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Java example source code file (DelegatedDurationField.java)

This example Java source code file (DelegatedDurationField.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

delegateddurationfield, durationfield, durationfieldtype, illegalargumentexception, serializable, string, the

The DelegatedDurationField.java Java example source code

/*
 *  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 org.joda.time.field;

import java.io.Serializable;

import org.joda.time.DurationField;
import org.joda.time.DurationFieldType;

/**
 * <code>DelegatedDurationField delegates each method call to the
 * duration field it wraps.
 * <p>
 * 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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