Add getAttribute(final byte tag) to RecordComponentInfo (#494)

* Add getAttribute(final byte tag) to RecordComponentInfo

* fix checkstyle issues

* Make a separate record test testRecordComponentGetAttribute

* Javadoc

---------

Co-authored-by: nbauma109 <nbauma109@github.com>
Co-authored-by: Gary Gregory <garydgregory@users.noreply.github.com>

Author: 3 people

src/main/java/org/apache/bcel/classfile/RecordComponentInfo.java

@@ -77,6 +77,25 @@ public void dump(final DataOutputStream file) throws IOException {
         }
     }
 
+    /**
+     * Gets the attribute for the given tag if present, or null if absent.
+     *
+     * @param <T> the attribute type.
+     * @param tag the attribute tag.
+     * @return Attribute for given tag, null if not found.
+     * Refer to {@link org.apache.bcel.Const#ATTR_UNKNOWN} constants named ATTR_* for possible values.
+     * @since 6.13.0
+     */
+    @SuppressWarnings("unchecked")
+    public final <T extends Attribute> T getAttribute(final byte tag) {
+        for (final Attribute attribute : getAttributes()) {
+            if (attribute.getTag() == tag) {
+                return (T) attribute;
+            }
+        }
+        return null;
+    }
+
     /**
      * Gets all attributes.
      *

src/test/java/org/apache/bcel/classfile/RecordTest.java

@@ -21,12 +21,14 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.io.File;
 import java.io.IOException;
 
 import org.apache.bcel.AbstractTest;
+import org.apache.bcel.Const;
 import org.apache.bcel.util.SyntheticRepository;
 import org.apache.bcel.visitors.CountingVisitor;
 import org.junit.jupiter.api.Test;
@@ -118,4 +120,14 @@ void testRecordToString() throws ClassNotFoundException, ClassFormatException, I
         assertEquals("RecordComponentInfo(aNumber,I,0):", firstComponent.toString());
     }
 
+    @Test
+    void testRecordComponentGetAttribute() throws ClassFormatException, IOException {
+        final JavaClass clazz = new ClassParser("src/test/resources/record/SimpleRecord.class").parse();
+        final Record recordAttribute = (Record) findAttribute("Record", clazz)[0];
+        final RecordComponentInfo secondComponent = recordAttribute.getComponents()[1];
+        final RuntimeVisibleAnnotations ann = secondComponent.getAttribute(Const.ATTR_RUNTIME_VISIBLE_ANNOTATIONS);
+        assertEquals("RuntimeVisibleAnnotations:\n"
+                + "  @Ljavax/annotation/Nonnull;", ann.toString());
+        assertNull(secondComponent.getAttribute(Const.ATTR_RUNTIME_INVISIBLE_ANNOTATIONS));
+    }
 }