/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.netbeans.modules.css.lib;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.netbeans.modules.css.lib.api.CssParserResult;
import org.netbeans.modules.css.lib.api.ErrorsProvider;
import org.netbeans.modules.css.lib.api.FilterableError;
import org.openide.util.Lookup;

/**
 *
 * @author marekfukala
 */
public class ErrorsProviderQuery {

    private static Collection<? extends ErrorsProvider> providers;
    
    private static synchronized Collection<? extends ErrorsProvider> getProviders() {
        if(providers == null) {
            providers = Lookup.getDefault().lookupAll(ErrorsProvider.class);
        }
        return providers;
    }
    
    public static List<? extends FilterableError> getExtendedDiagnostics(CssParserResult parserResult) {
        List<FilterableError> errors = new ArrayList<>();
        for(ErrorsProvider provider : getProviders()) {
            errors.addAll(provider.getExtendedDiagnostics(parserResult));
        }
        return errors;
    }
    
}
