content: /*
   *  Licensed to the Apache Software Foundation (ASF) under one or more
   *  contributor license agreements.  See the NOTICE file distributed with
   *  this work for additional information regarding copyright ownership.
   *  The ASF licenses this file to You 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
   *
   *      https://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.
   *
   */
  package org.apache.tools.ant.types.resources;
  
  import org.apache.tools.ant.BuildException;
  
  /**
   * ResourceCollection that imposes a size limit on another ResourceCollection.
   * @since Ant 1.7.1
   */
  public abstract class SizeLimitCollection extends BaseResourceCollectionWrapper {
      private static final String BAD_COUNT
          = "size-limited collection count should be set to an int >= 0";
  
      private int count = 1;
  
      /**
       * Set the number of resources to be included.
       * @param i the count as <code>int</code>.
       */
      public synchronized void setCount(int i) {
          checkAttributesAllowed();
          count = i;
      }
  
      /**
       * Get the number of resources to be included. Default is 1.
       * @return the count as <code>int</code>.
       */
      public synchronized int getCount() {
          return count;
      }
  
      /**
       * Efficient size implementation.
       * @return int size
       */
      @Override
      public synchronized int size() {
          return Math.min(getResourceCollection().size(), getValidCount());
      }
  
      /**
       * Get the count, verifying it is &gt;= 0.
       * @return int count
       */
      protected int getValidCount() {
          int ct = getCount();
          if (ct < 0) {
              throw new BuildException(BAD_COUNT);
          }
          return ct;
      }
  
  }
  