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Java Source | 1997-05-20 | 3.8 KB | 113 lines |
- /*
- * @(#)Compiler.java 1.3 97/01/20
- *
- * Copyright (c) 1995, 1996 Sun Microsystems, Inc. All Rights Reserved.
- *
- * This software is the confidential and proprietary information of Sun
- * Microsystems, Inc. ("Confidential Information"). You shall not
- * disclose such Confidential Information and shall use it only in
- * accordance with the terms of the license agreement you entered into
- * with Sun.
- *
- * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
- * SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
- * PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
- * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
- * THIS SOFTWARE OR ITS DERIVATIVES.
- *
- * CopyrightVersion 1.1_beta
- *
- */
-
- package java.lang;
-
- /**
- * The <code>Compiler</code> class is provided to support
- * Java-to-native-code compilers and related services. By design, the
- * <code>Compiler</code> class does nothing; it serves as a
- * placeholder for a JIT compiler implementation.
- * <p>
- * When the Java Virtual Machine first starts, it determines if the
- * system property <code>java.compiler</code> exists. (System
- * properties are accessible through <code>getProperty</code> and ,
- * a method defined by the <code>System</code> class.) If so, it is
- * assumed to be the name of a library (with a platform-dependent
- * exact location and type); the <code>loadLibrary</code> method in
- * class <code>System</code> is called to load that library. If this
- * loading succeeds, the function named
- * <code>java_lang_Compiler_start()</code> in that library is called.
- * <p>
- * If no compiler is available, these methods do nothing.
- *
- * @author Frank Yellin
- * @version 1.3, 01/20/97
- * @see java.lang.System#getProperty(java.lang.String)
- * @see java.lang.System#getProperty(java.lang.String, java.lang.String)
- * @see java.lang.System#loadLibrary(java.lang.String)
- * @since JDK1.0
- */
- public final class Compiler {
- private Compiler() {} // don't make instances
-
- private static native void initialize();
-
- static {
- try {
- String library = System.getProperty("java.compiler");
- if (library != null) {
- System.loadLibrary(library);
- initialize();
- }
- } catch (Throwable e) {
- }
- }
-
- /**
- * Compiles the specified class.
- *
- * @param clazz a class.
- * @return <code>true</code> if the compilation succeeded;
- * <code>false</code> if the compilation failed or no compiler
- * is available.
- * @since JDK1.0
- */
- public static native boolean compileClass(Class clazz);
-
- /**
- * Compiles all classes whose name matches the specified string.
- *
- * @param string the name of the classes to compile.
- * @return <code>true</code> if the compilation succeeded;
- * <code>false</code> if the compilation failed or no compiler
- * is available.
- * @since JDK1.0
- */
- public static native boolean compileClasses(String string);
-
- /**
- * Examines the argument type and its fields and perform some documented
- * operation. No specific operations are required.
- *
- * @param any an argument.
- * @return a compiler-specific value, or <code>null</code> if no compiler
- * is available.
- * @since JDK1.0
- */
- public static native Object command(Object any);
-
- /**
- * Cause the Compiler to resume operation.
- *
- * @since JDK1.0
- */
- public static native void enable();
-
- /**
- * Cause the Compiler to cease operation.
- *
- * @since JDK1.0
- */
- public static native void disable();
- }
-