ImportingPrinterFactory.java

/*
 * Copyright 2013 Cameron Beccario
 *
 * 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.
 */

package net.nullschool.grains.generate;

import net.nullschool.reflect.AbstractTypePrinter;
import net.nullschool.reflect.TypePrinter;


/**
 * 2013-02-12<p/>
 *
 * A factory for TypePrinters tied to a particular Importer. Types printed by this factory will be registered in the
 * importer, building up a set of "import" statements that can then be used in the header of a generated source file.
 * For example, when the class {@code java.util.List} is printed, just the text "List" is emitted to the file, with
 * the importer registering an "import java.util.List" statement.
 *
 * @author Cameron Beccario
 */
final class ImportingPrinterFactory implements TypePrinterFactory {

    private final Importer importer;

    ImportingPrinterFactory(Importer importer) {
        this.importer = importer;
    }

    private class ImportingPrinter extends AbstractTypePrinter {

        @Override public ImportingPrinter print(Class<?> clazz) {
            sb.append(clazz != null ? importer.doImport(clazz) : null);
            return this;
        }
    }

    @Override public TypePrinter newPrinter() {
        return new ImportingPrinter();
    }
}