moved Util class to domain.common and use its Pair/Triple utility classes also in gwt.ui

2026-09-25 06:58:39 +00:00 · 2011-12-30 09:49:02 +01:00
parent 5983eb2cf8
commit 9e388831e3
82 changed files with 111 additions and 267 deletions
@@ -0,0 +1,215 @@
+package com.sap.sailing.domain.common;
+
+import java.io.Serializable;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.List;
+
+public class Util {
+    public static <T> int size(Iterable<T> i) {
+        if (i instanceof Collection<?>) {
+            return ((Collection<?>) i).size();
+        } else {
+            int result = 0;
+            Iterator<T> iter = i.iterator();
+            while (iter.hasNext()) {
+                result++;
+                iter.next();
+            }
+            return result;
+        }
+    }
+    
+    public static <T> T get(Iterable<T> iterable, int i) {
+        if (iterable instanceof List<?>) {
+            List<T> l = (List<T>) iterable;
+            return l.get(i);
+        } else {
+            Iterator<T> iter = iterable.iterator();
+            T result = iter.next();
+            for (int j=0; j<i; j++) {
+                result = iter.next();
+            }
+            return result;
+        }
+    }
+
+    public static <T> boolean contains(Iterable<T> ts, T t) {
+        if (ts instanceof Collection<?>) {
+            return ((Collection<?>) ts).contains(t);
+        } else {
+            for (T t2 : ts) {
+                if (t2.equals(t)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+    }
+
+    public static <T> boolean isEmpty(Iterable<T> ts) {
+        if (ts instanceof Collection<?>) {
+            return ((Collection<?>) ts).isEmpty();
+        } else {
+            return !ts.iterator().hasNext();
+        }
+    }
+
+    public static class Pair<A, B> implements Serializable {
+        private static final long serialVersionUID = -7631774746419135931L;
+
+        private A a;
+
+        private B b;
+
+        private int hashCode;
+
+        public Pair( A a, B b ) {
+
+            this.a = a;
+            this.b = b;
+            hashCode = 0;
+        }
+
+        public void setA( A a ) {
+
+            this.a = a;
+            hashCode = 0;
+        }
+
+        public A getA( ) {
+
+            return a;
+        }
+
+        public void setB( B b ) {
+
+            this.b = b;
+            hashCode = 0;
+        }
+
+        public B getB( ) {
+
+            return b;
+        }
+
+        @Override
+        public int hashCode( ) {
+
+            if ( hashCode == 0 ) {
+                hashCode = 17;
+                hashCode = 37 * hashCode + ( a != null ? a.hashCode( ) : 0 );
+                hashCode = 37 * hashCode + ( b != null ? b.hashCode( ) : 0 );
+            }
+            return hashCode;
+        }
+
+        @Override
+        public boolean equals( Object obj ) {
+
+            boolean result;
+            if ( this == obj ) {
+                result = true;
+            } else if ( obj instanceof Pair<?, ?> ) {
+                Pair<?, ?> pair = (Pair<?, ?>) obj;
+                result = ( this.a != null && this.a.equals( pair.a ) || this.a == null && pair.a == null ) && ( this.b != null && this.b.equals( pair.b ) || this.b == null && pair.b == null );
+            } else {
+                result = false;
+            }
+            return result;
+        }
+
+        @Override
+        public String toString( ) {
+
+            return "[" + (a==null?"null":a.toString( )) + ", " +
+                (b==null?"null":b.toString( )) + "]"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
+        }
+    }
+
+    public static class Triple<A, B, C> implements Serializable {
+        private static final long serialVersionUID = 6806146864367514601L;
+
+        private A a;
+
+        private B b;
+
+        private C c;
+
+        private int hashCode;
+
+        public Triple( A a, B b, C c ) {
+
+            this.a = a;
+            this.b = b;
+            this.c = c;
+            hashCode = 0;
+        }
+
+        public void setA( A a ) {
+
+            this.a = a;
+            hashCode = 0;
+        }
+
+        public A getA( ) {
+
+            return a;
+        }
+
+        public void setB( B b ) {
+
+            this.b = b;
+            hashCode = 0;
+        }
+
+        public B getB( ) {
+
+            return b;
+        }
+
+        public void setC( C c ) {
+
+            this.c = c;
+            hashCode = 0;
+        }
+
+        public C getC( ) {
+
+            return c;
+        }
+
+        @Override
+        public int hashCode( ) {
+
+            if ( hashCode == 0 ) {
+                hashCode = 17;
+                hashCode = 37 * hashCode + ( a != null ? a.hashCode( ) : 0 );
+                hashCode = 37 * hashCode + ( b != null ? b.hashCode( ) : 0 );
+                hashCode = 37 * hashCode + ( c != null ? c.hashCode( ) : 0 );
+            }
+            return hashCode;
+        }
+
+        @Override
+        public boolean equals( Object obj ) {
+
+            boolean result;
+            if ( this == obj ) {
+                result = true;
+            } else if ( obj instanceof Triple<?, ?, ?> ) {
+                Triple<?, ?, ?> thrice = (Triple<?, ?, ?>) obj;
+                result = ( this.a != null && this.a.equals( thrice.a ) || this.a == null && thrice.a == null ) && ( this.b != null && this.b.equals( thrice.b ) || this.b == null && thrice.b == null ) && ( this.c != null && this.c.equals( thrice.c ) || this.c == null && thrice.c == null );
+            } else {
+                result = false;
+            }
+            return result;
+        }
+
+        @Override
+        public String toString( ) {
+
+            return "[" + a + ", " + b + ", " + c + "]"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
+        }
+    }
+}