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// Copyright Vespa.ai. 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;
import com.yahoo.document.datatypes.LongFieldValue;
import java.time.Instant;
/**
* Converts ISO-8601 formatted date string to UNIX Epoch Time in seconds
*
* @author bergum
*/
public class ToEpochSecondExpression extends Expression {
public ToEpochSecondExpression() {
super(DataType.STRING); //only accept string input
}
@Override
protected void doExecute(ExecutionContext context) {
String inputString = String.valueOf(context.getValue());
long epochTime = Instant.parse(inputString).getEpochSecond();
context.setValue(new LongFieldValue(epochTime));
}
@Override
protected void doVerify(VerificationContext context) {
context.setValueType(createdOutputType());
}
@Override
public DataType createdOutputType() {
return DataType.LONG;
}
@Override
public String toString() {
return "to_epoch_second";
}
@Override
public boolean equals(Object obj) {
return obj instanceof ToEpochSecondExpression;
}
@Override
public int hashCode() {
return getClass().hashCode();
}
}
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