org.mycore.services.fieldquery.MCRFieldBaseValue Maven / Gradle / Ivy
/*
* This file is part of *** M y C o R e ***
* See http://www.mycore.de/ for details.
*
* MyCoRe is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* MyCoRe 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MyCoRe. If not, see .
*/
package org.mycore.services.fieldquery;
import org.jdom2.Element;
import org.mycore.common.MCRConstants;
import org.mycore.common.MCRException;
public class MCRFieldBaseValue {
/**
* The field this value belongs to
*/
protected String fieldName;
/**
* The fields's value, as a String
*/
protected String value;
public MCRFieldBaseValue() {
super();
}
public MCRFieldBaseValue(String name, String value) {
this.fieldName = name;
this.value = value;
}
public void setFieldName(String fieldName) {
if (fieldName == null) {
throw new NullPointerException("field name cannot be null.");
}
this.fieldName = fieldName;
}
/**
* Returns the field this value belongs to
*/
public String getFieldName() {
return fieldName;
}
/**
* Sets or updates the field value
*
* @param value the value
*/
public void setValue(String value) {
this.value = value;
}
/**
* Returns the value of the field as a String
*
* @return the value of the field as a String
*/
public String getValue() {
return value;
}
/**
* Builds a XML representation of this field's value
*
* @return a 'field' element with attribute 'name' and the value as element
* content
*/
public Element buildXML() {
Element eField = new Element("field", MCRConstants.MCR_NAMESPACE);
eField.setAttribute("name", getFieldName());
eField.addContent(value);
return eField;
}
/**
* Parses a XML representation of a field value
*
* @param xml
* the field value as XML element
* @return the parsed MCRFieldValue object
*/
public static MCRFieldBaseValue parseXML(Element xml) {
String name = xml.getAttributeValue("name", "");
String value = xml.getText();
if (name.length() == 0) {
throw new MCRException("Field value attribute 'name' is empty");
}
if (value.length() == 0) {
throw new MCRException("Field value is empty");
}
return new MCRFieldBaseValue(name, value);
}
@Override
public String toString() {
return getFieldName() + " = " + value;
}
}