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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-18 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.aai.nodes;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.*;
import java.io.ByteArrayInputStream;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.xml.XMLConstants;
import javax.xml.bind.JAXBException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.eclipse.persistence.jaxb.JAXBContextProperties;
import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContext;
import org.eclipse.persistence.jaxb.dynamic.DynamicJAXBContextFactory;
import org.onap.aai.setup.ConfigTranslator;
import org.onap.aai.setup.SchemaVersion;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import com.google.common.base.CaseFormat;
@Component
/**
* NodeIngestor - ingests A&AI OXM files per given config, serves DynamicJAXBContext per version
*/
public class NodeIngestor {
private Map<SchemaVersion, DynamicJAXBContext> versionContextMap = new TreeMap<>();
private Map<SchemaVersion, Set<String>> typesPerVersion = new TreeMap<>();
private Map<SchemaVersion, Document> schemaPerVersion = new TreeMap<>();
private static final Pattern classNamePattern = Pattern.compile("\\.(v\\d+)\\.");
private ConfigTranslator translator;
@Autowired
/**
* Instantiates the NodeIngestor bean.
*
* @param translator - ConfigTranslator autowired in by Spring framework which
* contains the configuration information needed to ingest the desired files.
*/
public NodeIngestor(ConfigTranslator translator) {
this.translator = translator;
Map<SchemaVersion, List<String>> filesToIngest = translator.getNodeFiles();
try {
for (Entry<SchemaVersion, List<String>> verFiles : filesToIngest.entrySet()) {
SchemaVersion v = verFiles.getKey();
List<String> files = verFiles.getValue();
final DynamicJAXBContext ctx = ingest(files);
versionContextMap.put(v, ctx);
typesPerVersion.put(v, getAllNodeTypes(files));
schemaPerVersion.put(v, createCombinedSchema(files, v));
}
} catch (JAXBException | ParserConfigurationException | SAXException | IOException e) {
throw new ExceptionInInitializerError(e);
}
}
/**
* Ingests the given OXM files into DynamicJAXBContext
*
* @param files - List<String> of full filenames (ie including the path) to be ingested
*
* @return DynamicJAXBContext including schema information from all given files
*
* @throws FileNotFoundException if an OXM file can't be found
* @throws JAXBException if there's an error creating the DynamicJAXBContext
*/
private DynamicJAXBContext ingest(List<String> files) throws FileNotFoundException, JAXBException {
List<InputStream> streams = new ArrayList<>();
for (String name : files) {
streams.add(new FileInputStream(new File(name)));
}
Map<String, Object> properties = new HashMap<>();
properties.put(JAXBContextProperties.OXM_METADATA_SOURCE, streams);
return DynamicJAXBContextFactory.createContextFromOXM(this.getClass().getClassLoader(), properties);
}
private Set<String> getAllNodeTypes(List<String> files) throws ParserConfigurationException, SAXException, IOException {
Set<String> types = new HashSet<>();
final DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
docFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
final DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
ArrayList<Node> javaTypes = new ArrayList<Node>();
for (String file : files) {
InputStream inputStream = new FileInputStream(file);
final Document doc = docBuilder.parse(inputStream);
final NodeList list = doc.getElementsByTagName("java-type");
for (int i = 0; i < list.getLength(); i++) {
String type = list.item(i).getAttributes().getNamedItem("name").getNodeValue();
javaTypes.add(list.item(i));
types.add(CaseFormat.UPPER_CAMEL.to(CaseFormat.LOWER_HYPHEN, type));
}
}
return types;
}
private Document createCombinedSchema(List<String> files,SchemaVersion v) throws ParserConfigurationException, SAXException, IOException {
final DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
docFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
final DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
DocumentBuilder masterDocBuilder = docFactory.newDocumentBuilder();
Document combinedDoc = masterDocBuilder.parse(getShell(v));
NodeList masterList = combinedDoc.getElementsByTagName("java-types");
Node javaTypesContainer = masterList.getLength() == 0 ? combinedDoc.getDocumentElement() : masterList.item(0);
for (String file : files) {
InputStream inputStream = new FileInputStream(file);
final Document doc = docBuilder.parse(inputStream);
final NodeList list = doc.getElementsByTagName("java-type");
for (int i = 0; i < list.getLength(); i++) {
Node copy = combinedDoc.importNode(list.item(i),true);
javaTypesContainer.appendChild(copy);
}
}
return combinedDoc;
}
/**
* Gets the DynamicJAXBContext for the given version
*
* @param v
* @return DynamicJAXBContext
*/
public DynamicJAXBContext getContextForVersion(SchemaVersion v) {
return versionContextMap.get(v);
}
/**
* Determines if the given version contains the given node type
*
* @param nodeType - node type to check, must be in lower hyphen form (ie "type-name")
* @param v - schema version to check against
* @return
*/
public boolean hasNodeType(String nodeType, SchemaVersion v) {
return typesPerVersion.get(v).contains(nodeType);
}
public Set<String> getObjectsInVersion(SchemaVersion v){
return typesPerVersion.get(v);
}
/**
* Determines if the given version contains the given node type
*
* @param String nodeType - node type to check, must be in lower hyphen form (ie "type-name")
* @param v
* @return
*/
public Document getSchema(SchemaVersion v) {
return schemaPerVersion.get(v);
}
private InputStream getShell(SchemaVersion v) {
String source = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
"<xml-bindings xmlns=\"http://www.eclipse.org/eclipselink/xsds/persistence/oxm\" package-name=\"inventory.aai.onap.org."+v.toString().toLowerCase()+"\" xml-mapping-metadata-complete=\"true\">\n" +
" <xml-schema element-form-default=\"QUALIFIED\">\n" +
" <xml-ns namespace-uri=\"http://org.onap.aai.inventory/"+v.toString().toLowerCase()+"\" />\n" +
" </xml-schema>\n" +
" <java-types>\n" +
" </java-types>\\n" +
"</xml-bindings>";
// source.rep.replace("v11", v.toString());
return new ByteArrayInputStream(source.getBytes(StandardCharsets.UTF_8));
}
public SchemaVersion getVersionFromClassName (String classname) {
Matcher m = classNamePattern.matcher(classname);
String version = null;
if (m.find()) {
version = m.group(1);
return new SchemaVersion(version);
} else {
return translator.getSchemaVersions().getDefaultVersion();
}
}
}
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