MLE-26427 Added unhappy test cases for exclusions

Author: rjrudin

marklogic-client-api/src/main/java/com/marklogic/client/datamovement/filter/IncrementalWriteFilter.java

@@ -3,11 +3,13 @@
  */
 package com.marklogic.client.datamovement.filter;
 
+import com.fasterxml.jackson.core.JsonPointer;
 import com.marklogic.client.datamovement.DocumentWriteSetFilter;
 import com.marklogic.client.document.DocumentWriteOperation;
 import com.marklogic.client.document.DocumentWriteSet;
 import com.marklogic.client.impl.DocumentWriteOperationImpl;
 import com.marklogic.client.impl.HandleAccessor;
+import com.marklogic.client.impl.XmlFactories;
 import com.marklogic.client.io.BaseHandle;
 import com.marklogic.client.io.DocumentMetadataHandle;
 import com.marklogic.client.io.Format;
@@ -16,6 +18,8 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import javax.xml.xpath.XPath;
+import javax.xml.xpath.XPathExpressionException;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.time.Instant;
@@ -114,11 +118,53 @@ public Builder xmlExclusions(String... xpathExpressions) {
 		}
 
 		public IncrementalWriteFilter build() {
+			validateJsonExclusions();
+			validateXmlExclusions();
 			if (useEvalQuery) {
 				return new IncrementalWriteEvalFilter(hashKeyName, timestampKeyName, canonicalizeJson, skippedDocumentsConsumer, jsonExclusions, xmlExclusions);
 			}
 			return new IncrementalWriteOpticFilter(hashKeyName, timestampKeyName, canonicalizeJson, skippedDocumentsConsumer, jsonExclusions, xmlExclusions);
 		}
+
+		private void validateJsonExclusions() {
+			if (jsonExclusions == null) {
+				return;
+			}
+			for (String jsonPointer : jsonExclusions) {
+				if (jsonPointer == null || jsonPointer.trim().isEmpty()) {
+					throw new IllegalArgumentException(
+						"Empty JSON Pointer expression is not valid for excluding content from incremental write hash calculation; " +
+							"it would exclude the entire document. JSON Pointer expressions must start with '/'.");
+				}
+				try {
+					JsonPointer.compile(jsonPointer);
+				} catch (IllegalArgumentException e) {
+					throw new IllegalArgumentException(
+						String.format("Invalid JSON Pointer expression '%s' for excluding content from incremental write hash calculation. " +
+							"JSON Pointer expressions must start with '/'; cause: %s", jsonPointer, e.getMessage()), e);
+				}
+			}
+		}
+
+		private void validateXmlExclusions() {
+			if (xmlExclusions == null) {
+				return;
+			}
+			XPath xpath = XmlFactories.getXPathFactory().newXPath();
+			for (String xpathExpression : xmlExclusions) {
+				if (xpathExpression == null || xpathExpression.trim().isEmpty()) {
+					throw new IllegalArgumentException(
+						"Empty XPath expression is not valid for excluding content from incremental write hash calculation.");
+				}
+				try {
+					xpath.compile(xpathExpression);
+				} catch (XPathExpressionException e) {
+					throw new IllegalArgumentException(
+						String.format("Invalid XPath expression '%s' for excluding content from incremental write hash calculation; cause: %s",
+							xpathExpression, e.getMessage()), e);
+				}
+			}
+		}
 	}
 
 	protected final String hashKeyName;

marklogic-client-api/src/test/java/com/marklogic/client/datamovement/filter/ApplyExclusionsToIncrementalWriteTest.java

