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Globals.java
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Globals.java
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package com.laytonsmith.core;
import com.laytonsmith.core.constructs.CNull;
import com.laytonsmith.core.constructs.Construct;
import java.util.HashMap;
import java.util.Map;
/**
* Provides a global registry for values. This is used by the import/export system.
*/
public final class Globals {
private Globals() {
}
private static final Map<String, Construct> global_construct = new HashMap<>();
/**
* Sets a variable in the global registry.
*
* @param name The value name
* @param value The value itself
*/
public static synchronized void SetGlobal(String name, Construct value) {
Map<String, Construct> vars = global_construct; // (HashMap<String, Construct>)env.get("global_construct");
if(value instanceof CNull) {
vars.remove(name);
} else {
vars.put(name, value);
}
}
/**
* Returns a value previously stored in the global registry. If the value hasn't been set before, CNull is returned.
* Regardless, a valid Construct is always returned, never null.
*
* @param name The name of the value to return.
* @return the construct stored at this name, or CNull if none exists
*/
public static synchronized Construct GetGlobalConstruct(String name) {
Map<String, Construct> vars = global_construct; // (HashMap<String, Construct>)env.get("global_construct");
return vars.getOrDefault(name, CNull.NULL);
}
/**
* Clears out all the values in the registry.
*/
public static synchronized void clear() {
global_construct.clear();
}
}