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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2020 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.plugins.etsi.nfv.nsd.builder;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Collection;
import java.util.HashSet;
import java.util.LinkedHashSet;
/**
* Builder for the manifest (.mf) file in a NSD CSAR
*/
public class NsdCsarManifestBuilder {
private static final String METADATA = "metadata";
private static final String SOURCE = "Source";
private static final String NSD_DESIGNER = "nsd_designer";
private static final String NSD_FILE_STRUCTURE_VERSION = "nsd_file_structure_version";
private static final String NSD_RELEASE_DATE_TIME = "nsd_release_date_time";
private static final String NSD_NAME = "nsd_name";
private static final String NSD_INVARIANT_ID = "nsd_invariant_id";
private static final String ATTRIBUTE_SEPARATOR = ": ";
private static final String NEW_LINE = "\n";
private static final DateTimeFormatter RFC_3339_DATE_TIME_FORMATTER =
DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ssZ");
private final StringBuilder builder;
private final StringBuilder metadataBuilder;
private final StringBuilder sourceBuilder;
private final MetadataHeader metadataHeader;
private final HashSet<String> sources;
public NsdCsarManifestBuilder() {
builder = new StringBuilder();
metadataBuilder = new StringBuilder();
sourceBuilder = new StringBuilder();
metadataHeader = new MetadataHeader();
sources = new LinkedHashSet<>();
metadataBuilder.append(METADATA).append(ATTRIBUTE_SEPARATOR)
.append(NEW_LINE);
}
/**
* Sets a value for the {@link #NSD_DESIGNER} manifest entry.
*
* @param designer the value
* @return the builder instance
*/
public NsdCsarManifestBuilder withDesigner(final String designer) {
metadataHeader.designer = designer;
return this;
}
/**
* Sets a value for the {@link #NSD_INVARIANT_ID} manifest entry.
*
* @param invariantId the value
* @return the builder instance
*/
public NsdCsarManifestBuilder withInvariantId(final String invariantId) {
metadataHeader.invariantId = invariantId;
return this;
}
/**
* Sets a value for the {@link #NSD_NAME} manifest entry.
*
* @param nsdName the value
* @return the builder instance
*/
public NsdCsarManifestBuilder withName(final String nsdName) {
metadataHeader.nsdName = nsdName;
return this;
}
/**
* Sets the current date time to the {@link #NSD_RELEASE_DATE_TIME} manifest entry.
*
* @return the builder instance
*/
public NsdCsarManifestBuilder withNowReleaseDateTime() {
metadataHeader.nsdReleaseDateTime = getNowDateTime();
return this;
}
/**
* Sets a value for the {@link #NSD_FILE_STRUCTURE_VERSION} manifest entry.
*
* @param fileStructureVersion the value
* @return the builder instance
*/
public NsdCsarManifestBuilder withFileStructureVersion(final String fileStructureVersion) {
metadataHeader.fileStructureVersion = fileStructureVersion;
return this;
}
/**
* Add a list of {@link #SOURCE} entries to the manifest
*
* @param sources a list of source path
* @return the builder instance
*/
public NsdCsarManifestBuilder withSources(final Collection<String> sources) {
this.sources.addAll(sources);
return this;
}
/**
* Builds a string representing the manifest content based on provided values.
*
* @return a string representing the manifest content
*/
public String build() {
appendEntry(metadataBuilder, NSD_DESIGNER, metadataHeader.designer);
appendEntry(metadataBuilder, NSD_INVARIANT_ID, metadataHeader.invariantId);
appendEntry(metadataBuilder, NSD_NAME, metadataHeader.nsdName);
appendEntry(metadataBuilder, NSD_RELEASE_DATE_TIME, metadataHeader.nsdReleaseDateTime);
appendEntry(metadataBuilder, NSD_FILE_STRUCTURE_VERSION, metadataHeader.fileStructureVersion);
sources.forEach(source -> appendEntry(sourceBuilder, SOURCE, source));
builder.append(metadataBuilder)
.append(NEW_LINE)
.append(sourceBuilder);
return builder.toString();
}
private String getNowDateTime() {
return ZonedDateTime.now().format(RFC_3339_DATE_TIME_FORMATTER);
}
private void appendEntry(final StringBuilder builder, final String entry, final String value) {
if (value != null) {
builder.append(entry).append(ATTRIBUTE_SEPARATOR).append(value)
.append(NEW_LINE);
}
}
private class MetadataHeader {
private String fileStructureVersion;
private String nsdName;
private String nsdReleaseDateTime;
private String designer;
private String invariantId;
}
}
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