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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.document.select.rule;
import com.yahoo.document.BucketIdFactory;
import com.yahoo.document.select.BucketSet;
import com.yahoo.document.select.Context;
import com.yahoo.document.select.Visitor;
/**
* @author Simon Thoresen Hult
*/
public class VariableNode implements ExpressionNode {
private String value;
public VariableNode(String value) {
this.value = value;
}
public Object getValue() {
return value;
}
public VariableNode setValue(String value) {
this.value = value;
return this;
}
@Override
public BucketSet getBucketSet(BucketIdFactory factory) {
return null;
}
@Override
public Object evaluate(Context context) {
Object o = context.getVariables().get(value);
if (o == null) {
throw new IllegalArgumentException("Variable " + value + " was not set in the variable list");
}
return o;
}
@Override
public void accept(Visitor visitor) {
visitor.visit(this);
}
@Override
public String toString() {
return "$" + value;
}
}
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