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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* Modifications Copyright (C) 2021-2022 Nordix Foundation.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.model.basicmodel.handling;
import java.io.File;
import java.io.FileOutputStream;
import lombok.Getter;
import lombok.Setter;
import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
import org.onap.policy.apex.model.basicmodel.concepts.AxModel;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;
/**
* This class writes an Apex model to a file.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
* @param <M> the type of Apex model to write to file, must be a sub class of {@link AxModel}
*/
@Getter
@Setter
public class ApexModelFileWriter<M extends AxModel> {
private static final XLogger LOGGER = XLoggerFactory.getXLogger(ApexModelFileWriter.class);
// Should models being written to files be valid
private boolean validate;
/**
* Constructor, set the validation flag.
*
* @param validate indicates if validation be performed prior to output
*/
public ApexModelFileWriter(final boolean validate) {
this.validate = validate;
}
/**
* Write a model to an JSON file.
*
* @param model The model to write
* @param rootModelClass The concept class
* @param modelFileName The name of the file to write to
* @throws ApexException thrown on errors
*/
public void apexModelWriteJsonFile(final M model, final Class<M> rootModelClass, final String modelFileName)
throws ApexException {
LOGGER.debug("running apexModelWriteJSONFile . . .");
final ApexModelWriter<M> modelWriter = new ApexModelWriter<>(rootModelClass);
modelWriter.setValidate(validate);
writeModelFile(model, modelWriter, modelFileName);
LOGGER.debug("ran apexModelWriteJSONFile");
}
/**
* Write a model to a file using a model writer.
*
* @param model The model to write
* @param modelWriter the model writer to use to write the model to the file
* @param modelFileName the file name of the file to write to
* @throws ApexException on exceptions writing the model
*/
private void writeModelFile(final M model, final ApexModelWriter<M> modelWriter, final String modelFileName)
throws ApexException {
final var modelFile = new File(modelFileName);
if (!modelFile.getParentFile().exists() && !modelFile.getParentFile().mkdirs()) {
LOGGER.warn("could not create directory " + modelFile.getParentFile());
throw new ApexException("could not create directory " + modelFile.getParentFile());
}
try (final var fileOutputStream = new FileOutputStream(modelFile)) {
modelWriter.write(model, fileOutputStream);
} catch (final Exception e) {
LOGGER.warn("error processing file " + modelFile.getAbsolutePath(), e);
throw new ApexException("error processing file " + modelFile.getAbsolutePath(), e);
}
}
}
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