/*
* Copyright © 2010-2011 Rebecca G. Bettencourt / Kreative Software
* <p>
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* <a href="http://www.mozilla.org/MPL/">http://www.mozilla.org/MPL/</a>
* <p>
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
* License for the specific language governing rights and limitations
* under the License.
* <p>
* Alternatively, the contents of this file may be used under the terms
* of the GNU Lesser General Public License (the "LGPL License"), in which
* case the provisions of LGPL License are applicable instead of those
* above. If you wish to allow use of your version of this file only
* under the terms of the LGPL License and not to allow others to use
* your version of this file under the MPL, indicate your decision by
* deleting the provisions above and replace them with the notice and
* other provisions required by the LGPL License. If you do not delete
* the provisions above, a recipient may use your version of this file
* under either the MPL or the LGPL License.
* @since KSFL 1.2
* @author Rebecca G. Bettencourt, Kreative Software
*/
package com.kreative.binpack;
import java.util.Map;
public class DFFieldExpression implements DFExpression {
private DFFieldExpression parent;
private Object key;
public DFFieldExpression(Object key) {
this.parent = null;
this.key = key;
}
public DFFieldExpression(DFFieldExpression parent, Object key) {
this.parent = parent;
this.key = key;
}
public int evaluate() {
return 0;
}
public Map<?,?> evaluateToMap(Map<?,?> fieldValues, BitInputStream in, long length) {
Map<?,?> map = (parent != null) ? parent.evaluateToMap(fieldValues, in, length) : fieldValues;
if (map != null && map.containsKey(key) && map.get(key) instanceof Map) {
return (Map<?,?>)map.get(key);
} else {
return null;
}
}
public int evaluate(Map<?,?> fieldValues, BitInputStream in, long length) {
Map<?,?> map = (parent != null) ? parent.evaluateToMap(fieldValues, in, length) : fieldValues;
if (map != null && map.containsKey(key) && map.get(key) instanceof Number) {
return ((Number)map.get(key)).intValue();
} else {
return 0;
}
}
public Map<?,?> evaluateToMap(Map<?,?> fieldValues, BitOutputStream out) {
Map<?,?> map = (parent != null) ? parent.evaluateToMap(fieldValues, out) : fieldValues;
if (map != null && map.containsKey(key) && map.get(key) instanceof Map) {
return (Map<?,?>)map.get(key);
} else {
return null;
}
}
public int evaluate(Map<?,?> fieldValues, BitOutputStream out) {
Map<?,?> map = (parent != null) ? parent.evaluateToMap(fieldValues, out) : fieldValues;
if (map != null && map.containsKey(key) && map.get(key) instanceof Number) {
return ((Number)map.get(key)).intValue();
} else {
return 0;
}
}
public String toString() {
StringBuffer s = new StringBuffer();
if (parent != null) {
s.append(parent.toString());
s.append(".");
}
s.append(key.toString());
return s.toString();
}
}