package org.apache.oodt.opendapps;
//JDK imports
import java.util.Arrays;
import java.util.Enumeration;
import java.util.logging.Level;
import java.util.logging.Logger;
//OPeNDAP/THREDDS imports
import opendap.dap.Attribute;
import opendap.dap.AttributeTable;
import opendap.dap.DAS;
import opendap.dap.NoSuchAttributeException;
//OODT imports
import org.apache.oodt.opendapps.config.OpendapConfig;
import org.apache.oodt.profile.EnumeratedProfileElement;
import org.apache.oodt.profile.Profile;
import org.apache.oodt.profile.ProfileElement;
import org.apache.oodt.profile.RangedProfileElement;
import static org.apache.oodt.opendapps.DapNames.*;
/**
*
*
* This class is used to set custom functionality for scraping data into
* different types of objects. The class looks at the {@link OpendapConfig} and
* then tries to stuff what's in each <var> into
* {@link RangedProfileElement} or {@link EnumeratedProfileElement}. The class
* is designed with extensibility in mind in case new {@link ProfileElement}
* types are created in the future.
*
*/
public class OpendapProfileElementExtractor {
private static final Logger LOG = Logger
.getLogger(OpendapProfileElementExtractor.class.getName());
private OpendapConfig conf;
public OpendapProfileElementExtractor(OpendapConfig conf) {
this.conf = conf;
}
public RangedProfileElement extractRangedProfileElement(String elemName, String varname,
Profile profile, DAS das) throws NoSuchAttributeException {
RangedProfileElement elem = new RangedProfileElement(profile);
elem.setName(elemName);
AttributeTable attTable = null;
try {
attTable = das.getAttributeTable(varname);
// make variable names case insensitive
if(attTable == null) attTable = das.getAttributeTable(varname.toLowerCase());
if(attTable == null) attTable = das.getAttributeTable(varname.toUpperCase());
if(attTable == null) throw new NoSuchAttributeException("Att table for ["+varname+"] is null!");
} catch (NoSuchAttributeException e) {
e.printStackTrace();
LOG.log(Level.WARNING, "Error extracting attribute table for element: ["
+ elemName + "]: Message: " + e.getMessage());
throw e;
}
Enumeration attributeNames = attTable.getNames();
while (attributeNames.hasMoreElements()) {
String attrName = (String) attributeNames.nextElement();
Attribute attr = attTable.getAttribute(attrName);
Enumeration attrValues = null;
try {
attrValues = attr.getValues();
} catch (NoSuchAttributeException e) {
e.printStackTrace();
LOG.log(Level.WARNING, "Attempt to resolve attribute: [" + attrName
+ "] failed: Message: " + e.getMessage());
continue;
}
while (attrValues.hasMoreElements()) {
String attrValue = (String) attrValues.nextElement();
if (attrName.equals(ACTUAL_RANGE)) {
elem.setMinValue(attrValue);
if (attrValues.hasMoreElements()) {
elem.setMaxValue((String) attrValues.nextElement());
}
} else if (attrName.equals(UNITS)) {
elem.setUnit(attrValue);
} else if (attrName.equals(START)) {
elem.setMinValue(attrValue);
} else if (attrName.equals(END)) {
elem.setMaxValue(attrValue);
}
}
}
return elem;
}
public EnumeratedProfileElement extractEnumeratedProfileElement(String elemName, String varname,
Profile profile, DAS das)
throws NoSuchAttributeException {
EnumeratedProfileElement elem = new EnumeratedProfileElement(profile);
elem.setName(elemName);
AttributeTable attTable = null;
try {
attTable = das.getAttributeTable(elemName);
} catch (NoSuchAttributeException e) {
LOG.log(Level.WARNING, "Error extracting attribute table for element: ["
+ elemName + "]: Message: " + e.getMessage());
throw e;
}
Enumeration attributeNames = attTable.getNames();
while (attributeNames.hasMoreElements()) {
String attrName = (String) attributeNames.nextElement();
Attribute attr = attTable.getAttribute(attrName);
Enumeration attrValues = null;
try {
attrValues = attr.getValues();
} catch (NoSuchAttributeException e) {
LOG.log(Level.WARNING, "Attempt to resolve attribute: [" + attrName
+ "] failed: Message: " + e.getMessage());
continue;
}
while (attrValues.hasMoreElements()) {
String attrValue = (String) attrValues.nextElement();
if (attrName.equals(ACTUAL_RANGE)) {
String[] vals = attrValue.split(" ");
elem.getValues().addAll(Arrays.asList(vals));
} else if (attrName.equals(UNITS)) {
elem.setUnit(attrValue);
} else {
elem.getValues().add(attrValue);
}
}
}
return elem;
}
}