com.sap.psr.vulas.java.PomParser Maven / Gradle / Ivy

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/**
 * This file is part of Eclipse Steady.
 *
 * 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
 *
 * Copyright (c) 2018 SAP SE or an SAP affiliate company. All rights reserved.
 */
package com.sap.psr.vulas.java;

import java.util.Arrays;
import java.util.Stack;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

import com.sap.psr.vulas.shared.json.model.LibraryId;

/**
 * Creates a {@link LibraryId} for a given pom.xml.
 */
public class PomParser extends DefaultHandler {

	private static final Log log = LogFactory.getLog(PomParser.class);
	
	private static final String[] pg = new String[] {"project", "parent", "groupId"};
	private static final String[] pa = new String[] {"project", "parent", "artifactId"};
	private static final String[] pv = new String[] {"project", "parent", "version"};
	
	private static final String[] g = new String[] {"project", "groupId"};
	private static final String[] a = new String[] {"project", "artifactId"};
	private static final String[] v = new String[] {"project", "version"};

	private Stack stack = new Stack();
	
	private LibraryId libid = new LibraryId();
		
	/** {@inheritDoc} */
	public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
		this.stack.push(localName);
	}
	
	/** {@inheritDoc} */
	public void characters (char ch[], int start, int length) throws SAXException {
		//log.info(stack.toString());		
		if(Arrays.equals(stack.toArray(), pg) || Arrays.equals(stack.toArray(), g)) {
			if(libid.getMvnGroup()==null || Arrays.equals(stack.toArray(), g))
				libid.setMvnGroup(new String(Arrays.copyOfRange(ch, start, start+length)));
		}
		else if(Arrays.equals(stack.toArray(), pa) || Arrays.equals(stack.toArray(), a)) {
			if(libid.getArtifact()==null || Arrays.equals(stack.toArray(), a))
				libid.setArtifact(new String(Arrays.copyOfRange(ch, start, start+length)));
		}
		else if(Arrays.equals(stack.toArray(), pv) || Arrays.equals(stack.toArray(), v)) {
			if(libid.getVersion()==null || Arrays.equals(stack.toArray(), v))
				libid.setVersion(new String(Arrays.copyOfRange(ch, start, start+length)));
		}
	}

	/** {@inheritDoc} */
	public void endElement(String namespaceURI, String localName, String qName) throws SAXException {
		this.stack.pop();
	}
	
	/**
	 * getLibraryId.
	 *
	 * @return a {@link com.sap.psr.vulas.shared.json.model.LibraryId} object.
	 */
	public LibraryId getLibraryId() {
		return this.libid;
	}
}