separating the sun specific functionality into a new module
This commit is contained in:
@@ -0,0 +1,26 @@
|
||||
*.class
|
||||
|
||||
0.*
|
||||
|
||||
#folders#
|
||||
/target
|
||||
/neoDb*
|
||||
/data
|
||||
/src/main/webapp/WEB-INF/classes
|
||||
*/META-INF/*
|
||||
.resourceCache
|
||||
|
||||
# Packaged files #
|
||||
*.jar
|
||||
*.war
|
||||
*.ear
|
||||
|
||||
# Files generated by integration tests
|
||||
*.txt
|
||||
backup-pom.xml
|
||||
/bin/
|
||||
/temp
|
||||
|
||||
#IntelliJ specific
|
||||
.idea/
|
||||
*.iml
|
||||
@@ -0,0 +1,123 @@
|
||||
=========
|
||||
|
||||
## Core Java Cookbooks and Examples
|
||||
|
||||
### Relevant Articles:
|
||||
- [Immutable ArrayList in Java](http://www.baeldung.com/java-immutable-list)
|
||||
- [Java - Reading a Large File Efficiently](http://www.baeldung.com/java-read-lines-large-file)
|
||||
- [Java InputStream to String](http://www.baeldung.com/convert-input-stream-to-string)
|
||||
- [Converting between an Array and a List in Java](http://www.baeldung.com/convert-array-to-list-and-list-to-array)
|
||||
- [Converting between an Array and a Set in Java](http://www.baeldung.com/convert-array-to-set-and-set-to-array)
|
||||
- [Converting between a List and a Set in Java](http://www.baeldung.com/convert-list-to-set-and-set-to-list)
|
||||
- [Convert a Map to an Array, List or Set in Java](http://www.baeldung.com/convert-map-values-to-array-list-set)
|
||||
- [Java – Write to File](http://www.baeldung.com/java-write-to-file)
|
||||
- [Java - Convert File to InputStream](http://www.baeldung.com/convert-file-to-input-stream)
|
||||
- [Java – Random Long, Float, Integer and Double](http://www.baeldung.com/java-generate-random-long-float-integer-double)
|
||||
- [Java – Generate Random String](http://www.baeldung.com/java-random-string)
|
||||
- [Java Scanner](http://www.baeldung.com/java-scanner)
|
||||
- [Java Timer](http://www.baeldung.com/java-timer-and-timertask)
|
||||
- [Java – Byte Array to Writer](http://www.baeldung.com/java-convert-byte-array-to-writer)
|
||||
- [How to Run a Shell Command in Java](http://www.baeldung.com/run-shell-command-in-java)
|
||||
- [MD5 Hashing in Java](http://www.baeldung.com/java-md5)
|
||||
- [Guide to the Java ArrayList](http://www.baeldung.com/java-arraylist)
|
||||
- [Guide to Java Reflection](http://www.baeldung.com/java-reflection)
|
||||
- [A Guide to Java Sockets](http://www.baeldung.com/a-guide-to-java-sockets)
|
||||
- [Convert char to String in Java](http://www.baeldung.com/java-convert-char-to-string)
|
||||
- [Random List Element](http://www.baeldung.com/java-random-list-element)
|
||||
- [Convert String to int or Integer in Java](http://www.baeldung.com/java-convert-string-to-int-or-integer)
|
||||
- [Java – Directory Size](http://www.baeldung.com/java-folder-size)
|
||||
- [Java – Try with Resources](http://www.baeldung.com/java-try-with-resources)
|
||||
- [Guide to the Fork/Join Framework in Java](http://www.baeldung.com/java-fork-join)
|
||||
- [How to Print Screen in Java](http://www.baeldung.com/print-screen-in-java)
|
||||
- [How to Convert String to different data types in Java](http://www.baeldung.com/java-string-conversions)
|
||||
- [Introduction to Java Generics](http://www.baeldung.com/java-generics)
|
||||
- [Generate equals() and hashCode() with Eclipse](http://www.baeldung.com/java-eclipse-equals-and-hashcode)
|
||||
- [A Guide To Java Regular Expressions API](http://www.baeldung.com/regular-expressions-java)
|
||||
- [Sorting in Java](http://www.baeldung.com/java-sorting)
|
||||
- [Getting Started with Java Properties](http://www.baeldung.com/java-properties)
|
||||
- [Grep in Java](http://www.baeldung.com/grep-in-java)
|
||||
- [Java - Combine Multiple Collections](http://www.baeldung.com/java-combine-multiple-collections)
|
||||
- [Simulated Annealing for Travelling Salesman Problem](http://www.baeldung.com/java-simulated-annealing-for-traveling-salesman)
|
||||
- [Slope One Algorithm: Collaborative Filtering Recommendation Systems](http://www.baeldung.com/java-collaborative-filtering-recommendations)
|
||||
