io.wcm.tooling.netbeans.sightly.completion.classLookup.ClassLookupResolver.java Source code

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Here is the source code for io.wcm.tooling.netbeans.sightly.completion.classLookup.ClassLookupResolver.java

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/*
 * #%L
 * wcm.io
 * %%
 * Copyright (C) 2014 wcm.io
 * %%
 * Licensed 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.
 * #L%
 */
package io.wcm.tooling.netbeans.sightly.completion.classLookup;

import io.wcm.tooling.netbeans.sightly.completion.BasicCompletionItem;
import java.util.ArrayList;
import java.util.EnumSet;
import java.util.List;
import java.util.Set;
import javax.lang.model.element.TypeElement;
import org.apache.commons.lang.StringUtils;
import org.netbeans.api.java.source.ClassIndex;
import org.netbeans.api.java.source.ClasspathInfo;
import org.netbeans.api.java.source.ElementHandle;
import org.netbeans.spi.editor.completion.CompletionItem;

/**
 * Resolver for Class lookup
 */
public class ClassLookupResolver {

    private final ClasspathInfo classpath;

    public ClassLookupResolver(ClasspathInfo classpath) {
        this.classpath = classpath;
    }

    /**
     * returns a list with all classes matchting the given filter
     */
    public List<CompletionItem> resolve(String filter, int startOffset, int caretOffset) {
        final Set<ElementHandle<TypeElement>> result = classpath.getClassIndex().getDeclaredTypes("",
                ClassIndex.NameKind.PREFIX, EnumSet.of(ClassIndex.SearchScope.SOURCE));
        List<CompletionItem> ret = new ArrayList<>();

        for (ElementHandle<TypeElement> te : result) {
            if (te.getKind().isClass()) {
                String binaryName = te.getBinaryName();
                if (!StringUtils.equals(binaryName, "") && StringUtils.startsWith(binaryName, filter)) {
                    ret.add(new BasicCompletionItem(te.getBinaryName(), false, startOffset, caretOffset));
                }
            }
        }
        return ret;
    }

}