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    • com.mitchellbosecke.pebble.node.expression.ContextVariableExpression Maven / Gradle / Ivy

    /*******************************************************************************
 * This file is part of Pebble.
 * 
    
 * Copyright (c) 2014 by Mitchell Bösecke
 * 
    
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 ******************************************************************************/
package com.mitchellbosecke.pebble.node.expression;

import com.mitchellbosecke.pebble.error.PebbleException;
import com.mitchellbosecke.pebble.error.RootAttributeNotFoundException;
import com.mitchellbosecke.pebble.extension.NodeVisitor;
import com.mitchellbosecke.pebble.template.EvaluationContext;
import com.mitchellbosecke.pebble.template.PebbleTemplateImpl;
import com.mitchellbosecke.pebble.template.ScopeChain;

public class ContextVariableExpression implements Expression {

    protected final String name;

    private final int lineNumber;

    public ContextVariableExpression(String name, int lineNumber) {
        this.name = name;
        this.lineNumber = lineNumber;
    }

    @Override
    public void accept(NodeVisitor visitor) {
        visitor.visit(this);
    }

    public String getName() {
        return name;
    }

    @Override
    public Object evaluate(PebbleTemplateImpl self, EvaluationContext context) throws PebbleException {
        ScopeChain scopeChain = context.getScopeChain();
        Object result = scopeChain.get(name);
        if (result == null && context.isStrictVariables() && !scopeChain.containsKey(name)) {
            throw new RootAttributeNotFoundException(null, String.format(
                    "Root attribute [%s] does not exist or can not be accessed and strict variables is set to true.",
                    this.name), this.name, this.lineNumber, self.getName());
        }
        return result;
    }

    @Override
    public int getLineNumber() {
        return lineNumber;
    }

}
    
    
    
    

    




    
    
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