- /*
- * Copyright 2003-2004 The Apache Software 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.
- */
- package org.apache.commons.attributes;
-
- /**
- * Implementation of the {@link Sealable} interface. Subclasses should call
- * {@link #checkSealed()} before setting any bean properties.
- */
- public class DefaultSealable implements Sealable {
-
- /**
- * Boolean flag indicating whether the {@link seal()} method
- * has been called.
- */
- private boolean sealed = false;
-
- public DefaultSealable () {
- }
-
- /**
- * Checks if the {@link #seal()} method has been called and throws a
- * <code>IllegalStateException</code> if it has.
- *
- * @throws IllegalStateException if this attribute has been sealed.
- */
- protected void checkSealed () throws IllegalStateException {
- if (sealed) {
- throw new IllegalStateException ("sealed");
- }
- }
-
- /**
- * Seals this attribute. Any future calls to the
- * {@link #checkSealed()} method will result in an
- * <code>IllegalStateException</code> being thrown.
- */
- public void seal () {
- this.sealed = true;
- }
- }