/*
* Copyright 2001-2006 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.goda.time;
import org.goda.util.ArrayUtils;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;
import org.goda.time.base.AbstractPartial;
import org.goda.time.field.AbstractPartialFieldProperty;
import org.goda.time.field.FieldUtils;
import org.goda.time.format.DateTimeFormat;
import org.goda.time.format.DateTimeFormatter;
import org.goda.time.format.ISODateTimeFormat;
/**
* Partial is an immutable partial datetime supporting any set of datetime fields.
* <p>
* A Partial instance can be used to hold any combination of fields.
* The instance does not contain a time zone, so any datetime is local.
* <p>
* A Partial can be matched against an instant using {@link #isMatch(ReadableInstant)}.
* This method compares each field on this partial with those of the instant
* and determines if the partial matches the instant.
* Given this definition, an empty Partial instance represents any datetime
* and always matches.
* <p>
* Calculations on Partial are performed using a {@link Chronology}.
* This chronology is set to be in the UTC time zone for all calculations.
* <p>
* Each individual field can be queried in two ways:
* <ul>
* <li><code>get(DateTimeFieldType.monthOfYear())</code>
* <li><code>property(DateTimeFieldType.monthOfYear()).get()</code>
* </ul>
* The second technique also provides access to other useful methods on the
* field:
* <ul>
* <li>numeric value - <code>monthOfYear().get()</code>
* <li>text value - <code>monthOfYear().getAsText()</code>
* <li>short text value - <code>monthOfYear().getAsShortText()</code>
* <li>maximum/minimum values - <code>monthOfYear().getMaximumValue()</code>
* <li>add/subtract - <code>monthOfYear().addToCopy()</code>
* <li>set - <code>monthOfYear().setCopy()</code>
* </ul>
* <p>
* Partial is thread-safe and immutable, provided that the Chronology is as well.
* All standard Chronology classes supplied are thread-safe and immutable.
*
* @author Stephen Colebourne
* @since 1.1
*/
public final class Partial
extends AbstractPartial
implements ReadablePartial, Serializable {
/** Serialization version */
private static final long serialVersionUID = 12324121189002L;
/** The chronology in use. */
private final Chronology iChronology;
/** The set of field types. */
private final DateTimeFieldType[] iTypes;
/** The values of each field in this partial. */
private final int[] iValues;
/** The formatter to use, [0] may miss some fields, [1] doesn't miss any fields. */
private transient DateTimeFormatter[] iFormatter;
// Constructors
//-----------------------------------------------------------------------
/**
* Constructs a Partial with no fields or values, which can be considered
* to represent any date.
* <p>
* This is most useful when constructing partials, for example:
* <pre>
* Partial p = new Partial()
* .with(DateTimeFieldType.dayOfWeek(), 5)
* .with(DateTimeFieldType.hourOfDay(), 12)
* .with(DateTimeFieldType.minuteOfHour(), 20);
* </pre>
* Note that, although this is a clean way to write code, it is fairly
* inefficient internally.
* <p>
* The constructor uses the default ISO chronology.
*/
public Partial() {
this((Chronology) null);
}
/**
* Constructs a Partial with no fields or values, which can be considered
* to represent any date.
* <p>
* This is most useful when constructing partials, for example:
* <pre>
* Partial p = new Partial(chrono)
* .with(DateTimeFieldType.dayOfWeek(), 5)
* .with(DateTimeFieldType.hourOfDay(), 12)
* .with(DateTimeFieldType.minuteOfHour(), 20);
* </pre>
* Note that, although this is a clean way to write code, it is fairly
* inefficient internally.
*
* @param chrono the chronology, null means ISO
*/
public Partial(Chronology chrono) {
super();
iChronology = DateTimeUtils.getChronology(chrono).withUTC();
iTypes = new DateTimeFieldType[0];
iValues = new int[0];
}
/**
* Constructs a Partial with the specified field and value.
* <p>
* The constructor uses the default ISO chronology.
*
* @param type the single type to create the partial from, not null
* @param value the value to store
* @throws IllegalArgumentException if the type or value is invalid
*/
public Partial(DateTimeFieldType type, int value) {
this(type, value, null);
}
/**
* Constructs a Partial with the specified field and value.
* <p>
* The constructor uses the specified chronology.
