io.nosqlbench.virtdata.library.basics.shared.stateful.LoadString Maven / Gradle / Ivy

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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 LoadString implements Function {

    private final String name;
    private final Function nameFunc;
    private final String defaultValue;

    @Example({"LoadString('foo','examplevalue')","for the current thread, load a String value from the named variable."})
    public LoadString(String name) {
        this.name = name;
        this.nameFunc=null;
        this.defaultValue="";
    }

    @Example({"LoadString('foo','examplevalue')","for the current thread, load a String value from the named variable," +
            " or the default value if the named variable is not defined."})
    public LoadString(String name, String defaultValue) {
        this.name = name;
        this.nameFunc=null;
        this.defaultValue=defaultValue;
    }

    @Example({"LoadString(NumberNameToString(),'examplevalue')","for the current thread, load a String value from the named variable," +
            " or the default value if the named variable is not defined."})
    public LoadString(Function nameFunc) {
        this.name=null;
        this.nameFunc = nameFunc;
        this.defaultValue="";
    }

    @Example({"LoadString(NumberNameToString(),'examplevalue')","for the current thread, load a String 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 LoadString(Function nameFunc, String defaultValue) {
        this.name=null;
        this.nameFunc = nameFunc;
        this.defaultValue=defaultValue;
    }

    @Override
    public String apply(Object o) {
        String varname=(nameFunc!=null) ? String.valueOf(nameFunc.apply(o)) : name;
        HashMap map = SharedState.tl_ObjectMap.get();
        Object value = map.getOrDefault(varname,defaultValue);
        return (String) value;
    }
}