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      1 /*
      2  * Copyright 2013, Google Inc.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are
      7  * met:
      8  *
      9  *     * Redistributions of source code must retain the above copyright
     10  * notice, this list of conditions and the following disclaimer.
     11  *     * Redistributions in binary form must reproduce the above
     12  * copyright notice, this list of conditions and the following disclaimer
     13  * in the documentation and/or other materials provided with the
     14  * distribution.
     15  *     * Neither the name of Google Inc. nor the names of its
     16  * contributors may be used to endorse or promote products derived from
     17  * this software without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 package org.jf.dexlib2.immutable.util;
     33 
     34 import org.jf.dexlib2.immutable.ImmutableMethodParameter;
     35 
     36 import javax.annotation.Nonnull;
     37 import java.util.Iterator;
     38 
     39 public class ParamUtil {
     40     private static int findTypeEnd(@Nonnull String str, int index) {
     41         char c = str.charAt(index);
     42         switch (c) {
     43             case 'Z':
     44             case 'B':
     45             case 'S':
     46             case 'C':
     47             case 'I':
     48             case 'J':
     49             case 'F':
     50             case 'D':
     51                 return index+1;
     52             case 'L':
     53                 while (str.charAt(index++) != ';') {}
     54                 return index;
     55             case '[':
     56                 while (str.charAt(index++) != '[') {}
     57                 return findTypeEnd(str, index);
     58             default:
     59                 throw new IllegalArgumentException(String.format("Param string \"%s\" contains invalid type prefix: %s",
     60                         str, Character.toString(c)));
     61         }
     62     }
     63 
     64     @Nonnull
     65     public static Iterable<ImmutableMethodParameter> parseParamString(@Nonnull final String params) {
     66         return new Iterable<ImmutableMethodParameter>() {
     67             @Override public Iterator<ImmutableMethodParameter> iterator() {
     68                 return new Iterator<ImmutableMethodParameter>() {
     69 
     70                     private int index = 0;
     71 
     72                     @Override public boolean hasNext() {
     73                         return index < params.length();
     74                     }
     75 
     76                     @Override public ImmutableMethodParameter next() {
     77                         int end = findTypeEnd(params, index);
     78                         String ret = params.substring(index, end);
     79                         index = end;
     80                         return new ImmutableMethodParameter(ret, null, null);
     81                     }
     82 
     83                     @Override public void remove() {
     84                         throw new UnsupportedOperationException();
     85                     }
     86                 };
     87             }
     88         };
     89     }
     90 }
     91