com.okworx.ilcd.validation.util.ResourceResolver Maven / Gradle / Ivy

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A Java library for performing technical validation of data in ILCD data format.
There is a newer version: 2.7.2
package com.okworx.ilcd.validation.util;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.net.MalformedURLException;
import java.net.URL;

import org.apache.logging.log4j.Logger;
import org.w3c.dom.ls.LSInput;
import org.w3c.dom.ls.LSResourceResolver;

/**
 * ResourceResolver class.
 *
 * @author oliver.kusche
 * @version $Id: $Id
 */
public class ResourceResolver implements LSResourceResolver {

	protected final Logger log = org.apache.logging.log4j.LogManager.getLogger(this.getClass());

	private String prefix;

	/**
	 * Constructor for ResourceResolver.
	 *
	 * @param prefix a {@link java.lang.String} object.
	 */
	public ResourceResolver(String prefix) {
		log.debug("Setting up resolver, using URL prefix " + prefix);
		this.prefix = prefix;

	}

	/** {@inheritDoc} */
	public LSInput resolveResource(String type, String namespaceURI, String publicId, String systemId, String baseURI) {

		if (log.isTraceEnabled())
			log.trace(systemId + " ### " + baseURI);

		String newSysId = prefix + systemId;

		if (systemId.equals("http://www.w3.org/2001/xml.xsd"))
			newSysId = prefix + "ext/xml.xsd";

		InputStream resourceAsStream;
		try {
			resourceAsStream = new URL(newSysId).openStream();
		} catch (MalformedURLException e) {
			log.error(e);
			return null;
		} catch (IOException e) {
			log.error(e);
			return null;
		}

		return new LSInputImpl(publicId, systemId, resourceAsStream);
	}

	protected class LSInputImpl implements LSInput {

		private String publicId;

		private String systemId;

		public String getPublicId() {
			return publicId;
		}

		public void setPublicId(String publicId) {
			this.publicId = publicId;
		}

		public String getBaseURI() {
			return null;
		}

		public InputStream getByteStream() {
			return null;
		}

		public boolean getCertifiedText() {
			return false;
		}

		public Reader getCharacterStream() {
			return null;
		}

		public String getEncoding() {
			return null;
		}

		public String getStringData() {

			synchronized (inputStream) {
				try {
					byte[] input = new byte[inputStream.available()];
					inputStream.read(input);
					String contents = new String(input);
					return contents;
				} catch (IOException e) {
					log.error(e.getClass().getName() + ": " + e.getMessage());
					log.error("When resolving " + systemId);
					e.printStackTrace();
					return null;
				}
			}
		}

		public void setBaseURI(String baseURI) {
		}

		public void setByteStream(InputStream byteStream) {
		}

		public void setCertifiedText(boolean certifiedText) {
		}

		public void setCharacterStream(Reader characterStream) {
		}

		public void setEncoding(String encoding) {
		}

		public void setStringData(String stringData) {
		}

		public String getSystemId() {
			return systemId;
		}

		public void setSystemId(String systemId) {
			this.systemId = systemId;
		}

		public BufferedInputStream getInputStream() {
			return inputStream;
		}

		public void setInputStream(BufferedInputStream inputStream) {
			this.inputStream = inputStream;
		}

		private BufferedInputStream inputStream;

		public LSInputImpl(String publicId, String sysId, InputStream input) {
			this.publicId = publicId;
			this.systemId = sysId;
			this.inputStream = new BufferedInputStream(input);
		}
	}
}