/**********************************************************************
* Copyright (c) 2014 HubSpot Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**********************************************************************/
package com.hubspot.jinjava.tree;
import java.util.Objects;
import org.apache.commons.lang3.StringUtils;
import com.hubspot.jinjava.interpret.JinjavaInterpreter;
import com.hubspot.jinjava.interpret.UnknownTokenException;
import com.hubspot.jinjava.lib.filter.EscapeFilter;
import com.hubspot.jinjava.tree.output.OutputNode;
import com.hubspot.jinjava.tree.output.RenderedOutputNode;
import com.hubspot.jinjava.tree.parse.ExpressionToken;
import com.hubspot.jinjava.util.Logging;
public class ExpressionNode extends Node {
private static final long serialVersionUID = 341642231109911346L;
private final ExpressionToken master;
public ExpressionNode(ExpressionToken token) {
super(token, token.getLineNumber());
master = token;
}
@Override
public OutputNode render(JinjavaInterpreter interpreter) {
Object var = interpreter.resolveELExpression(master.getExpr(), getLineNumber());
if (var == null && interpreter.getConfig().isFailOnUnknownTokens()) {
throw new UnknownTokenException(master.getExpr(), getLineNumber());
}
String result = Objects.toString(var, "");
if (!StringUtils.equals(result, master.getImage()) && StringUtils.contains(result, "{{")) {
try {
result = interpreter.renderFlat(result);
} catch (Exception e) {
Logging.ENGINE_LOG.warn("Error rendering variable node result", e);
}
}
if (interpreter.getContext().isAutoEscape()) {
result = EscapeFilter.escapeHtmlEntities(result);
}
return new RenderedOutputNode(result);
}
@Override
public String toString() {
return master.toString();
}
@Override
public String getName() {
return getClass().getSimpleName();
}
}