*
* @param type the single type to create the partial from, not null
* @param value the value to store
* @param chronology the chronology, null means ISO
* @throws IllegalArgumentException if the type or value is invalid
*/
public Partial(DateTimeFieldType type, int value, Chronology chronology) {
super();
chronology = DateTimeUtils.getChronology(chronology).withUTC();
iChronology = chronology;
if (type == null) {
throw new IllegalArgumentException("The field type must not be null");
}
iTypes = new DateTimeFieldType[] {type};
iValues = new int[] {value};
chronology.validate(this, iValues);
}
/**
* Constructs a Partial with the specified fields and values.
* The fields must be specified in the order largest to smallest.
* <p>
* The constructor uses the specified chronology.
*
* @param types the types to create the partial from, not null
* @param values the values to store, not null
* @throws IllegalArgumentException if the types or values are invalid
*/
public Partial(DateTimeFieldType[] types, int[] values) {
this(types, values, null);
}
/**
* Constructs a Partial with the specified fields and values.
* The fields must be specified in the order largest to smallest.
* <p>
* The constructor uses the specified chronology.
*
* @param types the types to create the partial from, not null
* @param values the values to store, not null
* @param chronology the chronology, null means ISO
* @throws IllegalArgumentException if the types or values are invalid
*/
public Partial(DateTimeFieldType[] types, int[] values, Chronology chronology) {
super();
chronology = DateTimeUtils.getChronology(chronology).withUTC();
iChronology = chronology;
if (types == null) {
throw new IllegalArgumentException("Types array must not be null");
}
if (values == null) {
throw new IllegalArgumentException("Values array must not be null");
}
if (values.length != types.length) {
throw new IllegalArgumentException("Values array must be the same length as the types array");
}
if (types.length == 0) {
iTypes = types;
iValues = values;
return;
}
for (int i = 0; i < types.length; i++) {
if (types[i] == null) {
throw new IllegalArgumentException("Types array must not contain null: index " + i);
}
}
DurationField lastUnitField = null;
for (int i = 0; i < types.length; i++) {
DateTimeFieldType loopType = types[i];
DurationField loopUnitField = loopType.getDurationType().getField(iChronology);
if (i > 0) {
int compare = lastUnitField.compareTo(loopUnitField);
if (compare < 0 || (compare != 0 && loopUnitField.isSupported() == false)) {
throw new IllegalArgumentException("Types array must be in order largest-smallest: " +
types[i - 1].getName() + " < " + loopType.getName());
} else if (compare == 0) {
if (types[i - 1].getRangeDurationType() == null) {
if (loopType.getRangeDurationType() == null) {
throw new IllegalArgumentException("Types array must not contain duplicate: " + loopType.getName());
}
} else {
if (loopType.getRangeDurationType() == null) {
throw new IllegalArgumentException("Types array must be in order largest-smallest: " +
types[i - 1].getName() + " < " + loopType.getName());
}
DurationField lastRangeField = types[i - 1].getRangeDurationType().getField(iChronology);
DurationField loopRangeField = loopType.getRangeDurationType().getField(iChronology);
if (lastRangeField.compareTo(loopRangeField) < 0) {
throw new IllegalArgumentException("Types array must be in order largest-smallest: " +
types[i - 1].getName() + " < " + loopType.getName());
}
if (lastRangeField.compareTo(loopRangeField) == 0) {
throw new IllegalArgumentException("Types array must not contain duplicate: " + loopType.getName());
}
}
}
}
lastUnitField = loopUnitField;
}
iTypes = new DateTimeFieldType[types.length] ;
ArrayUtils.copyArray(types, iTypes);
chronology.validate(this, values);
iValues = new int[ values.length];
ArrayUtils.copyArray(values, iValues);
}
/**
* Constructs a Partial by copying all the fields and types from
* another partial.
* <p>
* This is most useful when copying from a YearMonthDay or TimeOfDay.
*/
public Partial(ReadablePartial partial) {
super();
if (partial == null) {
throw new IllegalArgumentException("The partial must not be null");
}
iChronology = DateTimeUtils.getChronology(partial.getChronology()).withUTC();
iTypes = new DateTimeFieldType[partial.size()];
iValues = new int[partial.size()];
for (int i = 0; i < partial.size(); i++) {
iTypes[i] = partial.getFieldType(i);
iValues[i] = partial.getValue(i);
}
}
/**
* Constructs a Partial with the specified values.
