/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.internal.xr;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.persistence.exceptions.DynamicException;
public class XRFieldInfo {
protected HashMap<String, Index> fieldInfo = new HashMap<String, Index>();
public XRFieldInfo() {
super();
}
public int numFields() {
return fieldInfo.size();
}
public void addFieldInfo(String fieldName, int idx) {
fieldInfo.put(fieldName, new Index(idx));
}
public int getFieldIdx(String fieldName) {
Index i = fieldInfo.get(fieldName);
if (i == null) {
throw DynamicException.invalidPropertyName(null, fieldName);
}
return i.idx;
}
public String getFieldName(int fieldIdx) {
String fieldName = null;
for (Map.Entry<String, Index> me : fieldInfo.entrySet()) {
if (me.getValue().idx == fieldIdx) {
fieldName = me.getKey();
break;
}
}
return fieldName;
}
// Made static final for performance reasons.
private static final class Index {
int idx;
public Index(int idx) {
this.idx = idx;
}
}
}