001    /*
002     *  Copyright 2001-2005 Stephen Colebourne
003     *
004     *  Licensed under the Apache License, Version 2.0 (the "License");
005     *  you may not use this file except in compliance with the License.
006     *  You may obtain a copy of the License at
007     *
008     *      http://www.apache.org/licenses/LICENSE-2.0
009     *
010     *  Unless required by applicable law or agreed to in writing, software
011     *  distributed under the License is distributed on an "AS IS" BASIS,
012     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     *  See the License for the specific language governing permissions and
014     *  limitations under the License.
015     */
016    package org.joda.time.field;
017    
018    import org.joda.time.DateTimeField;
019    
020    /**
021     * Converts a lenient DateTimeField into a strict one. By being strict, the set
022     * throws an IllegalArgumentException if the value is out of bounds.
023     * <p>
024     * StrictDateTimeField is thread-safe and immutable.
025     *
026     * @author Brian S O'Neill
027     * @see org.joda.time.chrono.StrictChronology
028     * @see LenientDateTimeField
029     * @since 1.0
030     */
031    public class StrictDateTimeField extends DelegatedDateTimeField {
032    
033        private static final long serialVersionUID = 3154803964207950910L;
034    
035        /**
036         * Returns a strict version of the given field. If it is already strict,
037         * then it is returned as-is. Otherwise, a new StrictDateTimeField is
038         * returned.
039         */
040        public static DateTimeField getInstance(DateTimeField field) {
041            if (field == null) {
042                return null;
043            }
044            if (field instanceof LenientDateTimeField) {
045                field = ((LenientDateTimeField)field).getWrappedField();
046            }
047            if (!field.isLenient()) {
048                return field;
049            }
050            return new StrictDateTimeField(field);
051        }
052    
053        protected StrictDateTimeField(DateTimeField field) {
054            super(field);
055        }
056    
057        public final boolean isLenient() {
058            return false;
059        }
060    
061        /**
062         * Does a bounds check before setting the value.
063         *
064         * @throws IllegalArgumentException if the value is invalid
065         */
066        public long set(long instant, int value) {
067            FieldUtils.verifyValueBounds
068                (this, value, getMinimumValue(instant), getMaximumValue(instant));
069            return super.set(instant, value);
070        }
071    }