Added a toString() that does something nice with arrays.

git-svn-id: https://samskivert.googlecode.com/svn/trunk@13 6335cc39-0255-0410-8fd6-9bcaacd3b74c

projects/samskivert/src/java/com/samskivert/util/StringUtil.java

@@ -1,5 +1,5 @@
 //
-// $Id: StringUtil.java,v 1.1 2000/10/31 00:04:15 mdb Exp $
+// $Id: StringUtil.java,v 1.2 2000/10/31 00:51:13 mdb Exp $
 
 package com.samskivert.util;
 
@@ -15,4 +15,84 @@ public class StringUtil
     {
 	return (value == null || value.trim().length() == 0);
     }
+
+    /**
+     * Converts the supplied object to a string. Normally this is
+     * accomplished via the object's built in <code>toString()</code>
+     * method, but in the case of arrays, <code>toString()</code> is
+     * called on each element and the contents are listed like so:
+     *
+     * <pre>
+     * (value, value, value)
+     * </pre>
+     *
+     * Arrays of ints, longs, floats and doubles are also handled for
+     * convenience. Also note that passing null will result in the string
+     * "null" being returned.
+     */
+    public static String toString (Object val)
+    {
+	StringBuffer buf = new StringBuffer();
+
+	if (val instanceof int[]) {
+	    buf.append("(");
+	    int[] v = (int[])val;
+	    for (int i = 0; i < v.length; i++) {
+		if (i > 0) {
+		    buf.append(", ");
+		}
+		buf.append(v[i]);
+	    }
+	    buf.append(")");
+
+	} else if (val instanceof long[]) {
+	    buf.append("(");
+	    long[] v = (long[])val;
+	    for (int i = 0; i < v.length; i++) {
+		if (i > 0) {
+		    buf.append(", ");
+		}
+		buf.append(v[i]);
+	    }
+	    buf.append(")");
+
+	} else if (val instanceof float[]) {
+	    buf.append("(");
+	    float[] v = (float[])val;
+	    for (int i = 0; i < v.length; i++) {
+		if (i > 0) {
+		    buf.append(", ");
+		}
+		buf.append(v[i]);
+	    }
+	    buf.append(")");
+
+	} else if (val instanceof double[]) {
+	    buf.append("(");
+	    double[] v = (double[])val;
+	    for (int i = 0; i < v.length; i++) {
+		if (i > 0) {
+		    buf.append(", ");
+		}
+		buf.append(v[i]);
+	    }
+	    buf.append(")");
+
+	} else if (val instanceof Object[]) {
+	    buf.append("(");
+	    Object[] v = (Object[])val;
+	    for (int i = 0; i < v.length; i++) {
+		if (i > 0) {
+		    buf.append(", ");
+		}
+		buf.append(v[i]);
+	    }
+	    buf.append(")");
+
+	} else {
+	    buf.append(val);
+	}
+
+	return buf.toString();
+    }
 }