@@ -139,4 +139,44 @@ void xmlExclusions() {
 		assertEquals(10, writtenCount.get(), "Documents should be written since non-excluded content changed");
 		assertEquals(5, skippedCount.get(), "Skip count should remain at 5");
 	}
+
+	/**
+	 * Verifies that JSON Pointer exclusions are only applied to JSON documents and are ignored for XML documents.
+	 * The XML document should use its full content for hashing since no XML exclusions are configured.
+	 */
+	@Test
+	void jsonExclusionsIgnoredForXmlDocuments() {
+		filter = IncrementalWriteFilter.newBuilder()
+			.jsonExclusions("/timestamp")
+			.onDocumentsSkipped(docs -> skippedCount.addAndGet(docs.length))
+			.build();
+
+		// Write one JSON doc and one XML doc
+		docs = new ArrayList<>();
+		ObjectNode jsonDoc = objectMapper.createObjectNode();
+		jsonDoc.put("id", 1);
+		jsonDoc.put("timestamp", "2025-01-01T10:00:00Z");
+		docs.add(new DocumentWriteOperationImpl("/incremental/test/mixed-doc.json", METADATA, new JacksonHandle(jsonDoc)));
+
+		String xmlDoc = "<doc><id>1</id><timestamp>2025-01-01T10:00:00Z</timestamp></doc>";
+		docs.add(new DocumentWriteOperationImpl("/incremental/test/mixed-doc.xml", METADATA, new StringHandle(xmlDoc).withFormat(Format.XML)));
+
+		writeDocs(docs);
+		assertEquals(2, writtenCount.get());
+		assertEquals(0, skippedCount.get());
+
+		// Write again with different timestamp values
+		docs = new ArrayList<>();
+		jsonDoc = objectMapper.createObjectNode();
+		jsonDoc.put("id", 1);
+		jsonDoc.put("timestamp", "2026-01-02T15:30:00Z"); // Changed
+		docs.add(new DocumentWriteOperationImpl("/incremental/test/mixed-doc.json", METADATA, new JacksonHandle(jsonDoc)));
+
+		xmlDoc = "<doc><id>1</id><timestamp>2026-01-02T15:30:00Z</timestamp></doc>"; // Changed
+		docs.add(new DocumentWriteOperationImpl("/incremental/test/mixed-doc.xml", METADATA, new StringHandle(xmlDoc).withFormat(Format.XML)));
+
+		writeDocs(docs);
+		assertEquals(3, writtenCount.get(), "XML doc should be written since its timestamp changed and no XML exclusions are configured");
+		assertEquals(1, skippedCount.get(), "JSON doc should be skipped since only the excluded timestamp field changed");
+	}
 }

marklogic-client-api/src/test/java/com/marklogic/client/datamovement/filter/ApplyInvalidExclusionsToIncrementalWriteTest.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2010-2026 Progress Software Corporation and/or its subsidiaries or affiliates. All Rights Reserved.
+ */
+package com.marklogic.client.datamovement.filter;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class ApplyInvalidExclusionsToIncrementalWriteTest extends AbstractIncrementalWriteTest {
+
+	/**
+	 * Verifies that an invalid JSON Pointer expression (missing leading slash) causes the build to fail
+	 * immediately, allowing the user to fix the configuration before any documents are processed.
+	 */
+	@Test
+	void invalidJsonPointerExpression() {
+		IncrementalWriteFilter.Builder builder = IncrementalWriteFilter.newBuilder()
+			.jsonExclusions("timestamp"); // Invalid - missing leading slash
+
+		IllegalArgumentException ex = assertThrows(IllegalArgumentException.class, builder::build);
+
+		assertTrue(ex.getMessage().contains("Invalid JSON Pointer expression 'timestamp'"),
+			"Error message should include the invalid expression. Actual: " + ex.getMessage());
+		assertTrue(ex.getMessage().contains("incremental write"),
+			"Error message should mention incremental write context. Actual: " + ex.getMessage());
+		assertTrue(ex.getMessage().contains("must start with '/'"),
+			"Error message should hint at the fix. Actual: " + ex.getMessage());
+	}
+
+	/**
+	 * Verifies that an empty JSON Pointer expression is rejected since it would exclude the entire document,
+	 * leaving nothing to hash.
+	 */
+	@Test
+	void emptyJsonPointerExpression() {
+		IncrementalWriteFilter.Builder builder = IncrementalWriteFilter.newBuilder()
+			.jsonExclusions(""); // Invalid - would exclude entire document
+
+		IllegalArgumentException ex = assertThrows(IllegalArgumentException.class, builder::build);
+
+		assertTrue(ex.getMessage().contains("Empty JSON Pointer expression"),
+			"Error message should indicate empty expression. Actual: " + ex.getMessage());
+		assertTrue(ex.getMessage().contains("would exclude the entire document"),
+			"Error message should explain why it's invalid. Actual: " + ex.getMessage());
+	}
+
+	/**
+	 * Verifies that an invalid XPath expression causes the build to fail immediately,
+	 * allowing the user to fix the configuration before any documents are processed.
+	 */
+	@Test
+	void invalidXPathExpression() {
+		IncrementalWriteFilter.Builder builder = IncrementalWriteFilter.newBuilder()
+			.xmlExclusions("[[[invalid xpath"); // Invalid XPath syntax
+
+		IllegalArgumentException ex = assertThrows(IllegalArgumentException.class, builder::build);
+
+		assertTrue(ex.getMessage().contains("Invalid XPath expression '[[[invalid xpath'"),
+			"Error message should include the invalid expression. Actual: " + ex.getMessage());
+		assertTrue(ex.getMessage().contains("incremental write"),
+			"Error message should mention incremental write context. Actual: " + ex.getMessage());
+	}
+
+}