* This constructor assigns and performs no validation.
*
* @param partial the partial to copy
* @param values the values to store
* @throws IllegalArgumentException if the types or values are invalid
*/
Partial(Partial partial, int[] values) {
super();
iChronology = partial.iChronology;
iTypes = partial.iTypes;
iValues = values;
}
/**
* Constructs a Partial with the specified chronology, fields and values.
* This constructor assigns and performs no validation.
*
* @param chronology the chronology
* @param types the types to create the partial from
* @param values the values to store
* @throws IllegalArgumentException if the types or values are invalid
*/
Partial(Chronology chronology, DateTimeFieldType[] types, int[] values) {
super();
iChronology = chronology;
iTypes = types;
iValues = values;
}
//-----------------------------------------------------------------------
/**
* Gets the number of fields in this partial.
*
* @return the field count
*/
public int size() {
return iTypes.length;
}
/**
* Gets the chronology of the partial which is never null.
* <p>
* The {@link Chronology} is the calculation engine behind the partial and
* provides conversion and validation of the fields in a particular calendar system.
*
* @return the chronology, never null
*/
public Chronology getChronology() {
return iChronology;
}
/**
* Gets the field for a specific index in the chronology specified.
*
* @param index the index to retrieve
* @param chrono the chronology to use
* @return the field
* @throws IndexOutOfBoundsException if the index is invalid
*/
protected DateTimeField getField(int index, Chronology chrono) {
return iTypes[index].getField(chrono);
}
/**
* Gets the field type at the specified index.
*
* @param index the index to retrieve
* @return the field at the specified index
* @throws IndexOutOfBoundsException if the index is invalid
*/
public DateTimeFieldType getFieldType(int index) {
return iTypes[index];
}
/**
* Gets an array of the field type of each of the fields that
* this partial supports.
* <p>
* The fields are returned largest to smallest.
*
* @return the array of field types (cloned), largest to smallest
*/
public DateTimeFieldType[] getFieldTypes() {
DateTimeFieldType[] ret = new DateTimeFieldType[iTypes.length];
ArrayUtils.copyArray( iTypes, ret);
return ret;
}
//-----------------------------------------------------------------------
/**
* Gets the value of the field at the specifed index.
*
* @param index the index
* @return the value
* @throws IndexOutOfBoundsException if the index is invalid
*/
public int getValue(int index) {
return iValues[index];
}
/**
* Gets an array of the value of each of the fields that
* this partial supports.
* <p>
* The fields are returned largest to smallest.
* Each value corresponds to the same array index as <code>getFieldTypes()</code>
*
* @return the current values of each field (cloned), largest to smallest
*/
public int[] getValues() {
int[] ret = new int[iValues.length];
ArrayUtils.copyArray( iValues, ret);
return ret;
}
//-----------------------------------------------------------------------
/**
* Creates a new Partial instance with the specified chronology.
* This instance is immutable and unaffected by this method call.
* <p>
* This method retains the values of the fields, thus the result will
* typically refer to a different instant.
* <p>
* The time zone of the specified chronology is ignored, as Partial
* operates without a time zone.
*
* @param newChronology the new chronology, null means ISO
* @return a copy of this datetime with a different chronology
* @throws IllegalArgumentException if the values are invalid for the new chronology
*/
public Partial withChronologyRetainFields(Chronology newChronology) {
newChronology = DateTimeUtils.getChronology(newChronology);
newChronology = newChronology.withUTC();
if (newChronology == getChronology()) {
return this;
} else {
Partial newPartial = new Partial(newChronology, iTypes, iValues);
newChronology.validate(newPartial, iValues);
return newPartial;
}
}
//-----------------------------------------------------------------------
/**
* Gets a copy of this date with the specified field set to a new value.
* <p>
* If this partial did not previously support the field, the new one will.
* Contrast this behaviour with {@link #withField(DateTimeFieldType, int)}.
* <p>
* For example, if the field type is <code>dayOfMonth</code> then the day
* would be changed/added in the returned instance.
