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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2021 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.openecomp.sdc.be.components.impl;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import org.apache.commons.lang3.StringUtils;
import org.openecomp.sdc.be.datatypes.enums.ModelTypeEnum;
import org.openecomp.sdc.be.model.Model;
import org.openecomp.sdc.be.model.jsonjanusgraph.operations.exception.ModelOperationExceptionSupplier;
import org.openecomp.sdc.be.model.operations.impl.ModelOperation;
import org.openecomp.sdc.common.zip.ZipUtils;
import org.openecomp.sdc.common.zip.exception.ZipException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
/**
* This class is responsible for handling the business logic of a Model.
*/
@Component("modelBusinessLogic")
public class ModelBusinessLogic {
private static final Logger LOGGER = LoggerFactory.getLogger(ModelBusinessLogic.class);
private final ModelOperation modelOperation;
private final DataTypeImportManager dataTypeImportManager;
@Autowired
public ModelBusinessLogic(final ModelOperation modelOperation, final DataTypeImportManager dataTypeImportManager) {
this.modelOperation = modelOperation;
this.dataTypeImportManager = dataTypeImportManager;
}
/**
* Creates a model along with given data types. The data types must be provided in a yaml format, where each entry is one data type object, for
* example:
* <pre>
* tosca.datatypes.TimeInterval:
* derived_from: tosca.datatypes.Root
* [...]
*
* tosca.datatypes.network.NetworkInfo:
* derived_from: tosca.datatypes.Root
* [...]
* </pre>
*
* @param model the model to create
* @param datatypesYaml the data types to create in yaml format. It can contain multiple data types entries.
* @return the created model.
*/
public Model createModel(final Model model, final String datatypesYaml) {
createModel(model);
dataTypeImportManager.createDataTypes(datatypesYaml, model.getName(), true);
return model;
}
public Model createModel(final Model model) {
LOGGER.debug("creating model {}", model);
return modelOperation.createModel(model, false);
}
public Optional<Model> findModel(final String modelName) {
if (StringUtils.isEmpty(modelName)) {
return Optional.empty();
}
return modelOperation.findModelByName(modelName);
}
/**
* Loads the list of models.
*
* @return the list of models
*/
public List<Model> listModels() {
return modelOperation.findAllModels();
}
public List<Model> listModels(final ModelTypeEnum modelType) {
return modelOperation.findModels(modelType);
}
public void createModelImports(final String modelName, final InputStream modelImportsZip) {
if (StringUtils.isEmpty(modelName)) {
throw ModelOperationExceptionSupplier.invalidModel(modelName).get();
}
if (modelImportsZip == null) {
throw ModelOperationExceptionSupplier.emptyModelImports().get();
}
if (findModel(modelName).isEmpty()) {
throw ModelOperationExceptionSupplier.invalidModel(modelName).get();
}
final var fileBytes = readBytes(modelImportsZip);
final Map<String, byte[]> zipFilesPathContentMap = unzipInMemory(fileBytes);
if (zipFilesPathContentMap.isEmpty()) {
throw ModelOperationExceptionSupplier.emptyModelImports().get();
}
modelOperation.createModelImports(modelName, zipFilesPathContentMap);
}
private Map<String, byte[]> unzipInMemory(final byte[] fileBytes) {
try {
return ZipUtils.readZip(fileBytes, false);
} catch (final ZipException e) {
throw ModelOperationExceptionSupplier.couldNotReadImports().get();
}
}
private byte[] readBytes(final InputStream modelImportsZip) {
try (final InputStream in = modelImportsZip; final ByteArrayOutputStream os = new ByteArrayOutputStream()) {
final var buffer = new byte[1024];
int len;
while ((len = in.read(buffer)) != -1) {
os.write(buffer, 0, len);
}
return os.toByteArray();
} catch (final IOException e) {
LOGGER.debug("Could not read the model imports zip", e);
throw ModelOperationExceptionSupplier.couldNotReadImports().get();
}
}
}
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