org.apache.oodt.cas.filemgr.cli.action.DumpMetadataCliAction.java Source code

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Here is the source code for org.apache.oodt.cas.filemgr.cli.action.DumpMetadataCliAction.java

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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.apache.oodt.cas.filemgr.cli.action;

//OODT static imports
import static org.apache.oodt.cas.filemgr.metadata.CoreMetKeys.FILENAME;
import static org.apache.oodt.cas.filemgr.metadata.CoreMetKeys.PRODUCT_NAME;

//JDK imports
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;

//Apache imports
import org.apache.commons.lang.Validate;

//OODT imports
import org.apache.oodt.cas.cli.exception.CmdLineActionException;
import org.apache.oodt.cas.filemgr.structs.Product;
import org.apache.oodt.cas.metadata.Metadata;
import org.apache.oodt.cas.metadata.SerializableMetadata;
import org.apache.oodt.commons.xml.XMLUtils;

/**
 * A {@link CmdLineAction} which dumps out metadata for a given {@link Product}.
 * 
 * @author bfoster (Brian Foster)
 */
public class DumpMetadataCliAction extends FileManagerCliAction {

    private String productId;
    private File outputDir;

    @Override
    public void execute(final ActionMessagePrinter printer) throws CmdLineActionException {
        try {
            Validate.notNull(productId, "Must specify productId");

            Product product = getClient().getProductById(productId);
            if (product == null) {
                throw new Exception("FileManager returned null product");
            }
            Metadata metadata = getClient().getMetadata(product);
            if (metadata == null) {
                throw new Exception("FileManager returned null metadata");
            }
            if (outputDir != null) {
                if (outputDir.exists()) {
                    XMLUtils.writeXmlFile(new SerializableMetadata(metadata).toXML(),
                            new File(outputDir.getAbsoluteFile(), generateFilename(metadata)).getAbsolutePath());
                } else {
                    throw new Exception("Output dir '" + outputDir + "' does not exist");
                }
            } else {
                OutputStream os = new OutputStream() {
                    private StringBuffer sb = new StringBuffer("");

                    @Override
                    public void write(int character) throws IOException {
                        sb.append((char) character);
                    }

                    @Override
                    public void close() throws IOException {
                        super.close();
                        printer.println(sb.toString());
                    }
                };
                XMLUtils.writeXmlToStream(new SerializableMetadata(metadata).toXML(), os);
                os.close();
            }
        } catch (Exception e) {
            throw new CmdLineActionException(
                    "Failed to get metadata for product '" + productId + "' : " + e.getMessage(), e);
        }
    }

    public void setProductId(String productId) {
        this.productId = productId;
    }

    public void setOutputDir(File outputDir) {
        this.outputDir = outputDir;
    }

    private String generateFilename(Metadata metadata) {
        String filename = metadata.getMetadata(FILENAME) != null ? metadata.getMetadata(FILENAME)
                : metadata.getMetadata(PRODUCT_NAME);
        return filename + ".met";
    }
}