opennlp.tools.cmdline.CmdLineUtil Maven / Gradle / Ivy
/*
* 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 opennlp.tools.cmdline;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.charset.Charset;
import java.nio.charset.IllegalCharsetNameException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;
import opennlp.tools.util.model.BaseModel;
/**
* Util class for the command line interface.
*
* Note: Do not use this class, internal use only!
*/
public final class CmdLineUtil {
static final int IO_BUFFER_SIZE = 1024 * 1024;
private CmdLineUtil() {
// not intended to be instantiated
}
/**
* Check that the given input file is valid.
*
* To pass the test it must:
* - exist
* - not be a directory
* - accessibly
*
* @param name the name which is used to refer to the file in an error message, it
* should start with a capital letter.
*
* @param inFile the particular file to check to qualify an input file
*
* @throws TerminateToolException if test does not pass this exception is
* thrown and an error message is printed to the console.
*/
public static void checkInputFile(String name, File inFile) {
boolean isFailure;
if (inFile.isDirectory()) {
System.err.println("The " + name + " file is a directory!");
isFailure = true;
}
else if (!inFile.exists()) {
System.err.println("The " + name + " file does not exist!");
isFailure = true;
}
else if (!inFile.canRead()) {
System.err.println("No permissions to read the " + name + " file!");
isFailure = true;
}
else {
isFailure = false;
}
if (isFailure) {
System.err.println("Path: " + inFile.getAbsolutePath());
throw new TerminateToolException(-1);
}
}
/**
* Tries to ensure that it is possible to write to an output file.
*
* The method does nothing if it is possible to write otherwise
* it prints an appropriate error message and a {@link TerminateToolException} is thrown.
*
* Computing the contents of an output file (e.g. ME model) can be very time consuming.
* Prior to this computation it should be checked once that writing this output file is
* possible to be able to fail fast if not. If this validation is only done after a time
* consuming computation it could frustrate the user.
*
* @param name
* @param outFile
*/
public static void checkOutputFile(String name, File outFile) {
boolean isFailure = true;
if (outFile.exists()) {
// The file already exists, ensure that it is a normal file and that it is
// possible to write into it
if (outFile.isDirectory()) {
System.err.println("The " + name + " file is a directory!");
}
else if (outFile.isFile()) {
if (outFile.canWrite()) {
isFailure = false;
}
else {
System.err.println("No permissions to write the " + name + " file!");
}
}
else {
System.err.println("The " + name + " file is not a normal file!");
}
}
else {
// The file does not exist ensure its parent
// directory exists and has write permissions to create
// a new file in it
File parentDir = outFile.getAbsoluteFile().getParentFile();
if (parentDir != null && parentDir.exists()) {
if (parentDir.canWrite()) {
isFailure = false;
}
else {
System.err.println("No permissions to create the " + name + " file!");
}
}
else {
System.err.println("The parent directory of the " + name + " file does not exist, " +
"please create it first!");
}
}
if (isFailure) {
System.err.println("Path: " + outFile.getAbsolutePath());
throw new TerminateToolException(-1);
}
}
public static FileInputStream openInFile(File file) {
try {
return new FileInputStream(file);
} catch (FileNotFoundException e) {
System.err.println("File cannot be found: " + e.getMessage());
throw new TerminateToolException(-1);
}
}
/**
* Writes a {@link BaseModel} to disk. Occurring errors are printed to the console
* to inform the user.
*
* @param modelName type of the model, name is used in error messages.
* @param modelFile output file of the model
* @param model the model itself which should be written to disk
*/
public static void writeModel(String modelName, File modelFile, BaseModel model) {
CmdLineUtil.checkOutputFile(modelName + " model", modelFile);
System.err.print("Writing " + modelName + " model ... ");
long beginModelWritingTime = System.currentTimeMillis();
OutputStream modelOut = null;
try {
modelOut = new BufferedOutputStream(new FileOutputStream(modelFile), IO_BUFFER_SIZE);
model.serialize(modelOut);
} catch (IOException e) {
System.err.println("failed");
System.err.println("Error during writing model file: " + e.getMessage());
throw new TerminateToolException(-1);
} finally {
if (modelOut != null) {
try {
modelOut.close();
} catch (IOException e) {
System.err.println("Failed to properly close model file: " +
e.getMessage());
}
}
}
long modelWritingDuration = System.currentTimeMillis() - beginModelWritingTime;
System.err.printf("done (%.3fs)\n", modelWritingDuration / 1000d);
System.err.println();
System.err.println("Wrote " + modelName + " model to");
System.err.println("path: " + modelFile.getAbsolutePath());
System.err.println();
}
/**
* Retrieves the specified parameters from the given arguments.
*
* @param param
* @param args
* @return
*/
public static String getParameter(String param, String args[]) {
for (int i = 0; i < args.length; i++) {
if (args[i].startsWith("-") && args[i].equals(param)) {
i++;
if (i < args.length) {
return args[i];
}
}
}
return null;
}
/**
* Retrieves the specified parameters from the specified arguments.
*
* @param param
* @param args
* @return
*/
public static Integer getIntParameter(String param, String args[]) {
String value = getParameter(param, args);
try {
if (value != null)
return Integer.parseInt(value);
}
catch (NumberFormatException e) {
}
return null;
}
/**
* Retrieves the specified parameters from the specified arguments.
*
* @param param
* @param args
* @return
*/
public static Double getDoubleParameter(String param, String args[]) {
String value = getParameter(param, args);
try {
if (value != null)
return Double.parseDouble(value);
}
catch (NumberFormatException e) {
}
return null;
}
/**
* Retrieves the "-encoding" parameter.
*
* @param param
* @param args
*
* @return the encoding or if invalid the VM is killed.
*/
public static Charset getEncodingParameter(String args[]) {
String charsetName = getParameter("-encoding", args);
try {
if (charsetName != null) {
if (Charset.isSupported(charsetName)) {
return Charset.forName(charsetName);
} else {
System.out.println("Error: Unsuppoted encoding " + charsetName + ".");
throw new TerminateToolException(-1);
}
}
} catch (IllegalCharsetNameException e) {
System.out.println("Error: encoding name(" + e.getCharsetName()
+ ") is invalid.");
throw new TerminateToolException(-1);
}
// TODO: Can still return null if encoding is not specified at all ...
return null;
}
public static void checkLanguageCode(String code) {
List languageCodes = new ArrayList();
languageCodes.addAll(Arrays.asList(Locale.getISOLanguages()));
languageCodes.add("x-unspecified");
if (!languageCodes.contains(code)) {
System.err.println("Unkown language code, must be an ISO 639 code!");
throw new TerminateToolException(-1);
}
}
public static boolean containsParam(String param, String args[]) {
for (int i = 0; i < args.length; i++) {
if (args[i].equals(param)) {
return true;
}
}
return false;
}
public static void printTrainingIoError(IOException e) {
System.err.println("IO error while reading training data or indexing data: " + e.getMessage());
}
public static void handleStdinIoError(IOException e) {
System.err.println("IO Error while reading from stdin: " + e.getMessage());
throw new TerminateToolException(-1);
}
}