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LongCoercion.java
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LongCoercion.java
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package org.graylog.plugins.messageprocessor.functions;
import com.google.common.primitives.Longs;
import org.graylog.plugins.messageprocessor.EvaluationContext;
import org.graylog.plugins.messageprocessor.ast.expressions.Expression;
import org.graylog.plugins.messageprocessor.ast.functions.Function;
import org.graylog.plugins.messageprocessor.ast.functions.FunctionDescriptor;
import org.graylog2.plugin.Message;
import java.util.Map;
import static com.google.common.base.MoreObjects.firstNonNull;
import static com.google.common.collect.ImmutableList.of;
import static org.graylog.plugins.messageprocessor.ast.functions.ParameterDescriptor.param;
import static org.graylog.plugins.messageprocessor.ast.functions.ParameterDescriptor.object;
public class LongCoercion implements Function<Long> {
public static final String NAME = "long";
private static final String VALUE = "value";
private static final String DEFAULT = "default";
@Override
public Long evaluate(Map<String, Expression> args, EvaluationContext context, Message message) {
final Expression value = args.get(VALUE);
final Object evaluated = value.evaluate(context, message);
return (Long) firstNonNull(Longs.tryParse(evaluated.toString()), args.get(DEFAULT).evaluate(context, message));
}
@Override
public FunctionDescriptor<Long> descriptor() {
return FunctionDescriptor.<Long>builder()
.name(NAME)
.returnType(Long.class)
.params(of(
object(VALUE),
param().name(DEFAULT).type(Long.class).build()
))
.build();
}
}