*
* @param fieldType the field type to set, not null
* @param value the value to set
* @return a copy of this instance with the field set
* @throws IllegalArgumentException if the value is null or invalid
*/
public Partial with(DateTimeFieldType fieldType, int value) {
if (fieldType == null) {
throw new IllegalArgumentException("The field type must not be null");
}
int index = indexOf(fieldType);
if (index == -1) {
DateTimeFieldType[] newTypes = new DateTimeFieldType[iTypes.length + 1];
int[] newValues = new int[newTypes.length];
// find correct insertion point to keep largest-smallest order
int i = 0;
DurationField unitField = fieldType.getDurationType().getField(iChronology);
if (unitField.isSupported()) {
for (; i < iTypes.length; i++) {
DateTimeFieldType loopType = iTypes[i];
DurationField loopUnitField = loopType.getDurationType().getField(iChronology);
if (loopUnitField.isSupported()) {
int compare = unitField.compareTo(loopUnitField);
if (compare > 0) {
break;
} else if (compare == 0) {
DurationField rangeField = fieldType.getRangeDurationType().getField(iChronology);
DurationField loopRangeField = loopType.getRangeDurationType().getField(iChronology);
if (rangeField.compareTo(loopRangeField) > 0) {
break;
}
}
}
}
}
System.arraycopy(iTypes, 0, newTypes, 0, i);
System.arraycopy(iValues, 0, newValues, 0, i);
newTypes[i] = fieldType;
newValues[i] = value;
System.arraycopy(iTypes, i, newTypes, i + 1, newTypes.length - i - 1);
System.arraycopy(iValues, i, newValues, i + 1, newValues.length - i - 1);
Partial newPartial = new Partial(iChronology, newTypes, newValues);
iChronology.validate(newPartial, newValues);
return newPartial;
}
if (value == getValue(index)) {
return this;
}
int[] newValues = getValues();
newValues = getField(index).set(this, index, newValues, value);
return new Partial(this, newValues);
}
/**
* Gets a copy of this date with the specified field removed.
* <p>
* If this partial did not previously support the field, no error occurs.
*
* @param fieldType the field type to remove, may be null
* @return a copy of this instance with the field removed
*/
public Partial without(DateTimeFieldType fieldType) {
int index = indexOf(fieldType);
if (index != -1) {
DateTimeFieldType[] newTypes = new DateTimeFieldType[size() - 1];
int[] newValues = new int[size() - 1];
System.arraycopy(iTypes, 0, newTypes, 0, index);
System.arraycopy(iTypes, index + 1, newTypes, index, newTypes.length - index);
System.arraycopy(iValues, 0, newValues, 0, index);
System.arraycopy(iValues, index + 1, newValues, index, newValues.length - index);
Partial newPartial = new Partial(iChronology, newTypes, newValues);
iChronology.validate(newPartial, newValues);
return newPartial;
}
return this;
}
//-----------------------------------------------------------------------
/**
* Gets a copy of this Partial with the specified field set to a new value.
* <p>
* If this partial does not support the field, an exception is thrown.
* Contrast this behaviour with {@link #with(DateTimeFieldType, int)}.
* <p>
* For example, if the field type is <code>dayOfMonth</code> then the day
* would be changed in the returned instance if supported.
*
* @param fieldType the field type to set, not null
* @param value the value to set
* @return a copy of this instance with the field set
* @throws IllegalArgumentException if the value is null or invalid
*/
public Partial withField(DateTimeFieldType fieldType, int value) {
int index = indexOfSupported(fieldType);
if (value == getValue(index)) {
return this;
}
int[] newValues = getValues();
newValues = getField(index).set(this, index, newValues, value);
return new Partial(this, newValues);
}
/**
* Gets a copy of this Partial with the value of the specified field increased.
* If this partial does not support the field, an exception is thrown.
* <p>
* If the addition is zero, then <code>this</code> is returned.
* The addition will overflow into larger fields (eg. minute to hour).
* However, it will not wrap around if the top maximum is reached.
*
* @param fieldType the field type to add to, not null
* @param amount the amount to add
* @return a copy of this instance with the field updated
* @throws IllegalArgumentException if the value is null or invalid
* @throws ArithmeticException if the new datetime exceeds the capacity
*/
public Partial withFieldAdded(DurationFieldType fieldType, int amount) {
int index = indexOfSupported(fieldType);
if (amount == 0) {
return this;
}
int[] newValues = getValues();
newValues = getField(index).add(this, index, newValues, amount);
return new Partial(this, newValues);
}
/**
* Gets a copy of this Partial with the value of the specified field increased.
