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package org.eclipse.equinox.internal.p2.ql;
import java.util.*;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.equinox.p2.metadata.IInstallableUnit;
import org.eclipse.equinox.p2.ql.IQueryContext;
import org.eclipse.equinox.p2.ql.ITranslationSupport;
import org.eclipse.equinox.p2.query.*;
import org.eclipse.osgi.service.localization.LocaleProvider;
public class QueryContext<T> implements IQueryContext<T> {
private final IQueryable<T> queryable;
private Map<Locale, TranslationSupport> translationSupports;
public QueryContext(IQueryable<T> queryable) {
this.queryable = queryable;
}
public QueryContext(Iterator<T> iterator) {
final IRepeatableIterator<T> repeatable = RepeatableIterator.create(iterator);
this.queryable = new IQueryable<T>() {
public IQueryResult<T> query(IQuery<T> query, IProgressMonitor monitor) {
return query.perform(repeatable.getCopy());
}
};
}
public synchronized ITranslationSupport getTranslationSupport(final Locale locale) {
if (translationSupports == null)
translationSupports = new HashMap<Locale, TranslationSupport>();
TranslationSupport ts = translationSupports.get(locale);
if (ts == null) {
ts = new TranslationSupport();
ts.setTranslationSource((IQueryable<IInstallableUnit>) queryable);
ts.setLocaleProvider(new LocaleProvider() {
public Locale getLocale() {
// TODO Auto-generated method stub
return locale;
}
});
translationSupports.put(locale, ts);
}
return ts;
}
public Iterator<T> iterator() {
@SuppressWarnings("unchecked")
final Iterator<T>[] iteratorCatcher = new Iterator[1];
queryable.query(new ContextQuery<T>() {
public IQueryResult<T> perform(Iterator<T> iterator) {
iteratorCatcher[0] = iterator;
return null;
}
}, new NullProgressMonitor());
return iteratorCatcher[0];
}
}
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