Support CharSequence queries

Author: mcculls

class-match/src/main/java/datadog/instrument/classmatch/ClassInfoCache.java

@@ -57,7 +57,7 @@ public ClassInfoCache(int capacity) {
    * @param className the class-name
    * @return information shared under the class-name
    */
-  public T find(String className) {
+  public T find(CharSequence className) {
     return find(className, ALL_CLASS_LOADERS);
   }
 
@@ -78,7 +78,7 @@ public void share(String className, T info) {
    * @param cl the class-loader
    * @return information shared under the class-name and class-loader
    */
-  public T find(String className, ClassLoader cl) {
+  public T find(CharSequence className, ClassLoader cl) {
     return find(className, ClassLoaderIndex.getClassLoaderKeyId(cl));
   }
 
@@ -102,7 +102,7 @@ public void share(String className, T info, ClassLoader cl) {
    * @see ClassLoaderIndex#getClassLoaderKeyId(ClassLoader)
    */
   @SuppressWarnings("unchecked")
-  public T find(String className, int classLoaderKeyId) {
+  public T find(CharSequence className, int classLoaderKeyId) {
     final int hash = className.hashCode();
     final SharedInfo[] shared = this.shared;
     final int slotMask = this.slotMask;
@@ -112,7 +112,7 @@ public T find(String className, int classLoaderKeyId) {
       int slot = slotMask & h;
       SharedInfo existing = shared[slot];
       if (existing != null) {
-        if (className.equals(existing.className)) {
+        if (existing.className.contentEquals(className)) {
           // filter on class-loader, -1 on either side matches all
           if ((classLoaderKeyId ^ existing.classLoaderKeyId) <= 0) {
             // use global TICKS as a substitute for access time

class-match/src/main/java/datadog/instrument/classmatch/ClassNameFilter.java

@@ -49,7 +49,7 @@ public ClassNameFilter(int capacity) {
    * @param className the class-name to test
    * @return {@code true} if the class-name is in the filter; otherwise {@code false}
    */
-  public boolean contains(String className) {
+  public boolean contains(CharSequence className) {
     final int hash = className.hashCode();
     final long[] members = this.members;
     final int slotMask = this.slotMask;
@@ -120,7 +120,7 @@ private static int classCode(String className) {
   }
 
   /** Checks whether the 32-bit 'class-code' is consistent with the fully-qualified class-name. */
-  private static boolean checkClassCode(String className, int code) {
+  private static boolean checkClassCode(CharSequence className, int code) {
     int start = (0xFF & code);
     int end = className.length() - 1;
     return end - start == (0xFF & (code >> 8))