com.alibaba.antx.config.entry.DirectoryConfigEntry Maven / Gradle / Ivy

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/*
 * Copyright (c) 2002-2012 Alibaba Group Holding Limited.
 * All rights reserved.
 *
 * 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 com.alibaba.antx.config.entry;

import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;

import com.alibaba.antx.config.ConfigException;
import com.alibaba.antx.config.ConfigResource;
import com.alibaba.antx.config.ConfigSettings;
import com.alibaba.antx.config.generator.ConfigGeneratorSession;
import com.alibaba.antx.config.generator.DirectoryCallback;
import com.alibaba.antx.util.scanner.DirectoryScanner;
import com.alibaba.antx.util.scanner.Scanner;
import com.alibaba.antx.util.scanner.ScannerException;

/**
 * 代表一个目录类型的配置项信息。
 *
 * @author Michael Zhou
 */
public class DirectoryConfigEntry extends ConfigEntry {
    /**
     * 创建一个结点。
     *
     * @param resource 指定结点的资源
     * @param settings antxconfig的设置
     */
    public DirectoryConfigEntry(ConfigResource resource, File outputFile, ConfigSettings settings) {
        super(resource, outputFile, settings);
    }

    /** 扫描结点。 */
    @Override
    protected void scan(InputStream istream) {
        Handler handler = new Handler();
        Scanner scanner = new DirectoryScanner(getConfigEntryResource().getFile(), handler);

        try {
            scanner.scan();
        } catch (ScannerException e) {
            throw new ConfigException(e);
        }

        subEntries = handler.getSubEntries();

        getGenerator().init();
    }

    /** 生成配置文件。 */
    @Override
    protected boolean generate(InputStream istream, OutputStream ostream) {
        getConfigSettings().debug("Processing files in " + getConfigEntryResource().getURL());

        boolean allSuccess = true;

        // 处理自己的descriptors
        try {
            ConfigGeneratorSession session = getGenerator().startSession(getConfigSettings().getPropertiesSet());

            allSuccess &= session.generate(new DirectoryCallback(getGenerator(), getOutputFile()));
        } finally {
            getGenerator().closeSession();
        }

        // 处理子entries
        ConfigEntry[] subEntries = getSubEntries();

        for (ConfigEntry subEntry : subEntries) {
            allSuccess &= subEntry.generate(null, null);
        }

        return allSuccess;
    }

    /**
     * 转换成字符串。
     *
     * @return 字符串表示
     */
    @Override
    public String toString() {
        return "DirectoryConfigEntry[" + getConfigEntryResource() + "]";
    }
}