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    1   /***
    2    *
    3    * Copyright 2004 Protique Ltd
    4    *
    5    * Licensed under the Apache License, Version 2.0 (the "License");
    6    * you may not use this file except in compliance with the License.
    7    * You may obtain a copy of the License at
    8    *
    9    * http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   *
    17   **/
    18
    19  package org.codehaus.activemq.filter;
    20
    21  import javax.jms.JMSException;
    22  import javax.jms.Message;
    23
    24
    25  /***
    26   * Represents a filter using an expression
    27   *
    28   * @version $Revision: 1.2 $
    29   */
    30  public class ExpressionFilter implements Filter {
    31
    32      private Expression expression;
    33
    34      public ExpressionFilter(Expression expression) {
    35          this.expression = expression;
    36      }
    37
    38      public boolean matches(Message message) throws JMSException {
    39          Object value = expression.evaluate(message);
    40          if (value != null && value instanceof Boolean) {
    41              return ((Boolean) value).booleanValue();
    42          }
    43          return false;
    44      }
    45
    46      public boolean isWildcard() {
    47          return false;
    48      }
    49
    50      /***
    51       * @return Returns the expression.
    52       */
    53      public Expression getExpression() {
    54          return expression;
    55      }
    56  }