/*
Pureport, a report generator for Java
Copyright (C) 2011 Maurice Perry <maurice@perry.ch>
Project Web Site: http://code.google.com/p/pureport/
This program 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.
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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.librebiz.pureport.definition;
import java.util.List;
import org.librebiz.pureport.context.Forward;
import org.librebiz.pureport.context.ReportContext;
import org.librebiz.pureport.context.TextBuilder;
public class Expression implements TextElement {
private String expression;
private boolean pass2;
public Expression(String expression, boolean pass2) {
this.expression = expression;
this.pass2 = pass2;
}
public String getExpression() {
return expression;
}
public void render(ReportContext context, TextBuilder builder,
List<Forward> fwds) {
if (pass2) {
if (fwds == null) {
builder.append('?');
} else {
int index = builder.length();
builder.append('?');
fwds.add(new Forward(builder, index, expression));
}
} else {
String value = context.evaluate(expression, String.class);
if (value != null) {
builder.append(value);
}
}
}
}