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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.sis.console;
import java.util.EnumSet;
import java.io.Console;
import java.io.IOException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.JAXBException;
import org.opengis.metadata.Metadata;
import org.opengis.referencing.ReferenceSystem;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.apache.sis.io.wkt.WKTFormat;
import org.apache.sis.io.wkt.Convention;
import org.apache.sis.io.wkt.Colors;
import org.apache.sis.metadata.MetadataStandard;
import org.apache.sis.metadata.ValueExistencePolicy;
import org.apache.sis.storage.DataStore;
import org.apache.sis.storage.DataStores;
import org.apache.sis.storage.DataStoreException;
import org.apache.sis.util.collection.TableColumn;
import org.apache.sis.util.collection.TreeTable;
import org.apache.sis.util.collection.TreeTableFormat;
import org.apache.sis.util.resources.Errors;
import org.apache.sis.xml.MarshallerPool;
import org.apache.sis.xml.XML;
/**
* The "metadata" and "crs" subcommands.
* CRS are considered as a kind of metadata here.
*
* @author Martin Desruisseaux (Geomatys)
* @since 0.3
* @version 0.4
* @module
*/
final class MetadataSC extends SubCommand {
/**
* {@code true} for the {@code "crs"} sub-command,
* or {@code false} for the {@code "metadata"} sub-command.
*/
private final boolean isCRS;
/**
* Creates the {@code "metadata"} or {@code "crs"} sub-command.
*
* @param isCRS {@code true} for the {@code "crs"} sub-command,
* or {@code false} for the {@code "metadata"} sub-command.
*/
MetadataSC(final boolean isCRS, final int commandIndex, final String... args) throws InvalidOptionException {
super(commandIndex, args, EnumSet.of(Option.FORMAT, Option.LOCALE, Option.TIMEZONE, Option.ENCODING,
Option.COLORS, Option.HELP));
this.isCRS = isCRS;
}
/**
* Prints metadata or CRS information.
*
* @throws DataStoreException If an error occurred while reading the file.
* @throws JAXBException If an error occurred while producing the XML output.
* @throws IOException Should never happen, since we are appending to a print writer.
*/
@Override
public int run() throws InvalidOptionException, DataStoreException, JAXBException, IOException {
/*
* Output format can be either "text" (the default) or "xml".
* In the case of "crs" sub-command, we accept also WKT variants.
*/
boolean toXML = false;
Convention wkt = null;
final String format = options.get(Option.FORMAT);
if (format != null && !format.equalsIgnoreCase("text")) {
toXML = format.equalsIgnoreCase("xml");
if (!toXML) {
if (isCRS) {
if (format.equalsIgnoreCase("wkt") || format.equalsIgnoreCase("wkt2")) {
wkt = Convention.WKT2;
} else if (format.equalsIgnoreCase("wkt1")) {
wkt = Convention.WKT1;
}
}
if (wkt == null) {
throw new InvalidOptionException(Errors.format(
Errors.Keys.IllegalOptionValue_2, "format", format), format);
}
}
}
/*
* Read metadata from the data storage.
* If we are executing the "crs" sub-command, extract the first CRS.
*/
if (hasUnexpectedFileCount(1, 1)) {
return Command.INVALID_ARGUMENT_EXIT_CODE;
}
final Metadata metadata;
final DataStore store = DataStores.open(files.get(0));
try {
metadata = store.getMetadata();
} finally {
store.close();
}
if (metadata == null) {
return 0;
}
CoordinateReferenceSystem crs = null;
if (isCRS) {
for (final ReferenceSystem rs : metadata.getReferenceSystemInfo()) {
if (rs instanceof CoordinateReferenceSystem) {
crs = (CoordinateReferenceSystem) rs;
break;
}
}
if (crs == null) {
return 0;
}
}
/*
* Format metadata to the standard output stream.
*/
if (toXML) {
final MarshallerPool pool = new MarshallerPool(null);
final Marshaller marshaller = pool.acquireMarshaller();
marshaller.setProperty(XML.LOCALE, locale);
marshaller.setProperty(XML.TIMEZONE, timezone);
if (isConsole()) {
marshaller.marshal(crs != null ? crs : metadata, out);
} else {
out.flush();
marshaller.setProperty(Marshaller.JAXB_ENCODING, encoding.name());
marshaller.marshal(crs != null ? crs : metadata, System.out); // Use OutputStream instead than Writer.
System.out.flush();
}
} else if (wkt != null) {
final WKTFormat f = new WKTFormat(locale, timezone);
f.setConvention(wkt);
if (colors) {
f.setColors(Colors.DEFAULT);
}
f.format(crs, out);
out.println();
} else {
final TreeTable tree = MetadataStandard.ISO_19115.asTreeTable(metadata, ValueExistencePolicy.NON_EMPTY);
final TreeTableFormat tf = new TreeTableFormat(locale, timezone);
tf.setColumns(TableColumn.NAME, TableColumn.VALUE);
tf.format(tree, out);
}
out.flush();
return 0;
}
/**
* Returns {@code true} if {@link #out} is sending its output to the console.
* If not, then we are probably writing to a file or the user specified his own encoding.
* In such case, we will send the XML output to an {@code OutputStream} instead than to a
* {@code Writer} and let the marshaller apply the encoding itself.
*/
private boolean isConsole() {
if (outputBuffer != null) return true; // Special case for JUnit tests only.
final Console console = System.console();
return (console != null) && console.writer() == out;
}
}
