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Clojure.java
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/
Clojure.java
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package mikera.cljutils;
import clojure.lang.RT;
import clojure.lang.Symbol;
import clojure.lang.Var;
/**
* Class containing static utility methods for Java->Clojure interop
*
* @author Mike
*
*/
public class Clojure {
public static final Var REQUIRE=var("clojure.core", "require");
public static final Var META=var("clojure.core", "meta");
public static final Var EVAL=var("clojure.core", "eval");
public static final Var READ_STRING=var("clojure.core", "read-string");
/**
* Require a namespace by name, loading it if necessary.
*
* Calls clojure.core/require
*
* @param nsName
* @return
*/
public static Object require(String nsName) {
return REQUIRE.invoke(Symbol.intern(nsName));
}
public static Object readString(String s) {
return READ_STRING.invoke(s);
}
/**
* Looks up a var by name in the clojure.core namespace.
*
* The var can subsequently be invoked if it is a function.
*
* @param varName
* @return
*/
public static Var var(String varName) {
return var("clojure.core",varName);
}
/**
* Looks up a var by name in the given namespace.
*
* The var can subsequently be invoked if it is a function.
* @param nsName
* @param varName
* @return
*/
public static Var var(String nsName, String varName) {
return RT.var(nsName,varName);
}
/**
* Evaluates a String, which should contain valid Clojure code.
*
* @param string
* @return
*/
public static Object eval(String string) {
return EVAL.invoke(readString(string));
}
}