- [Differences Between the Java WatchService API and the Apache Commons IO Monitor Library](http://www.baeldung.com/java-watchservice-vs-apache-commons-io-monitor-library)
|
||||
- [Pattern Search with Grep in Java](http://www.baeldung.com/grep-in-java)
|
||||
- [URL Encoding and Decoding in Java](http://www.baeldung.com/java-url-encoding-decoding)
|
||||
- [Calculate the Size of a File in Java](http://www.baeldung.com/java-file-size)
|
||||
- [The Basics of Java Generics](http://www.baeldung.com/java-generics)
|
||||
- [The Traveling Salesman Problem in Java](http://www.baeldung.com/java-simulated-annealing-for-traveling-salesman)
|
||||
- [How to Create an Executable JAR with Maven](http://www.baeldung.com/executable-jar-with-maven)
|
||||
- [How to Design a Genetic Algorithm in Java](http://www.baeldung.com/java-genetic-algorithm)
|
||||
- [Guide to WeakHashMap in Java](http://www.baeldung.com/java-weakhashmap)
|
||||
- [Spring Security – Cache Control Headers](http://www.baeldung.com/spring-security-cache-control-headers)
|
||||
- [Basic Introduction to JMX](http://www.baeldung.com/java-management-extensions)
|
||||
- [AWS Lambda With Java](http://www.baeldung.com/java-aws-lambda)
|
||||
- [Introduction to Nashorn](http://www.baeldung.com/java-nashorn)
|
||||
- [Guide to the Guava BiMap](http://www.baeldung.com/guava-bimap)
|
||||
- [Iterable to Stream in Java](http://www.baeldung.com/java-iterable-to-stream)
|
||||
- [Chained Exceptions in Java](http://www.baeldung.com/java-chained-exceptions)
|
||||
- [The Java HashMap Under the Hood](http://www.baeldung.com/java-hashmap)
|
||||
- [A Guide to LinkedHashMap in Java](http://www.baeldung.com/java-linked-hashmap)
|
||||
- [A Guide to TreeMap in Java](http://www.baeldung.com/java-treemap)
|
||||
- [A Quick JUnit vs TestNG Comparison](http://www.baeldung.com/junit-vs-testng)
|
||||
- [Java Primitive Conversions](http://www.baeldung.com/java-primitive-conversions)
|
||||
- [Java Money and the Currency API](http://www.baeldung.com/java-money-and-currency)
|
||||
- [Removing all nulls from a List in Java](http://www.baeldung.com/java-remove-nulls-from-list)
|
||||
- [Removing all duplicates from a List in Java](http://www.baeldung.com/java-remove-duplicates-from-list)
|
||||
- [Using Math.pow in Java](http://www.baeldung.com/java-math-pow)
|
||||
- [Converting Strings to Enums in Java](http://www.baeldung.com/java-string-to-enum)
|
||||
- [Flattening Nested Collections in Java](http://www.baeldung.com/java-flatten-nested-collections)
|
||||
- [Quick Guide to the Java StringTokenizer](http://www.baeldung.com/java-stringtokenizer)
|
||||
- [JVM Log Forging](http://www.baeldung.com/jvm-log-forging)
|
||||
- [Guide to sun.misc.Unsafe](http://www.baeldung.com/java-unsafe)
|
||||
- [HashSet and TreeSet Comparison](http://www.baeldung.com/java-hashset-vs-treeset)
|
||||
- [How to Perform a Simple HTTP Request in Java](http://www.baeldung.com/java-http-request)
|
||||
- [Call Methods at Runtime Using Java Reflection](http://www.baeldung.com/java-method-reflection)
|
||||
- [Guide to UUID in JAVA](http://www.baeldung.com/guide-to-uuid-in-java)
|
||||
- [Comparing getPath(), getAbsolutePath(), and getCanonicalPath() in Java](http://www.baeldung.com/java-path)
|
||||
- [How to Add a Single Element to a Stream](http://www.baeldung.com/java-stream-append-prepend)
|
||||
- [Iterating Over Enum Values in Java](http://www.baeldung.com/java-enum-iteration)
|
||||
- [Kotlin Java Interoperability](http://www.baeldung.com/kotlin-java-interoperability)
|
||||
- [Using Java MappedByteBuffer](http://www.baeldung.com/java-mapped-byte-buffer)
|
||||
- [How to Round a Number to N Decimal Places in Java](http://www.baeldung.com/java-round-decimal-number)
|
||||
- [Changing Annotation Parameters At Runtime](http://www.baeldung.com/java-reflection-change-annotation-params)
|
||||
- [How to Find all Getters Returning Null](http://www.baeldung.com/java-getters-returning-null)
|
||||
- [Converting String to Stream of chars](http://www.baeldung.com/java-string-to-stream)
|
||||
- [Changing the Order in a Sum Operation Can Produce Different Results?](http://www.baeldung.com/java-floating-point-sum-order)
|
||||
- [How to Get a Name of a Method Being Executed?](http://www.baeldung.com/java-name-of-executing-method)