* If this partial does not support the field, an exception is thrown.
* <p>
* If the addition is zero, then <code>this</code> is returned.
* The addition will overflow into larger fields (eg. minute to hour).
* If the maximum is reached, the addition will wra.
*
* @param fieldType the field type to add to, not null
* @param amount the amount to add
* @return a copy of this instance with the field updated
* @throws IllegalArgumentException if the value is null or invalid
* @throws ArithmeticException if the new datetime exceeds the capacity
*/
public Partial withFieldAddWrapped(DurationFieldType fieldType, int amount) {
int index = indexOfSupported(fieldType);
if (amount == 0) {
return this;
}
int[] newValues = getValues();
newValues = getField(index).addWrapPartial(this, index, newValues, amount);
return new Partial(this, newValues);
}
/**
* Gets a copy of this Partial with the specified period added.
* <p>
* If the addition is zero, then <code>this</code> is returned.
* Fields in the period that aren't present in the partial are ignored.
* <p>
* This method is typically used to add multiple copies of complex
* period instances. Adding one field is best achieved using the method
* {@link #withFieldAdded(DurationFieldType, int)}.
*
* @param period the period to add to this one, null means zero
* @param scalar the amount of times to add, such as -1 to subtract once
* @return a copy of this instance with the period added
* @throws ArithmeticException if the new datetime exceeds the capacity
*/
public Partial withPeriodAdded(ReadablePeriod period, int scalar) {
if (period == null || scalar == 0) {
return this;
}
int[] newValues = getValues();
for (int i = 0; i < period.size(); i++) {
DurationFieldType fieldType = period.getFieldType(i);
int index = indexOf(fieldType);
if (index >= 0) {
newValues = getField(index).add(this, index, newValues,
FieldUtils.safeMultiply(period.getValue(i), scalar));
}
}
return new Partial(this, newValues);
}
/**
* Gets a copy of this instance with the specified period added.
* <p>
* If the amount is zero or null, then <code>this</code> is returned.
*
* @param period the duration to add to this one, null means zero
* @return a copy of this instance with the period added
* @throws ArithmeticException if the new datetime exceeds the capacity of a long
*/
public Partial plus(ReadablePeriod period) {
return withPeriodAdded(period, 1);
}
/**
* Gets a copy of this instance with the specified period take away.
* <p>
* If the amount is zero or null, then <code>this</code> is returned.
*
* @param period the period to reduce this instant by
* @return a copy of this instance with the period taken away
* @throws ArithmeticException if the new datetime exceeds the capacity of a long
*/
public Partial minus(ReadablePeriod period) {
return withPeriodAdded(period, -1);
}
//-----------------------------------------------------------------------
/**
* Gets the property object for the specified type, which contains
* many useful methods for getting and manipulating the partial.
* <p>
* See also {@link ReadablePartial#get(DateTimeFieldType)}.
*
* @param type the field type to get the property for, not null
* @return the property object
* @throws IllegalArgumentException if the field is null or unsupported
*/
public Property property(DateTimeFieldType type) {
return new Property(this, indexOfSupported(type));
}
//-----------------------------------------------------------------------
/**
* Does this partial match the specified instant.
* <p>
* A match occurs when all the fields of this partial are the same as the
* corresponding fields on the specified instant.
*
* @param instant an instant to check against, null means now in default zone
* @return true if this partial matches the specified instant
*/
public boolean isMatch(ReadableInstant instant) {
long millis = DateTimeUtils.getInstantMillis(instant);
Chronology chrono = DateTimeUtils.getInstantChronology(instant);
for (int i = 0; i < iTypes.length; i++) {
int value = iTypes[i].getField(chrono).get(millis);
if (value != iValues[i]) {
return false;
}
}
return true;
}
/**
* Does this partial match the specified partial.
* <p>
* A match occurs when all the fields of this partial are the same as the
* corresponding fields on the specified partial.
