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package org.custommonkey.xmlunit;

import org.xmlunit.validation.Languages;
import org.xmlunit.validation.ParsingValidator;
import org.xmlunit.validation.ValidationProblem;
import org.xmlunit.validation.ValidationResult;

import org.custommonkey.xmlunit.exceptions.ConfigurationException;
import org.custommonkey.xmlunit.exceptions.XMLUnitRuntimeException;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;

import org.w3c.dom.Document;
import org.xml.sax.InputSource;
import org.xml.sax.helpers.DefaultHandler;

import javax.xml.transform.Source;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stream.StreamSource;

/**
 * Validates XML against its internal or external DOCTYPE, or a completely
 *  different DOCTYPE.
 * Usage:
 * 
    *
  • new Validator(readerForXML);
    * to validate some XML that contains or references an accessible DTD or * schema *
  • *
  • new Validator(readerForXML, systemIdForValidation);
    * to validate some XML that references a DTD but using a local systemId * to perform the validation *
  • *
  • new Validator(readerForXML, systemIdForValidation, doctypeName);
    * to validate some XML against a completely different DTD *
  • *
*/ public class Validator extends DefaultHandler { private final InputSource validationInputSource; private final StringBuilder messages; private final boolean usingDoctypeReader; private final String systemId; private Object schemaSource; private boolean useSchema = false; private Boolean isValid; /** * Baseline constructor: called by all others * * @param inputSource * @param systemId * @param usingDoctypeReader */ protected Validator(InputSource inputSource, String systemId, boolean usingDoctypeReader) { isValid = null; messages = new StringBuilder(); this.validationInputSource = inputSource; this.systemId = systemId; this.usingDoctypeReader = usingDoctypeReader; } /** * DOM-style constructor: allows Document validation post-manipulation * of the DOM tree's contents. * This takes a fairly tortuous route to validation as DOM level 2 does * not allow creation of Doctype nodes. * The supplied systemId and doctype name will replace any Doctype * settings in the Document. * * @param document * @param systemID * @param doctype */ public Validator(Document document, String systemID, String doctype) { this(new InputStreamReader(new NodeInputStream(document)), systemID, doctype); } /** * Basic constructor. * Validates the contents of the Reader using the DTD or schema referenced * by those contents. * * @param readerForValidation */ public Validator(Reader readerForValidation) { this(readerForValidation, null); } /** * Basic constructor. * Validates the contents of the String using the DTD or schema referenced * by those contents. * * @param stringForValidation */ public Validator(String stringForValidation) { this(new StringReader(stringForValidation)); } /** * Basic constructor. * Validates the contents of the InputSource using the DTD or * schema referenced by those contents. * * @param sourceForValidation */ public Validator(InputSource sourceForValidation) { this(sourceForValidation, null); } /** * Extended constructor. * Validates the contents of the Reader using the DTD specified with the * systemID. There must be DOCTYPE instruction in the markup that * references the DTD or else the markup will be considered invalid: if * there is no DOCTYPE in the markup use the 3-argument constructor * * @param readerForValidation * @param systemID */ public Validator(Reader readerForValidation, String systemID) { this(new InputSource(readerForValidation), systemID, readerForValidation instanceof DoctypeReader); } /** * Extended constructor. * Validates the contents of the String using the DTD specified with the * systemID. There must be DOCTYPE instruction in the markup that * references the DTD or else the markup will be considered invalid: if * there is no DOCTYPE in the markup use the 3-argument constructor * * @param stringForValidation * @param systemID */ public Validator(String stringForValidation, String systemID) { this(new StringReader(stringForValidation), systemID); } /** * Extended constructor. * Validates the contents of the InputSource using the DTD * specified with the systemID. There must be DOCTYPE instruction * in the markup that references the DTD or else the markup will * be considered invalid: if there is no DOCTYPE in the markup use * the 3-argument constructor * * @param sourceForValidation * @param systemID */ public Validator(InputSource sourceForValidation, String systemID) { this(sourceForValidation, systemID, false); } /** * Full constructor. * Validates the contents of the InputSource using the DTD * specified with the systemID and named with the doctype name. * * @param sourceForValidation * @param systemID * @param doctype */ public Validator(InputSource sourceForValidation, String systemID, String doctype) { this(sourceForValidation.getCharacterStream() != null ? new InputSource(new DoctypeReader(sourceForValidation .getCharacterStream(), doctype, systemID)) : new InputSource(new DoctypeInputStream(sourceForValidation .getByteStream(), sourceForValidation .getEncoding(), doctype, systemID)), systemID, true); } /** * Full constructor. * Validates the contents of the Reader using the DTD specified with the * systemID and named with the doctype name. * * @param readerForValidation * @param systemID * @param doctype */ public Validator(Reader readerForValidation, String systemID, String doctype) { this(readerForValidation instanceof DoctypeReader ? readerForValidation : new DoctypeReader(readerForValidation, doctype, systemID), systemID); } /** * Turn on XML Schema validation. * *

This feature should work with any XML parser that is JAXP * 1.2 compliant and supports XML Schema validation.

