make array into immutable collection (spotbugs issue)

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1893861 13f79535-47bb-0310-9956-ffa450edef68

3 files changed, 24 insertions, 12 deletions

diff --git a/poi-ooxml/src/main/java/org/apache/poi/ooxml/extractor/POIXMLExtractorFactory.java b/poi-ooxml/src/main/java/org/apache/poi/ooxml/extractor/POIXMLExtractorFactory.java
index 8cad08609d..124a2818ed 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/ooxml/extractor/POIXMLExtractorFactory.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/ooxml/extractor/POIXMLExtractorFactory.java
@@ -21,6 +21,9 @@ import static org.apache.poi.extractor.ExtractorFactory.OOXML_PACKAGE;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
 
 import org.apache.poi.extractor.ExtractorFactory;
 import org.apache.poi.extractor.ExtractorProvider;
@@ -65,11 +68,13 @@ public final class POIXMLExtractorFactory implements ExtractorProvider {
     private static final String VISIO_DOCUMENT_REL = PackageRelationshipTypes.VISIO_CORE_DOCUMENT;
     private static final String STRICT_DOCUMENT_REL = PackageRelationshipTypes.STRICT_CORE_DOCUMENT;
 
-    private static final XSLFRelation[] SUPPORTED_XSLF_TYPES = new XSLFRelation[]{
-        XSLFRelation.MAIN, XSLFRelation.MACRO, XSLFRelation.MACRO_TEMPLATE,
-        XSLFRelation.PRESENTATIONML, XSLFRelation.PRESENTATIONML_TEMPLATE,
-        XSLFRelation.PRESENTATION_MACRO
-    };
+    private static final List<XSLFRelation> SUPPORTED_XSLF_TYPES = Collections.unmodifiableList(
+            Arrays.asList(
+                    XSLFRelation.MAIN, XSLFRelation.MACRO, XSLFRelation.MACRO_TEMPLATE,
+                    XSLFRelation.PRESENTATIONML, XSLFRelation.PRESENTATIONML_TEMPLATE,
+                    XSLFRelation.PRESENTATION_MACRO
+            )
+    );
 
     @Override
     public boolean accepts(FileMagic fm) {
diff --git a/poi-ooxml/src/main/java/org/apache/poi/xssf/extractor/XSSFBEventBasedExcelExtractor.java b/poi-ooxml/src/main/java/org/apache/poi/xssf/extractor/XSSFBEventBasedExcelExtractor.java
index 817ed64a1e..a4c56db4cd 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/xssf/extractor/XSSFBEventBasedExcelExtractor.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/xssf/extractor/XSSFBEventBasedExcelExtractor.java
@@ -18,6 +18,8 @@ package org.apache.poi.xssf.extractor;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.Collections;
+import java.util.List;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -46,9 +48,9 @@ public class XSSFBEventBasedExcelExtractor extends XSSFEventBasedExcelExtractor
 
     private static final Logger LOGGER = LogManager.getLogger(XSSFBEventBasedExcelExtractor.class);
 
-    public static final XSSFRelation[] SUPPORTED_TYPES = new XSSFRelation[]{
+    public static final List<XSSFRelation> SUPPORTED_TYPES = Collections.singletonList(
             XSSFRelation.XLSB_BINARY_WORKBOOK
-    };
+    );
 
     private boolean handleHyperlinksInCells;
 
diff --git a/poi-ooxml/src/main/java/org/apache/poi/xwpf/extractor/XWPFWordExtractor.java b/poi-ooxml/src/main/java/org/apache/poi/xwpf/extractor/XWPFWordExtractor.java
index 578d6f2828..0673aee02d 100644
--- a/poi-ooxml/src/main/java/org/apache/poi/xwpf/extractor/XWPFWordExtractor.java
+++ b/poi-ooxml/src/main/java/org/apache/poi/xwpf/extractor/XWPFWordExtractor.java
@@ -17,6 +17,8 @@
 package org.apache.poi.xwpf.extractor;
 
 import java.io.IOException;
+import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 
 import org.apache.poi.ooxml.extractor.POIXMLTextExtractor;
@@ -43,11 +45,14 @@ import org.openxmlformats.schemas.wordprocessingml.x2006.main.CTSectPr;
  * Helper class to extract text from an OOXML Word file
  */
 public class XWPFWordExtractor implements POIXMLTextExtractor {
-    public static final XWPFRelation[] SUPPORTED_TYPES = {
-            XWPFRelation.DOCUMENT, XWPFRelation.TEMPLATE,
-            XWPFRelation.MACRO_DOCUMENT,
-            XWPFRelation.MACRO_TEMPLATE_DOCUMENT
-    };
+    public static final List<XWPFRelation> SUPPORTED_TYPES = Collections.unmodifiableList(
+            Arrays.asList(
+                    XWPFRelation.DOCUMENT,
+                    XWPFRelation.TEMPLATE,
+                    XWPFRelation.MACRO_DOCUMENT,
+                    XWPFRelation.MACRO_TEMPLATE_DOCUMENT
+            )
+    );
 
     private final XWPFDocument document;
     private boolean fetchHyperlinks;