+ private Map<String, Integer> params;
+ private byte[][] values;
+ private Integer[] vars;
+ private boolean wildcard;
+
+
+ /*
+ * These two methods are pairs of searching performance for variables Spark Style.
+ * setParams evaluates the target path, and sets a HashMap that will return an Integer.
+ * the Keys are both :key and key so that there will be no string operations during
+ * a transaction
+ *
+ * For the Integer, if the High Order is 0, then it is just one value. If High Order >0, then it is
+ * a multi-field option, i.e. ending with a wild-card.
+ */
+ public Match(String path) {
+ params = new HashMap<>();
+ if (path!=null) {
+ String[] pa = path.split("/");
+ values = new byte[pa.length][];
+ vars = new Integer[pa.length];
+
+ int val = 0;
+ String key;
+ for (int i=0;i<pa.length && !wildcard;++i) {
+ if (pa[i].startsWith(":")) {
+ if (pa[i].endsWith("*")) {
+ val = i | pa.length<<16; // load end value in high order bits
+ key = pa[i].substring(0, pa[i].length()-1);// remove *
+ wildcard = true;
+ } else {
+ val = i;
+ key = pa[i];
+ }
+ params.put(key,val); //put in :key
+ params.put(key.substring(1,key.length()), val); // put in just key, better than adding a missing one, like Spark
+ // values[i]=null; // null stands for Variable
+ vars[i]=val;
+ } else {
+ values[i]=pa[i].getBytes();
+ if (pa[i].endsWith("*")) {
+ wildcard = true;
+ if (pa[i].length()>1) {
+ /* remove * from value */
+ int newlength = values[i].length-1;
+ byte[] real = new byte[newlength];
+ System.arraycopy(values[i],0,real,0,newlength);
+ values[i]=real;
+ } else {
+ vars[i]=0; // this is actually a variable, if it only contains a "*"
+ }
+ }
+ }
+ }
+ }
+ }
+
+ /*
+ * This is the second of the param evaluation functions. First, we look up to see if there is
+ * any reference by key in the params Map created by the above.
+ *
+ * The resulting Integer, if not null, is split high/low order into start and end.
+ * We evaluate the string for '/', rather than splitting into String[] to avoid the time/mem needed
+ * We traverse to the proper field number for slash, evaluate the end (whether wild card or no),
+ * and return the substring.
+ *
+ * The result is something less than .003 milliseconds per evaluation
+ *
+ */
+ public String param(String path,String key) {
+ Integer val = params.get(key); // :key or key
+ if (val!=null) {
+ int start = val & 0xFFFF;
+ int end = (val >> 16) & 0xFFFF;
+ int idx = -1;
+ int i;
+ for (i=0;i<start;++i) {
+ idx = path.indexOf('/',idx+1);
+ if (idx<0)break;
+ }
+ if (i==start) {
+ ++idx;
+ if (end==0) {
+ end = path.indexOf('/',idx);
+ if (end<0)end=path.length();
+ } else {
+ end=path.length();
+ }
+ return path.substring(idx,end);
+ } else if (i==start-1) { // if last spot was left blank, i.e. :key*
+ return "";
+ }
+ }
+ return null;
+ }
+
+ public boolean match(String path) {
+ if (path==null|| path.length()==0 || "/".equals(path) ) {
+ if (values==null)return true;
+ switch(values.length) {
+ case 0: return true;
+ case 1: return values[0].length==0;
+ default: return false;
+ }
+ }
+ boolean rv = true;
+ byte[] pabytes = path.getBytes();
+ int field=0;
+ int fieldIdx = 0;