com.google.gwt.core.ext.DefaultSelectionProperty Maven / Gradle / Ivy
/*
* Copyright 2009 Google Inc.
*
* 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.google.gwt.core.ext;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.SortedSet;
/**
* Default immutable implementation of SelectionProperty that receives its
* values in its constructor.
*/
public class DefaultSelectionProperty implements SelectionProperty {
private final String currentValue;
private final String fallbackValue;
private final String name;
private final SortedSet possibleValues;
private final Map>> fallbackValueMap;
/**
* Construct a selection property.
*
* @param currentValue current value of this property, must not be null
* @param fallbackValue the fallback value to use, must not be null
* @param name the name of this property, must not be null
* @param possibleValues the set of possible values, must not be null and
* will be returned to callers, so a copy should be passed into this
* ctor if the caller will use this set later
*/
public DefaultSelectionProperty(String currentValue, String fallbackValue,
String name, SortedSet possibleValues) {
this(currentValue, fallbackValue, name, possibleValues, null);
}
/**
* Construct a selection property.
*
* @param currentValue current value of this property, must not be null
* @param fallbackValue the fallback value to use, must not be null
* @param name the name of this property, must not be null
* @param possibleValues the set of possible values, must not be null and
* will be returned to callers, so a copy should be passed into this
* ctor if the caller will use this set later
* @param fallbackValueMap the map propertyValue to fallback values
*/
public DefaultSelectionProperty(String currentValue, String fallbackValue,
String name, SortedSet possibleValues,
Map>> fallbackValueMap) {
assert currentValue != null;
assert fallbackValue != null;
assert name != null;
assert possibleValues != null;
this.currentValue = currentValue;
this.fallbackValue = fallbackValue;
this.name = name;
this.possibleValues = possibleValues;
this.fallbackValueMap = fallbackValueMap;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
DefaultSelectionProperty other = (DefaultSelectionProperty) obj;
return currentValue.equals(other.currentValue)
&& fallbackValue.equals(other.fallbackValue)
&& name.equals(other.name)
&& possibleValues.equals(other.possibleValues);
}
@Override
public String getCurrentValue() {
return currentValue;
}
@Override
public String getFallbackValue() {
return fallbackValue;
}
@Override
public List> getFallbackValues(String value) {
return (null != fallbackValueMap) ? fallbackValueMap.get(value) : null;
}
@Override
public String getName() {
return name;
}
@Override
public SortedSet getPossibleValues() {
return possibleValues;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + currentValue.hashCode();
result = prime * result + fallbackValue.hashCode();
result = prime * result + name.hashCode();
result = prime * result + possibleValues.hashCode();
return result;
}
@Override
public String toString() {
return "SelectionProp " + name + ": " + currentValue + " of "
+ possibleValues.toString() + ", fallback =" + fallbackValue;
}
}