org.netbeans.modules.maven.grammar.MavenQueryProvider Maven / Gradle / Ivy

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/*
 * 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.maven.grammar;

import java.beans.FeatureDescriptor;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import org.netbeans.modules.xml.api.model.GrammarEnvironment;
import org.netbeans.modules.xml.api.model.GrammarQuery;
import org.netbeans.modules.xml.api.model.GrammarQueryManager;
import org.openide.util.Lookup;
import org.openide.util.Lookup.Item;
import org.openide.util.Lookup.Result;
import org.w3c.dom.Node;
/**
 * 
 * @author mkleint
 */

public final class MavenQueryProvider extends GrammarQueryManager {

    private List grammars;
    public MavenQueryProvider() {
        grammars = new ArrayList();
        Result result = Lookup.getDefault().lookupResult(GrammarFactory.class);
        Collection> items = result.allItems();
        for (Item item : items) {
            grammars.add(item.getInstance());
        }

    }
    
    @Override
    public Enumeration enabled(GrammarEnvironment ctx) {
        // check if is supported environment..
        if (getGrammar(ctx) != null) {
            Enumeration en = ctx.getDocumentChildren();
            while (en.hasMoreElements()) {
                Node next = (Node)en.nextElement();
                if (next.getNodeType() == Node.ELEMENT_NODE) {
                    return Collections.enumeration(Collections.singletonList(next));
                }
            }
        }
        return null;
    }
    
    @Override
    public FeatureDescriptor getDescriptor() {
        return new FeatureDescriptor();
    }
    
    @Override
    public GrammarQuery getGrammar(GrammarEnvironment env) {
        for (GrammarFactory gr : grammars) {
            GrammarQuery query = gr.isSupported(env);
            if (query != null) {
                return query;
            }
        }
        return null;
    }
    
}