*
* @param partial a partial to check against, must not be null
* @return true if this partial matches the specified partial
* @throws IllegalArgumentException if the partial is null
* @throws IllegalArgumentException if the fields of the two partials do not match
* @since 1.5
*/
public boolean isMatch(ReadablePartial partial) {
if (partial == null) {
throw new IllegalArgumentException("The partial must not be null");
}
for (int i = 0; i < iTypes.length; i++) {
int value = partial.get(iTypes[i]);
if (value != iValues[i]) {
return false;
}
}
return true;
}
//-----------------------------------------------------------------------
/**
* Gets a formatter suitable for the fields in this partial.
* <p>
* If there is no appropriate ISO format, null is returned.
* This method may return a formatter that does not display all the
* fields of the partial. This might occur when you have overlapping
* fields, such as dayOfWeek and dayOfMonth.
*
* @return a formatter suitable for the fields in this partial, null
* if none is suitable
*/
public DateTimeFormatter getFormatter() {
DateTimeFormatter[] f = iFormatter;
if (f == null) {
if (size() == 0) {
return null;
}
f = new DateTimeFormatter[2];
try {
List<DateTimeFieldType> list = new ArrayList<DateTimeFieldType>(Arrays.asList(iTypes));
f[0] = ISODateTimeFormat.forFields(list, true, false);
if (list.size() == 0) {
f[1] = f[0];
}
} catch (IllegalArgumentException ex) {
// ignore
}
iFormatter = f;
}
return f[0];
}
//-----------------------------------------------------------------------
/**
* Output the date in an appropriate ISO8601 format.
* <p>
* This method will output the partial in one of two ways.
* If {@link #getFormatter()}
* <p>
* If there is no appropriate ISO format a dump of the fields is output
* via {@link #toStringList()}.
*
* @return ISO8601 formatted string
*/
public String toString() {
DateTimeFormatter[] f = iFormatter;
if (f == null) {
getFormatter();
f = iFormatter;
if (f == null) {
return toStringList();
}
}
DateTimeFormatter f1 = f[1];
if (f1 == null) {
return toStringList();
}
return f1.print(this);
}
/**
* Gets a string version of the partial that lists all the fields.
* <p>
* This method exists to provide a better debugging toString than
* the standard toString. This method lists all the fields and their
* values in a style similar to the collections framework.
*
* @return a toString format that lists all the fields
*/
public String toStringList() {
int size = size();
StringBuffer buf = new StringBuffer(20 * size);
buf.append('[');
for (int i = 0; i < size; i++) {
if (i > 0) {
buf.append(',').append(' ');
}
buf.append(iTypes[i].getName());
buf.append('=');
buf.append(iValues[i]);
}
buf.append(']');
return buf.toString();
}
/**
* Output the date using the specified format pattern.
* Unsupported fields will appear as special unicode characters.
*
* @param pattern the pattern specification, null means use <code>toString</code>
* @see org.joda.time.format.DateTimeFormat
*/
public String toString(String pattern) {
if (pattern == null) {
return toString();
}
return DateTimeFormat.forPattern(pattern).print(this);
}
/**
* Output the date using the specified format pattern.
* Unsupported fields will appear as special unicode characters.
*
* @param pattern the pattern specification, null means use <code>toString</code>
* @param locale Locale to use, null means default
* @see org.joda.time.format.DateTimeFormat
*/
public String toString(String pattern, Locale locale) {
if (pattern == null) {
return toString();
}
return DateTimeFormat.forPattern(pattern).withLocale(locale).print(this);
}
//-----------------------------------------------------------------------
/**
* The property class for <code>Partial</code>.
* <p>
* This class binds a <code>Partial</code> to a <code>DateTimeField</code>.
*
* @author Stephen Colebourne
* @since 1.1
*/
public static class Property extends AbstractPartialFieldProperty implements Serializable {
/** Serialization version */
private static final long serialVersionUID = 53278362873888L;
/** The partial */
private final Partial iPartial;
/** The field index */
private final int iFieldIndex;
/**
* Constructs a property.
*
* @param partial the partial instance
* @param fieldIndex the index in the partial
*/
Property(Partial partial, int fieldIndex) {
super();
iPartial = partial;
iFieldIndex = fieldIndex;
}
/**
* Gets the field that this property uses.
*
* @return the field
*/
public DateTimeField getField() {
return iPartial.getField(iFieldIndex);
}
/**
* Gets the partial that this property belongs to.
