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Conditional values simplify conditional logic and get rid of if-statements in the code
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///////////////////////////////////////////////////////////////////////////////////////////////////
// Conditional values simplify conditional logic and get rid of if-statements in the code.
// Copyright (C) 2016 Dmitry Shapovalov.
//
// This file is part of conditional values.
//
// Conditional values is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Conditional values is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program. If not, see
* Builder to create {@link ru.d_shap.conditionalvalues.ConditionSet} objects.
*
*
* Objects of this class are reusable. After calling the {@link #build()} or {@link #build(boolean)}
* methods this object can be used to create another object.
*
*
* @author Dmitry Shapovalov
*/
public final class ConditionSetBuilder {
private final Map _conditions;
private ConditionSetBuilder() {
super();
_conditions = new HashMap<>();
}
/**
* Create new builder instance.
*
* @return new builder instance.
*/
public static ConditionSetBuilder newInstance() {
return new ConditionSetBuilder();
}
/**
* Add the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder addCondition(final String name, final String value) {
doAddCondition(name, value);
return this;
}
/**
* Add the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder addCondition(final String name, final boolean value) {
doAddCondition(name, value);
return this;
}
/**
* Add the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder addCondition(final String name, final char value) {
doAddCondition(name, value);
return this;
}
/**
* Add the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder addCondition(final String name, final int value) {
doAddCondition(name, value);
return this;
}
/**
* Add the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder addCondition(final String name, final long value) {
doAddCondition(name, value);
return this;
}
/**
* Add the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder addCondition(final String name, final float value) {
doAddCondition(name, value);
return this;
}
/**
* Add the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder addCondition(final String name, final double value) {
doAddCondition(name, value);
return this;
}
/**
* Add the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder addCondition(final String name, final Object value) {
doAddCondition(name, value);
return this;
}
/**
* Add all conditions from the specified {@link ru.d_shap.conditionalvalues.ConditionSet} object.
*
* @param conditionSet the specified {@link ru.d_shap.conditionalvalues.ConditionSet} object.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder addConditions(final ConditionSet conditionSet) {
if (conditionSet != null) {
Iterator conditionNameIterator = conditionSet.nameIterator();
while (conditionNameIterator.hasNext()) {
String conditionName = conditionNameIterator.next();
Object conditionValue = conditionSet.getValue(conditionName);
doAddCondition(conditionName, conditionValue);
}
}
return this;
}
private void doAddCondition(final String name, final Object value) {
if (name != null) {
if (value == null) {
_conditions.remove(name);
} else {
_conditions.put(name, value);
}
}
}
/**
* Remove the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder removeCondition(final String name, final String value) {
doRemoveCondition(name, value);
return this;
}
/**
* Remove the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder removeCondition(final String name, final boolean value) {
doRemoveCondition(name, value);
return this;
}
/**
* Remove the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder removeCondition(final String name, final char value) {
doRemoveCondition(name, value);
return this;
}
/**
* Remove the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder removeCondition(final String name, final int value) {
doRemoveCondition(name, value);
return this;
}
/**
* Remove the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder removeCondition(final String name, final long value) {
doRemoveCondition(name, value);
return this;
}
/**
* Remove the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder removeCondition(final String name, final float value) {
doRemoveCondition(name, value);
return this;
}
/**
* Remove the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder removeCondition(final String name, final double value) {
doRemoveCondition(name, value);
return this;
}
/**
* Remove the condition.
*
* @param name condition name.
* @param value condition value.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder removeCondition(final String name, final Object value) {
doRemoveCondition(name, value);
return this;
}
/**
* Remove the condition.
*
* @param name condition name.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder removeCondition(final String name) {
_conditions.remove(name);
return this;
}
/**
* Remove all conditions with the names obtained from the specified
* {@link ru.d_shap.conditionalvalues.ConditionSet} object.
*
* @param conditionSet the specified {@link ru.d_shap.conditionalvalues.ConditionSet} object.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder removeConditionNames(final ConditionSet conditionSet) {
if (conditionSet != null) {
Iterator conditionNameIterator = conditionSet.nameIterator();
while (conditionNameIterator.hasNext()) {
String conditionName = conditionNameIterator.next();
_conditions.remove(conditionName);
}
}
return this;
}
/**
* Remove all conditions with the names and values obtained from the specified
* {@link ru.d_shap.conditionalvalues.ConditionSet} object.
*
* @param conditionSet the specified {@link ru.d_shap.conditionalvalues.ConditionSet} object.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder removeConditionValues(final ConditionSet conditionSet) {
if (conditionSet != null) {
Iterator conditionNameIterator = conditionSet.nameIterator();
while (conditionNameIterator.hasNext()) {
String conditionName = conditionNameIterator.next();
Object conditionValue = conditionSet.getValue(conditionName);
doRemoveCondition(conditionName, conditionValue);
}
}
return this;
}
private void doRemoveCondition(final String name, final Object value) {
Object oldValue = _conditions.get(name);
if (oldValue != null && oldValue.equals(value)) {
_conditions.remove(name);
}
}
/**
* Clear the builder.
*
* @return current object for the method chaining.
*/
public ConditionSetBuilder clear() {
_conditions.clear();
return this;
}
/**
* Create new {@link ru.d_shap.conditionalvalues.ConditionSet} object and clear the builder.
*
* @return {@link ru.d_shap.conditionalvalues.ConditionSet} object.
*/
public ConditionSet build() {
return build(true);
}
/**
* Create new {@link ru.d_shap.conditionalvalues.ConditionSet} object.
*
* @param clear true to clear the builder.
*
* @return {@link ru.d_shap.conditionalvalues.ConditionSet} object.
*/
public ConditionSet build(final boolean clear) {
ConditionSet conditionSet = new ConditionSet(_conditions);
if (clear) {
clear();
}
return conditionSet;
}
}
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