Support file-relative XInclude href's

sbe-tool/src/main/java/uk/co/real_logic/sbe/SbeTool.java

@@ -32,7 +32,9 @@
 import java.io.File;
 import java.io.InputStream;
 import java.nio.file.Files;
+import java.nio.file.Path;
 import java.nio.file.Paths;
+import org.xml.sax.InputSource;
 
 /**
  * A tool for running the SBE parser, validator, and code generator.
@@ -281,9 +283,16 @@ public static MessageSchema parseSchema(final String sbeSchemaFilename)
             .warningsFatal(Boolean.parseBoolean(System.getProperty(VALIDATION_WARNINGS_FATAL)))
             .suppressOutput(Boolean.parseBoolean(System.getProperty(VALIDATION_SUPPRESS_OUTPUT)));
 
-        try (InputStream in = new BufferedInputStream(Files.newInputStream(Paths.get(sbeSchemaFilename))))
+        final Path filePath = Paths.get(sbeSchemaFilename);
+        try (InputStream in = new BufferedInputStream(Files.newInputStream(filePath)))
         {
-            return XmlSchemaParser.parse(in, optionsBuilder.build());
+            final InputSource inputSource = new InputSource(in);
+            final Path parentPath = filePath.toAbsolutePath().getParent();
+            if (parentPath != null)
+            {
+                inputSource.setSystemId(filePath.toUri().toString());
+            }
+            return XmlSchemaParser.parse(inputSource, optionsBuilder.build());
         }
     }
 

sbe-tool/src/main/java/uk/co/real_logic/sbe/xml/XmlSchemaParser.java

@@ -34,6 +34,7 @@
 import java.nio.ByteOrder;
 import java.util.HashMap;
 import java.util.Map;
+import org.xml.sax.InputSource;
 
 import static uk.co.real_logic.sbe.PrimitiveType.*;
 import static uk.co.real_logic.sbe.xml.Presence.REQUIRED;
@@ -94,16 +95,16 @@ public static void validate(final String xsdFilename, final InputStream in, fina
     }
 
     /**
-     * Take an {@link InputStream} and parse it generating map of template ID to Message objects, types, and schema.
+     * Take an {@link InputSource} and parse it generating map of template ID to Message objects, types, and schema.
      * <p>
      * Exceptions are passed back up for any problems.
      *
-     * @param in      stream from which schema is read.
+     * @param is      inputSource from which schema is read. Ideally it will have the systemId property set to resolve relative references
      * @param options to be applied during parsing.
      * @return {@link MessageSchema} encoding for the schema.
      * @throws Exception on parsing error.
      */
-    public static MessageSchema parse(final InputStream in, final ParserOptions options) throws Exception
+    public static MessageSchema parse(final InputSource is, final ParserOptions options) throws Exception
     {
         final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
 
@@ -114,7 +115,7 @@ public static MessageSchema parse(final InputStream in, final ParserOptions opti
             factory.setFeature("http://apache.org/xml/features/xinclude/fixup-base-uris", false);
         }
 
-        final Document document = factory.newDocumentBuilder().parse(in);
+        final Document document = factory.newDocumentBuilder().parse(is);
         final XPath xPath = XPathFactory.newInstance().newXPath();
 
         final ErrorHandler errorHandler = new ErrorHandler(options);
@@ -133,6 +134,25 @@ public static MessageSchema parse(final InputStream in, final ParserOptions opti
         return messageSchema;
     }
 
+    /**
+     * Wraps an {@link InputStream} into an {@link InputSource} and delegates to
+     * {@link #parse(org.xml.sax.InputSource, uk.co.real_logic.sbe.xml.ParserOptions) }.
+     * <p>Note: this method does not the the {@link InputSource#setSystemId(java.lang.String) } property, however. It is recommended to use the
+     * {@link #parse(org.xml.sax.InputSource, uk.co.real_logic.sbe.xml.ParserOptions) } method directly.</p>
+     *
+     * <p>
+     * Exceptions are passed back up for any problems.
+     *
+     * @param in      stream from which schema is read.
+     * @param options to be applied during parsing.
+     * @return {@link MessageSchema} encoding for the schema.
+     * @throws Exception on parsing error.
+     */
+    public static MessageSchema parse(final InputStream in, final ParserOptions options) throws Exception
+    {
+        return parse(new InputSource(in), options);
+    }
+
     /**
      * Scan XML for all types (encodedDataType, compositeType, enumType, and setType) and save in map
      *

sbe-tool/src/test/java/uk/co/real_logic/sbe/xml/RelativeXIncludeTest.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2013-2019 Real Logic Ltd.
+ *
+ * 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.
+ */
+package uk.co.real_logic.sbe.xml;
+
+import java.io.File;
+import java.io.InputStream;
+import java.net.URL;
+
+import org.junit.Test;
+
+import org.xml.sax.InputSource;
+import static uk.co.real_logic.sbe.xml.XmlSchemaParser.parse;
+
+public class RelativeXIncludeTest
+{
+    @Test
+    public void shouldParseFileInSubDir()
+        throws Exception
+    {
+        final ClassLoader classLoader = getClass().getClassLoader();
+        final URL testResource = classLoader.getResource("sub/basic-schema.xml");
+        final InputStream inStream = testResource.openStream();
+        final InputSource is = new InputSource(inStream);
+
+        final File file = new File(testResource.getFile());
+        is.setSystemId(file.toPath().toAbsolutePath().getParent().toUri().toString());
+        parse(is, ParserOptions.DEFAULT);
+    }
+
+}

sbe-tool/src/test/resources/sub/basic-schema.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<messageSchema package="SBE tests"
+               id="2"
+               xmlns:xi="http://www.w3.org/2001/XInclude"
+               semanticVersion="5.2"
+               description="Unit Test"
+               byteOrder="littleEndian">
+    <xi:include href='sub2/common.xml'/>
+    <message name="TestMessage50001" id="50001" description="TestMessage" blockLength="16">
+        <field name="Tag40001" id="40001" type="uint32" semanticType="int"/>
+    </message>
+</messageSchema>

sbe-tool/src/test/resources/sub/sub2/common.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<types>
+    <type name="Symbol" description="Symbol" length="20" primitiveType="char" semanticType="char"/>
+    <composite name="messageHeader" description="Message identifiers and length of message root">
+        <type name="blockLength" primitiveType="uint16"/>
+        <type name="templateId" primitiveType="uint16"/>
+        <type name="schemaId" primitiveType="uint16"/>
+        <type name="version" primitiveType="uint16"/>
+    </composite>
+</types>