute() throws ProcessException {
ArgumentChecks.ensureNonNull("inputParameter", inputParameters);
Object input = Parameters.getOrCreate(ExtractionDescriptor.IN_SOURCE, inputParameters).getValue();
Object reader = null;
Metadata output = null;
//Check if we get a file, or a reference to file.
if (input instanceof String || input instanceof URL || input instanceof File) {
reader = new ImageCoverageReader();
try {
((ImageCoverageReader)reader).setInput(input);
} catch (CoverageStoreException ex) {
Logging.getLogger("org.geotoolkit.processing.coverage.metadataextractor").log(Level.SEVERE, null, ex);
}
}
//Coverage case is not supported yet
if (input instanceof Coverage) {
//TODO : add a convenience method into coverage interface to get metadata
} else if (input instanceof CoverageReference) {
try {
reader = ((CoverageReference)input).acquireReader();
} catch (DataStoreException ex) {
Logging.getLogger("org.geotoolkit.processing.coverage.metadataextractor").log(Level.SEVERE, null, ex);
}
//Case if we directly get a reader
} else if (input instanceof GridCoverageReader || input instanceof ImageCoverageReader) {
reader = input;
}
if (reader == null){
throw new ProcessException("Input object is not supported for this operation", this, null);
}
//Try to find metadata
if (reader instanceof GridCoverageReader){
try {
output = ((GridCoverageReader)reader).getMetadata();
} catch (CoverageStoreException ex) {
Logging.getLogger("org.geotoolkit.processing.coverage.metadataextractor").log(Level.SEVERE, null, ex);
}
}
if (reader instanceof ImageCoverageReader){
try {
output = ((ImageCoverageReader)reader).getMetadata();
} catch (CoverageStoreException ex) {
Logging.getLogger("org.geotoolkit.processing.coverage.metadataextractor").log(Level.SEVERE, null, ex);
}
}
Parameters.getOrCreate(ExtractionDescriptor.OUT_METADATA, outputParameters).setValue(output);
}
}