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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.vespa.indexinglanguage.expressions;
import com.yahoo.document.DataType;
/**
* @author Simon Thoresen Hult
*/
public final class SetVarExpression extends Expression {
private final String varName;
public SetVarExpression(String varName) {
super(UnresolvedDataType.INSTANCE);
this.varName = varName;
}
public String getVariableName() {
return varName;
}
@Override
protected void doExecute(ExecutionContext context) {
context.setVariable(varName, context.getValue());
}
@Override
protected void doVerify(VerificationContext context) {
DataType next = context.getValueType();
DataType prev = context.getVariable(varName);
if (prev != null && !prev.equals(next)) {
throw new VerificationException(this, "Attempting to assign conflicting types to variable '" + varName +
"', " + prev.getName() + " vs " + next.getName());
}
context.setVariable(varName, next);
}
@Override
public DataType createdOutputType() {
return null;
}
@Override
public String toString() {
return "set_var " + varName;
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof SetVarExpression rhs)) return false;
if (!varName.equals(rhs.varName)) return false;
return true;
}
@Override
public int hashCode() {
return getClass().hashCode() + varName.hashCode();
}
}
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