/*
* Copyright 2013 Martin Smock <smock.martin@gmail.com>
*
* 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 li.strolch.model.timevalue.impl;
import java.io.Serializable;
import li.strolch.utils.dbc.DBC;
/**
* Wrapper for java.util.String object defining a inverse to support algebraic operations.
*
* @author Martin Smock <smock.martin@gmail.com>
*/
public class AString implements Serializable {
private static final long serialVersionUID = 1L;
private final String string;
private final boolean inverse;
public AString(final String string) {
DBC.PRE.assertNotNull("Value may not be null!", string);
DBC.PRE.assertFalse("Comma not allowed in value!", string.contains(","));
this.string = string;
this.inverse = false;
}
public AString(final String string, final boolean inverse) {
DBC.PRE.assertNotNull("Value may not be null!", string);
DBC.PRE.assertFalse("Comma not allowed in value!", string.contains(","));
this.string = string;
this.inverse = inverse;
}
public String getString() {
return this.string;
}
public boolean isInverse() {
return this.inverse;
}
public AString getInverse() {
return new AString(this.string, !this.inverse);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + (this.inverse ? 1231 : 1237);
result = prime * result + ((this.string == null) ? 0 : this.string.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
AString other = (AString) obj;
if (this.inverse != other.inverse) {
return false;
}
if (this.string == null) {
if (other.string != null) {
return false;
}
} else if (!this.string.equals(other.string)) {
return false;
}
return true;
}
@SuppressWarnings("nls")
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("AString [string=");
sb.append(this.string);
sb.append(", inverse=");
sb.append(this.inverse);
sb.append("]");
return sb.toString();
}
}