lessen the cost of hashcode and equals

weaver/src/org/aspectj/weaver/patterns/NamePattern.java

@@ -21,6 +21,7 @@ import org.aspectj.weaver.VersionedDataInputStream;
 public class NamePattern extends PatternNode {
 	char[] pattern;
 	int starCount = 0;
+	private int hashcode = -1;
 
 	public static final NamePattern ELLIPSIS = new NamePattern("");
 	public static final NamePattern ANY = new NamePattern("*");
@@ -35,6 +36,7 @@ public class NamePattern extends PatternNode {
 		for (int i=0, len=pattern.length; i<len; i++) {
 			if (pattern[i] == '*') starCount++;
 		}
+		hashcode = new String(pattern).hashCode();
 	}
 	
 	public boolean matches(char[] a2) {
@@ -122,13 +124,18 @@ public class NamePattern extends PatternNode {
 	public boolean equals(Object other) {
 		if (other instanceof NamePattern) {
 			NamePattern otherPat = (NamePattern)other;
-			return otherPat.starCount == this.starCount &&
-			     new String(otherPat.pattern).equals(new String(this.pattern));
+			if (otherPat.starCount!=this.starCount) return false;
+			if (otherPat.pattern.length!=this.pattern.length) return false;
+			for (int i = 0; i < this.pattern.length; i++) {
+				if (this.pattern[i]!=otherPat.pattern[i]) return false;			
+			}
+			return true;
 		}
 		return false;
 	}
+	
     public int hashCode() {
-        return new String(pattern).hashCode();
+    	return hashcode;
     }
     
     

weaver/src/org/aspectj/weaver/patterns/SignaturePattern.java

@@ -55,6 +55,7 @@ public class SignaturePattern extends PatternNode {
     private TypePatternList parameterTypes;
     private ThrowsPattern throwsPattern;
     private AnnotationTypePattern annotationPattern;
+    private transient int hashcode = -1;
     	
 	public SignaturePattern(Member.Kind kind, ModifiersPattern modifiers,
 	                         TypePattern returnType, TypePattern declaringType,
@@ -96,7 +97,7 @@ public class SignaturePattern extends PatternNode {
 			annotationPattern = annotationPattern.resolveBindings(scope,bindings,false);
 			checkForIncorrectTargetKind(annotationPattern,scope,true);
 		}
-		
+		hashcode =-1;
     	return this;
     }
     
@@ -629,16 +630,18 @@ public class SignaturePattern extends PatternNode {
 			&& o.annotationPattern.equals(this.annotationPattern);
     }
     public int hashCode() {
-        int result = 17;
-        result = 37*result + kind.hashCode();
-        result = 37*result + modifiers.hashCode();
-        result = 37*result + returnType.hashCode();
-        result = 37*result + declaringType.hashCode();
-        result = 37*result + name.hashCode();
-        result = 37*result + parameterTypes.hashCode();
-        result = 37*result + throwsPattern.hashCode();
-        result = 37*result + annotationPattern.hashCode();
-        return result;
+    	if (hashcode==-1) {
+          hashcode = 17;
+          hashcode = 37*hashcode + kind.hashCode();
+          hashcode = 37*hashcode + modifiers.hashCode();
+          hashcode = 37*hashcode + returnType.hashCode();
+          hashcode = 37*hashcode + declaringType.hashCode();
+          hashcode = 37*hashcode + name.hashCode();
+          hashcode = 37*hashcode + parameterTypes.hashCode();
+          hashcode = 37*hashcode + throwsPattern.hashCode();
+          hashcode = 37*hashcode + annotationPattern.hashCode();
+    	}
+        return hashcode;
     }
     
 	public void write(DataOutputStream s) throws IOException {