org.immutables.fixture.modifiable.ModifiableGenericHolder Maven / Gradle / Ivy
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package org.immutables.fixture.modifiable;
import com.google.common.base.MoreObjects;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import javax.annotation.Nullable;
import javax.annotation.ParametersAreNonnullByDefault;
import javax.annotation.concurrent.NotThreadSafe;
import org.immutables.value.Generated;
/**
* A modifiable implementation of the {@link GenericHolder GenericHolder} type.
* Use the {@link #create()} static factory methods to create new instances.
* Use the {@link #toImmutable()} method to convert to canonical immutable instances.
*
ModifiableGenericHolder is not thread-safe
* @param generic parameter T
* @see ImmutableGenericHolder
*/
@Generated(from = "GenericHolder", generator = "Modifiables")
@SuppressWarnings({"all"})
@ParametersAreNonnullByDefault
@javax.annotation.processing.Generated({"Modifiables.generator", "GenericHolder"})
@NotThreadSafe
public final class ModifiableGenericHolder implements GenericHolder {
private static final long INIT_BIT_MANDATORY = 0x1L;
private long initBits = 0x1L;
private T mandatory;
private @Nullable T optional;
private ModifiableGenericHolder() {}
/**
* Construct a modifiable instance of {@code GenericHolder}.
* @param generic parameter T
* @return A new modifiable instance
*/
public static ModifiableGenericHolder create() {
return new ModifiableGenericHolder<>();
}
/**
* @return value of {@code mandatory} attribute
*/
@Override
public final T mandatory() {
if (!mandatoryIsSet()) {
checkRequiredAttributes();
}
return mandatory;
}
/**
* @return value of {@code optional} attribute, may be {@code null}
*/
@Override
public final @Nullable T optional() {
return optional;
}
/**
* Clears the object by setting all attributes to their initial values.
* @return {@code this} for use in a chained invocation
*/
@CanIgnoreReturnValue
public ModifiableGenericHolder clear() {
initBits = 0x1L;
mandatory = null;
optional = null;
return this;
}
/**
* Fill this modifiable instance with attribute values from the provided {@link GenericHolder} instance.
* Regular attribute values will be overridden, i.e. replaced with ones of an instance.
* Any of the instance's absent optional values will not be copied (will not override current values).
* @param instance The instance from which to copy values
* @return {@code this} for use in a chained invocation
*/
public ModifiableGenericHolder from(GenericHolder instance) {
Objects.requireNonNull(instance, "instance");
if (instance instanceof ModifiableGenericHolder) {
from((ModifiableGenericHolder) instance);
return this;
}
setMandatory(instance.mandatory());
@Nullable T optionalValue = instance.optional();
if (optionalValue != null) {
setOptional(optionalValue);
}
return this;
}
/**
* Fill this modifiable instance with attribute values from the provided {@link GenericHolder} instance.
* Regular attribute values will be overridden, i.e. replaced with ones of an instance.
* Any of the instance's absent optional values will not be copied (will not override current values).
* @param instance The instance from which to copy values
* @return {@code this} for use in a chained invocation
*/
public ModifiableGenericHolder from(ModifiableGenericHolder instance) {
Objects.requireNonNull(instance, "instance");
if (instance.mandatoryIsSet()) {
setMandatory(instance.mandatory());
}
@Nullable T optionalValue = instance.optional();
if (optionalValue != null) {
setOptional(optionalValue);
}
return this;
}
/**
* Assigns a value to the {@link GenericHolder#mandatory() mandatory} attribute.
* @param mandatory The value for mandatory
* @return {@code this} for use in a chained invocation
*/
@CanIgnoreReturnValue
public ModifiableGenericHolder setMandatory(T mandatory) {
this.mandatory = Objects.requireNonNull(mandatory, "mandatory");
initBits &= ~INIT_BIT_MANDATORY;
return this;
}
/**
* Assigns a value to the {@link GenericHolder#optional() optional} attribute.
* @param optional The value for optional, can be {@code null}
* @return {@code this} for use in a chained invocation
*/
@CanIgnoreReturnValue
public ModifiableGenericHolder setOptional(@Nullable T optional) {
this.optional = optional;
return this;
}
/**
* Returns {@code true} if the required attribute {@link GenericHolder#mandatory() mandatory} is set.
* @return {@code true} if set
*/
public final boolean mandatoryIsSet() {
return (initBits & INIT_BIT_MANDATORY) == 0;
}
/**
* Reset an attribute to its initial value.
* @return {@code this} for use in a chained invocation
*/
@CanIgnoreReturnValue
public final ModifiableGenericHolder unsetMandatory() {
initBits |= INIT_BIT_MANDATORY;
mandatory = null;
return this;
}
/**
* Returns {@code true} if all required attributes are set, indicating that the object is initialized.
* @return {@code true} if set
*/
public final boolean isInitialized() {
return initBits == 0;
}
private void checkRequiredAttributes() {
if (!isInitialized()) {
throw new IllegalStateException(formatRequiredAttributesMessage());
}
}
private String formatRequiredAttributesMessage() {
List attributes = new ArrayList<>();
if (!mandatoryIsSet()) attributes.add("mandatory");
return "GenericHolder is not initialized, some of the required attributes are not set " + attributes;
}
/**
* Converts to {@link ImmutableGenericHolder ImmutableGenericHolder}.
* @return An immutable instance of GenericHolder
*/
public final ImmutableGenericHolder toImmutable() {
checkRequiredAttributes();
return ImmutableGenericHolder.copyOf(this);
}
/**
* This instance is equal to all instances of {@code ModifiableGenericHolder} that have equal attribute values.
* An uninitialized instance is equal only to itself.
* @return {@code true} if {@code this} is equal to {@code another} instance
*/
@Override
public boolean equals(@Nullable Object another) {
if (this == another) return true;
if (!(another instanceof ModifiableGenericHolder)) return false;
ModifiableGenericHolder other = (ModifiableGenericHolder) another;
if (!isInitialized() || !other.isInitialized()) {
return false;
}
return equalTo(other);
}
private boolean equalTo(ModifiableGenericHolder another) {
return mandatory.equals(another.mandatory)
&& Objects.equals(optional, another.optional);
}
/**
* Computes a hash code from attributes: {@code mandatory}, {@code optional}.
* @return hashCode value
*/
@Override
public int hashCode() {
int h = 5381;
h += (h << 5) + mandatory.hashCode();
h += (h << 5) + Objects.hashCode(optional);
return h;
}
/**
* Generates a string representation of this {@code GenericHolder}.
* If uninitialized, some attribute values may appear as question marks.
* @return A string representation
*/
@Override
public String toString() {
return MoreObjects.toStringHelper("ModifiableGenericHolder")
.add("mandatory", mandatoryIsSet() ? mandatory() : "?")
.add("optional", optional())
.toString();
}
}