* *

For a fully JAXP 1.2 compliant parser the property {@link * JAXPConstants.Properties#SCHEMA_LANGUAGE * http://java.sun.com/xml/jaxp/properties/schemaLanguage} is set, * if this fails the method falls back to the features * http://apache.org/xml/features/validation/schema & * http://apache.org/xml/features/validation/dynamic which should * cover early versions of Xerces 2 as well.

* * @param use indicate that XML Schema should be used to validate * documents. * @see #setJAXP12SchemaSource(Object) */ public void useXMLSchema(boolean use) { useSchema = use; } /** * Perform the validation of the source against DTD / Schema. * * @return true if the input supplied to the constructor passes validation, * false otherwise */ public boolean isValid() { validate(); return isValid.booleanValue(); } /** * Assert that a document is valid. */ public void assertIsValid(){ if(!isValid()){ junit.framework.Assert.fail(messages.toString()); } } /** * Append any validation message(s) to the specified StringBuffer. * * @param toAppendTo * @return specified StringBuffer with message(s) appended */ private StringBuilder appendMessage(StringBuilder toAppendTo) { if (isValid()) { return toAppendTo.append("[valid]"); } return toAppendTo.append(messages); } /** * @return class name appended with validation messages */ public String toString() { StringBuilder builder = new StringBuilder(super.toString()).append(':'); return appendMessage(builder).toString(); } /** * Actually perform validation. */ private void validate() { if (isValid != null) { return; } ParsingValidator v = new ParsingValidator(useSchema ? Languages.W3C_XML_SCHEMA_NS_URI : Languages.XML_DTD_NS_URI); List schemaSourceList = new ArrayList(); if (systemId != null) { schemaSourceList.add(new StreamSource(systemId)); } addSchemaSources(schemaSource, schemaSourceList); v.setSchemaSources(schemaSourceList.toArray(new Source[0])); try { ValidationResult r = v.validateInstance(new SAXSource(validationInputSource)); isValid = r.isValid() ? Boolean.TRUE : Boolean.FALSE; for (ValidationProblem p : r.getProblems()) { validationProblem(p); } } catch (org.xmlunit.ConfigurationException e) { throw new ConfigurationException(e.getCause()); } catch (org.xmlunit.XMLUnitException e) { throw new XMLUnitRuntimeException(e.getMessage(), e.getCause()); } if (usingDoctypeReader && isValid == Boolean.FALSE) { try { messages.append("\nContent was: ") .append(getOriginalContent(validationInputSource)); } catch (IOException e) { // silent but deadly? } } } private void validationProblem(ValidationProblem p) { String msg = "At line " + p.getLine() + ", column: " + p.getColumn() + " ==> " + p.getMessage(); if (!msg.endsWith("\n")) { msg += "\n"; } invalidate(msg); } /** * Set the validation status flag to false and capture the message for use * later. * * @param message */ private void invalidate(String message) { isValid = Boolean.FALSE; messages.append(message).append(' '); } /** * As per JAXP 1.2 changes, which introduced a standard way for parsers to * support schema validation. Since only W3C Schema support was included in * JAXP 1.2, this is the only mechanism currently supported by this method. * * @param schemaSource * This can be one of the following: *
    *
  • String that points to the URI of the schema
  • *
  • InputStream with the contents of the schema
  • *
  • SAX InputSource
  • *
  • File
  • *
  • an array of Objects with the contents being one of the * types defined above. An array of Objects can be used only when * the schema language has the ability to assemble a schema at * runtime. When an array of Objects is passed it is illegal to * have two schemas that share the same namespace.
  • *
* @see "http://java.sun.com/webservices/jaxp/change-requests-11.html" */ public void setJAXP12SchemaSource(Object schemaSource) { this.schemaSource = schemaSource; } private static void addSchemaSources(Object schemaSources, List targetList) { if (schemaSources instanceof String) { targetList.add(new StreamSource((String) schemaSources)); } else if (schemaSources instanceof File) { targetList.add(new StreamSource((File) schemaSources)); } else if (schemaSources instanceof InputStream) { targetList.add(new StreamSource((InputStream) schemaSources)); } else if (schemaSources instanceof InputSource) { targetList.add(new SAXSource((InputSource) schemaSources)); } else if (schemaSources instanceof Object[]) { for (Object s : (Object[]) schemaSources) { addSchemaSources(s, targetList); } } else if (schemaSources != null) { throw new XMLUnitRuntimeException("Unknown schema source type: " + schemaSources.getClass()); } } private static String getOriginalContent(InputSource s) throws IOException { return s.getCharacterStream() instanceof DoctypeReader ? ((DoctypeReader) s.getCharacterStream()).getContent() : ((DoctypeInputStream) s.getByteStream()) .getContent(s.getEncoding()); } }




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