*
* @return the partial
*/
protected ReadablePartial getReadablePartial() {
return iPartial;
}
/**
* Gets the partial that this property belongs to.
*
* @return the partial
*/
public Partial getPartial() {
return iPartial;
}
/**
* Gets the value of this field.
*
* @return the field value
*/
public int get() {
return iPartial.getValue(iFieldIndex);
}
//-----------------------------------------------------------------------
/**
* Adds to the value of this field in a copy of this Partial.
* <p>
* The value will be added to this field. If the value is too large to be
* added solely to this field then it will affect larger fields.
* Smaller fields are unaffected.
* <p>
* If the result would be too large, beyond the maximum year, then an
* IllegalArgumentException is thrown.
* <p>
* The Partial attached to this property is unchanged by this call.
* Instead, a new instance is returned.
*
* @param valueToAdd the value to add to the field in the copy
* @return a copy of the Partial with the field value changed
* @throws IllegalArgumentException if the value isn't valid
*/
public Partial addToCopy(int valueToAdd) {
int[] newValues = iPartial.getValues();
newValues = getField().add(iPartial, iFieldIndex, newValues, valueToAdd);
return new Partial(iPartial, newValues);
}
/**
* Adds to the value of this field in a copy of this Partial wrapping
* within this field if the maximum value is reached.
* <p>
* The value will be added to this field. If the value is too large to be
* added solely to this field then it wraps within this field.
* Other fields are unaffected.
* <p>
* For example,
* <code>2004-12-20</code> addWrapField one month returns <code>2004-01-20</code>.
* <p>
* The Partial attached to this property is unchanged by this call.
* Instead, a new instance is returned.
*
* @param valueToAdd the value to add to the field in the copy
* @return a copy of the Partial with the field value changed
* @throws IllegalArgumentException if the value isn't valid
*/
public Partial addWrapFieldToCopy(int valueToAdd) {
int[] newValues = iPartial.getValues();
newValues = getField().addWrapField(iPartial, iFieldIndex, newValues, valueToAdd);
return new Partial(iPartial, newValues);
}
//-----------------------------------------------------------------------
/**
* Sets this field in a copy of the Partial.
* <p>
* The Partial attached to this property is unchanged by this call.
* Instead, a new instance is returned.
*
* @param value the value to set the field in the copy to
* @return a copy of the Partial with the field value changed
* @throws IllegalArgumentException if the value isn't valid
*/
public Partial setCopy(int value) {
int[] newValues = iPartial.getValues();
newValues = getField().set(iPartial, iFieldIndex, newValues, value);
return new Partial(iPartial, newValues);
}
/**
* Sets this field in a copy of the Partial to a parsed text value.
* <p>
* The Partial attached to this property is unchanged by this call.
* Instead, a new instance is returned.
*
* @param text the text value to set
* @param locale optional locale to use for selecting a text symbol
* @return a copy of the Partial with the field value changed
* @throws IllegalArgumentException if the text value isn't valid
*/
public Partial setCopy(String text, Locale locale) {
int[] newValues = iPartial.getValues();
newValues = getField().set(iPartial, iFieldIndex, newValues, text, locale);
return new Partial(iPartial, newValues);
}
/**
* Sets this field in a copy of the Partial to a parsed text value.
* <p>
* The Partial attached to this property is unchanged by this call.
* Instead, a new instance is returned.
*
* @param text the text value to set
* @return a copy of the Partial with the field value changed
* @throws IllegalArgumentException if the text value isn't valid
*/
public Partial setCopy(String text) {
return setCopy(text, null);
}
//-----------------------------------------------------------------------
/**
* Returns a new Partial with this field set to the maximum value
* for this field.
* <p>
* The Partial attached to this property is unchanged by this call.
*
* @return a copy of the Partial with this field set to its maximum
* @since 1.2
*/
public Partial withMaximumValue() {
return setCopy(getMaximumValue());
}
/**
* Returns a new Partial with this field set to the minimum value
* for this field.
* <p>
* The Partial attached to this property is unchanged by this call.
*
* @return a copy of the Partial with this field set to its minimum
* @since 1.2
*/
public Partial withMinimumValue() {
return setCopy(getMinimumValue());
}
}
}