opennlp.tools.cmdline.ModelLoader 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.BufferedInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import opennlp.tools.util.InvalidFormatException;
/**
* Loads a model and does all the error handling for the command line tools.
*
* Note: Do not use this class, internal use only!
*
* @param
*/
public abstract class ModelLoader {
private final String modelName;
protected ModelLoader(String modelName) {
if (modelName == null)
throw new IllegalArgumentException("modelName must not be null!");
this.modelName = modelName;
}
protected abstract T loadModel(InputStream modelIn) throws IOException;
public T load(File modelFile) {
long beginModelLoadingTime = System.currentTimeMillis();
CmdLineUtil.checkInputFile(modelName + " model", modelFile);
System.err.print("Loading " + modelName + " model ... ");
T model;
try (InputStream modelIn = new BufferedInputStream(
CmdLineUtil.openInFile(modelFile), CmdLineUtil.IO_BUFFER_SIZE)) {
model = loadModel(modelIn);
}
catch (InvalidFormatException e) {
System.err.println("failed");
throw new TerminateToolException(-1, "Model has invalid format", e);
}
catch (IOException e) {
System.err.println("failed");
throw new TerminateToolException(-1, "IO error while loading model file '" + modelFile + "'", e);
}
long modelLoadingDuration = System.currentTimeMillis() - beginModelLoadingTime;
System.err.printf("done (%.3fs)\n", modelLoadingDuration / 1000d);
return model;
}
}