/*
* Copyright 2010, 2011, 2012 mapsforge.org
*
* This program 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.
*
* This program 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 <http://www.gnu.org/licenses/>.
*/
package org.mapsforge.core.model;
import java.io.Serializable;
/**
* A tag represents an immutable key-value pair.
*/
public class Tag implements Serializable {
private static final char KEY_VALUE_SEPARATOR = '=';
private static final long serialVersionUID = 1L;
/**
* The key of this tag.
*/
public final String key;
/**
* The value of this tag.
*/
public final String value;
/**
* @param tag
* the textual representation of the tag.
*/
public Tag(String tag) {
this(tag, tag.indexOf(KEY_VALUE_SEPARATOR));
}
/**
* @param key
* the key of the tag.
* @param value
* the value of the tag.
*/
public Tag(String key, String value) {
this.key = key;
this.value = value;
}
private Tag(String tag, int splitPosition) {
this(tag.substring(0, splitPosition), tag.substring(splitPosition + 1));
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
} else if (!(obj instanceof Tag)) {
return false;
}
Tag other = (Tag) obj;
if (this.key == null) {
if (other.key != null) {
return false;
}
} else if (!this.key.equals(other.key)) {
return false;
} else if (this.value == null) {
if (other.value != null) {
return false;
}
} else if (!this.value.equals(other.value)) {
return false;
}
return true;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((this.key == null) ? 0 : this.key.hashCode());
result = prime * result + ((this.value == null) ? 0 : this.value.hashCode());
return result;
}
@Override
public String toString() {
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("key=");
stringBuilder.append(this.key);
stringBuilder.append(", value=");
stringBuilder.append(this.value);
return stringBuilder.toString();
}
}