DocumentFactModelExtractorImpl.java

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package gov.samhsa.acs.documentsegmentation.tools;

import gov.samhsa.acs.common.tool.XmlTransformer;
import gov.samhsa.acs.common.util.StringURIResolver;

import java.util.Optional;

import javax.xml.transform.URIResolver;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * The Class DocumentFactModelExtractorImpl.
 */
public class DocumentFactModelExtractorImpl implements
		DocumentFactModelExtractor {

	/** The Constant EXTRACT_CLINICAL_FACTS_XSL. */
	private static final String EXTRACT_CLINICAL_FACTS_XSL = "extractClinicalFacts.xsl";

	/** The Constant PARAM_XACML_RESULT. */
	private static final String PARAM_XACML_RESULT = "xacmlResult";

	/** The logger. */
	private final Logger logger = LoggerFactory.getLogger(this.getClass());

	/** The xml transformer. */
	private final XmlTransformer xmlTransformer;

	/**
	 * Instantiates a new document fact model extractor impl.
	 *
	 * @param xmlTransformer
	 *            the xml transformer
	 */
	public DocumentFactModelExtractorImpl(XmlTransformer xmlTransformer) {
		super();
		this.xmlTransformer = xmlTransformer;
	}

	/*
	 * (non-Javadoc)
	 *
	 * @see gov.samhsa.acs.documentsegmentation.tools
	 * .DocumentFactModelExtractor#extractFactModel(java.lang.String,
	 * java.lang.String)
	 */
	@Override
	public String extractFactModel(String document, String enforcementPolicies) {

		final String xslUrl = Thread.currentThread().getContextClassLoader()
				.getResource(EXTRACT_CLINICAL_FACTS_XSL).toString();
		final String xacmlResult = enforcementPolicies.replace("<xacmlReslt>",
				"<xacmlReslt xmlns:\"urn:hl7-org:v3\">");
		final Optional<URIResolver> uriResolver = Optional
				.of(new StringURIResolver()
						.put(PARAM_XACML_RESULT, xacmlResult));
		String factModel = xmlTransformer.transform(document, xslUrl,
				Optional.empty(), uriResolver);

		factModel = factModel
				.replace(
						"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>",
						"");
		logger.debug("FactModel:");
		logger.debug(factModel);
		return factModel;
	}
}