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/*
 *  Copyright 2001-2009 Stephen Colebourne
 *
 *  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 com.facebook.presto.jdbc.internal.joda.time.field;

import java.io.Serializable;

import com.facebook.presto.jdbc.internal.joda.time.DurationField;
import com.facebook.presto.jdbc.internal.joda.time.DurationFieldType;

/**
 * DelegatedDurationField delegates each method call to the
 * duration field it wraps.
 * 

* DelegatedDurationField is thread-safe and immutable, and its subclasses must * be as well. * * @author Brian S O'Neill * @see DecoratedDurationField * @since 1.0 */ public class DelegatedDurationField extends DurationField implements Serializable { /** Serialization lock. */ private static final long serialVersionUID = -5576443481242007829L; /** The DurationField being wrapped */ private final DurationField iField; /** The field type */ private final DurationFieldType iType; /** * Constructor. * * @param field the base field */ protected DelegatedDurationField(DurationField field) { this(field, null); } /** * Constructor. * * @param field the base field * @param type the field type to use */ protected DelegatedDurationField(DurationField field, DurationFieldType type) { super(); if (field == null) { throw new IllegalArgumentException("The field must not be null"); } iField = field; iType = (type == null ? field.getType() : type); } //----------------------------------------------------------------------- /** * Gets the wrapped duration field. * * @return the wrapped DurationField */ public final DurationField getWrappedField() { return iField; } public DurationFieldType getType() { return iType; } public String getName() { return iType.getName(); } /** * Returns true if this field is supported. */ public boolean isSupported() { return iField.isSupported(); } public boolean isPrecise() { return iField.isPrecise(); } public int getValue(long duration) { return iField.getValue(duration); } public long getValueAsLong(long duration) { return iField.getValueAsLong(duration); } public int getValue(long duration, long instant) { return iField.getValue(duration, instant); } public long getValueAsLong(long duration, long instant) { return iField.getValueAsLong(duration, instant); } public long getMillis(int value) { return iField.getMillis(value); } public long getMillis(long value) { return iField.getMillis(value); } public long getMillis(int value, long instant) { return iField.getMillis(value, instant); } public long getMillis(long value, long instant) { return iField.getMillis(value, instant); } public long add(long instant, int value) { return iField.add(instant, value); } public long add(long instant, long value) { return iField.add(instant, value); } public int getDifference(long minuendInstant, long subtrahendInstant) { return iField.getDifference(minuendInstant, subtrahendInstant); } public long getDifferenceAsLong(long minuendInstant, long subtrahendInstant) { return iField.getDifferenceAsLong(minuendInstant, subtrahendInstant); } public long getUnitMillis() { return iField.getUnitMillis(); } public int compareTo(DurationField durationField) { return iField.compareTo(durationField); } public boolean equals(Object obj) { if (obj instanceof DelegatedDurationField) { return iField.equals(((DelegatedDurationField) obj).iField); } return false; } public int hashCode() { return iField.hashCode() ^ iType.hashCode(); } public String toString() { return (iType == null) ? iField.toString() : ("DurationField[" + iType + ']'); } }





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