package org.codehaus.plexus.interpolation.multi;
   
   /*
    * Copyright 2001-2009 Codehaus Foundation.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  public final class DelimiterSpecification {
      public static final DelimiterSpecification DEFAULT_SPEC = DelimiterSpecification.parse("${*}");
  
      private String begin;
  
      private String end;
  
      private int nextStart;
  
      public DelimiterSpecification(String begin, String end) {
          this.begin = begin;
          this.end = end;
      }
  
      public int getNextStartIndex() {
          return nextStart;
      }
  
      public void setNextStartIndex(int nextStart) {
          this.nextStart = nextStart;
      }
  
      public void clearNextStart() {
          nextStart = -1;
      }
  
      public static DelimiterSpecification parse(String delimiterSpec) {
          final String[] spec = new String[2];
  
          int splitIdx = delimiterSpec.indexOf('*');
          if (splitIdx < 0) {
              spec[0] = delimiterSpec;
              spec[1] = spec[0];
          } else if (splitIdx == delimiterSpec.length() - 1) {
              spec[0] = delimiterSpec.substring(0, delimiterSpec.length() - 1);
              spec[1] = spec[0];
          } else {
              spec[0] = delimiterSpec.substring(0, splitIdx);
              spec[1] = delimiterSpec.substring(splitIdx + 1);
          }
  
          return new DelimiterSpecification(spec[0], spec[1]);
      }
  
      public String getBegin() {
          return begin;
      }
  
      public String getEnd() {
          return end;
      }
  
      public int hashCode() {
          final int prime = 31;
          int result = 1;
          result = prime * result + ((begin == null) ? 0 : begin.hashCode());
          result = prime * result + ((end == null) ? 0 : end.hashCode());
          return result;
      }
  
      public boolean equals(Object obj) {
          if (this == obj) return true;
          if (obj == null) return false;
          if (getClass() != obj.getClass()) return false;
          DelimiterSpecification other = (DelimiterSpecification) obj;
          if (begin == null) {
              if (other.begin != null) return false;
          } else if (!begin.equals(other.begin)) return false;
          if (end == null) {
              if (other.end != null) return false;
          } else if (!end.equals(other.end)) return false;
          return true;
      }
  
      public String toString() {
          return "Interpolation delimiter [begin: '" + begin + "', end: '" + end + "']";
      }
  }