io.nosqlbench.virtdata.library.basics.shared.stateful.LoadDouble Maven / Gradle / Ivy
package io.nosqlbench.virtdata.library.basics.shared.stateful;
import io.nosqlbench.virtdata.api.annotations.Categories;
import io.nosqlbench.virtdata.api.annotations.Category;
import io.nosqlbench.virtdata.api.annotations.Example;
import io.nosqlbench.virtdata.api.annotations.ThreadSafeMapper;
import io.nosqlbench.virtdata.library.basics.core.threadstate.SharedState;
import java.util.HashMap;
import java.util.function.Function;
@Categories(Category.state)
@ThreadSafeMapper
public class LoadDouble implements Function {
private final String name;
private final Function nameFunc;
private final double defaultValue;
@Example({"LoadDouble('foo')","for the current thread, load a double value from the named variable."})
public LoadDouble(String name) {
this.name = name;
this.nameFunc=null;
this.defaultValue=0.0D;
}
@Example({"LoadDouble('foo',23D)","for the current thread, load a double value from the named variable," +
"or the default value if the named variable is not defined."})
public LoadDouble(String name, double defaultValue) {
this.name = name;
this.nameFunc=null;
this.defaultValue=defaultValue;
}
@Example({"LoadDouble(NumberNameToString())","for the current thread, load a double value from the named variable, " +
"where the variable name is provided by a function."})
public LoadDouble(Function nameFunc) {
this.name=null;
this.nameFunc = nameFunc;
this.defaultValue=0.0D;
}
@Example({"LoadDouble(NumberNameToString(),23D)","for the current thread, load a double value from the named variable," +
"where the variable name is provided by a function, or the default value if the named" +
"variable is not defined."})
public LoadDouble(Function nameFunc, double defaultValue) {
this.name=null;
this.nameFunc = nameFunc;
this.defaultValue=defaultValue;
}
@Override
public Double apply(Object o) {
HashMap map = SharedState.tl_ObjectMap.get();
String varname=(nameFunc!=null) ? String.valueOf(nameFunc.apply(o)) : name;
Object value = map.getOrDefault(varname, defaultValue);
return (Double) value;
}
}