diff options
Diffstat (limited to 'src/main/java/org/onap/dcae/common/XmlParser.java')
| -rwxr-xr-x | src/main/java/org/onap/dcae/common/XmlParser.java | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/src/main/java/org/onap/dcae/common/XmlParser.java b/src/main/java/org/onap/dcae/common/XmlParser.java new file mode 100755 index 0000000..06a4a66 --- /dev/null +++ b/src/main/java/org/onap/dcae/common/XmlParser.java @@ -0,0 +1,178 @@ +/*- + * ============LICENSE_START======================================================= + * org.onap.dcaegen2.collectors.restconf + * ================================================================================ + * Copyright (C) 2018-2019 Huawei. 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.dcae.common; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import org.xml.sax.Attributes; +import org.xml.sax.SAXException; +import org.xml.sax.helpers.DefaultHandler; + +import javax.xml.parsers.ParserConfigurationException; +import javax.xml.parsers.SAXParser; +import javax.xml.parsers.SAXParserFactory; +import java.io.ByteArrayInputStream; +import java.io.IOException; +import java.io.InputStream; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Map; +import java.util.Set; + +import static com.google.common.base.Preconditions.checkNotNull; + +public class XmlParser { + + private static final Logger log = LoggerFactory.getLogger(XmlParser.class); + + private XmlParser() { + // Preventing instantiation of the same. + } + + public static Map<String, String> convertToProperties(String s, Set<String> listNameList) + throws Exception { + + checkNotNull(s, "Input should not be null."); + + Handler handler = new Handler(listNameList); + try { + SAXParserFactory factory = SAXParserFactory.newInstance(); + SAXParser saxParser = factory.newSAXParser(); + InputStream in = new ByteArrayInputStream(s.getBytes()); + saxParser.parse(in, handler); + } catch (ParserConfigurationException | IOException | SAXException | NumberFormatException e) { + throw new Exception("Unable to convert XML to properties" + e.getLocalizedMessage(), e); + } + return handler.getProperties(); + } + + private static class Handler extends DefaultHandler { + + private Set<String> listNameList; + + private Map<String, String> properties = new HashMap<>(); + + public Map<String, String> getProperties() { + return properties; + } + + public Handler(Set<String> listNameList) { + super(); + this.listNameList = listNameList; + if (this.listNameList == null) { + this.listNameList = new HashSet<>(); + } + } + + StringBuilder currentName = new StringBuilder(); + StringBuilder currentValue = new StringBuilder(); + + @Override + public void startElement(String uri, String localName, String qName, Attributes attributes) + throws SAXException { + super.startElement(uri, localName, qName, attributes); + + String name = localName; + if (name == null || name.trim().length() == 0) { + name = qName; + } + int i2 = name.indexOf(':'); + if (i2 >= 0) { + name = name.substring(i2 + 1); + } + + if (currentName.length() > 0) { + currentName.append(Character.toString('.')); + } + currentName.append(name); + + String listName = removeIndexes(currentName.toString()); + + if (listNameList.contains(listName)) { + String n = currentName.toString() + "_length"; + int len = getInt(properties, n); + properties.put(n, String.valueOf(len + 1)); + currentName.append("[").append(len).append("]"); + } + } + + @Override + public void endElement(String uri, String localName, String qName) throws SAXException { + super.endElement(uri, localName, qName); + + String name = localName; + if (name == null || name.trim().length() == 0) { + name = qName; + } + int i2 = name.indexOf(':'); + if (i2 >= 0) { + name = name.substring(i2 + 1); + } + + String s = currentValue.toString().trim(); + if (s.length() > 0) { + properties.put(currentName.toString(), s); + + log.info("Added property: {} : {}", currentName, s); + currentValue = new StringBuilder(); + } + + int i1 = currentName.lastIndexOf("." + name); + if (i1 <= 0) { + currentName = new StringBuilder(); + } else { + currentName = new StringBuilder(currentName.substring(0, i1)); + } + } + + @Override + public void characters(char[] ch, int start, int length) throws SAXException { + super.characters(ch, start, length); + + String value = new String(ch, start, length); + currentValue.append(value); + } + + private static int getInt(Map<String, String> mm, String name) { + String s = mm.get(name); + if (s == null) { + return 0; + } + return Integer.parseInt(s); + } + + private String removeIndexes(String currentName) { + StringBuilder b = new StringBuilder(); + boolean add = true; + for (int i = 0; i < currentName.length(); i++) { + char c = currentName.charAt(i); + if (c == '[') { + add = false; + } else if (c == ']') { + add = true; + } else if (add) { + b.append(Character.toString(c)); + } + } + return b.toString(); + } + } +} |