|
||||
- [Iterate over a Map in Java](http://www.baeldung.com/java-iterate-map)
|
||||
- [Dynamic Proxies in Java](http://www.baeldung.com/java-dynamic-proxies)
|
||||
- [How to Copy an Array in Java](http://www.baeldung.com/java-array-copy)
|
||||
- [Introduction to JDBC](http://www.baeldung.com/java-jdbc)
|
||||
- [Period and Duration in Java](http://www.baeldung.com/java-period-duration)
|
||||
- [Converting a Stack Trace to a String in Java](http://www.baeldung.com/java-stacktrace-to-string)
|
||||
- [Count Occurrences of a Char in a String](http://www.baeldung.com/java-count-chars)
|
||||
- [Java Double Brace Initialization](http://www.baeldung.com/java-double-brace-initialization)
|
||||
- [The StackOverflowError in Java](http://www.baeldung.com/java-stack-overflow-error)
|
||||
- [Split a String in Java](http://www.baeldung.com/java-split-string)
|
||||
- [Introduction to Java Serialization](http://www.baeldung.com/java-serialization)
|
||||
- [How to Remove the Last Character of a String?](http://www.baeldung.com/java-remove-last-character-of-string)
|
||||
- [ClassNotFoundException vs NoClassDefFoundError](http://www.baeldung.com/java-classnotfoundexception-and-noclassdeffounderror)
|
||||
- [Guide to UUID in Java](http://www.baeldung.com/java-uuid)
|
||||
- [Guide to Escaping Characters in Java RegExps](http://www.baeldung.com/java-regexp-escape-char)
|
||||
- [Guide to hashCode() in Java](http://www.baeldung.com/java-hashcode)
|
||||
- [Collect a Java Stream to an Immutable Collection](http://www.baeldung.com/java-stream-immutable-collection)
|
||||
- [Difference between URL and URI](http://www.baeldung.com/java-url-vs-uri)
|
||||
- [Broadcasting and Multicasting in Java](http://www.baeldung.com/java-broadcast-multicast)
|
||||
- [Converting a List to String in Java](http://www.baeldung.com/java-list-to-string)
|
||||
- [CharSequence vs. String in Java](http://www.baeldung.com/java-char-sequence-string)
|
||||
- [Period and Duration in Java](http://www.baeldung.com/java-period-duration)
|
||||
- [Guide to the Diamond Operator in Java](http://www.baeldung.com/java-diamond-operator)
|
||||
- [Singletons in Java](http://www.baeldung.com/java-singleton)
|
||||
- [“Sneaky Throws” in Java](http://www.baeldung.com/java-sneaky-throws)
|
||||
- [OutOfMemoryError: GC Overhead Limit Exceeded](http://www.baeldung.com/java-gc-overhead-limit-exceeded)
|
||||
- [How to Iterate Over a Stream With Indices](http://www.baeldung.com/java-stream-indices)
|
||||
- [StringBuilder and StringBuffer in Java](http://www.baeldung.com/java-string-builder-string-buffer)
|
||||
- [Number of Digits in an Integer in Java](http://www.baeldung.com/java-number-of-digits-in-int)
|
||||
- [Proxy, Decorator, Adapter and Bridge Patterns](http://www.baeldung.com/java-structural-design-patterns)
|
||||
- [Creating a Java Compiler Plugin](http://www.baeldung.com/java-build-compiler-plugin)
|
||||
- [A Guide to the Static Keyword in Java](http://www.baeldung.com/java-static)
|
||||
- [Initializing Arrays in Java](http://www.baeldung.com/java-initialize-array)
|
||||
- [Guide to Java String Pool](http://www.baeldung.com/java-string-pool)
|
||||
- [Copy a File with Java](http://www.baeldung.com/java-copy-file)
|
||||
- [Introduction to Creational Design Patterns](http://www.baeldung.com/creational-design-patterns)
|
||||
|
||||
File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,13 @@
|
||||
*.class
|
||||
|
||||
#folders#
|
||||
/target
|
||||
/neoDb*
|
||||
/data
|
||||
/src/main/webapp/WEB-INF/classes
|
||||
*/META-INF/*
|
||||
|
||||
# Packaged files #
|
||||
*.jar
|
||||
*.war
|
||||
*.ear
|
||||
@@ -0,0 +1,2 @@
|
||||
### Relevant Articles:
|
||||
- [SHA-256 Hashing in Java](http://www.baeldung.com/sha-256-hashing-java)
|
||||
@@ -0,0 +1,9 @@
|
||||
package com.baeldung.javac;
|
||||
|
||||
import java.lang.annotation.*;
|
||||
|
||||
@Documented
|
||||
@Retention(RetentionPolicy.CLASS)
|
||||
@Target({ElementType.PARAMETER})
|
||||
public @interface Positive {
|
||||
}
|
||||
@@ -0,0 +1,123 @@
|
||||
package com.baeldung.javac;
|
||||
|
||||
import com.sun.source.tree.MethodTree;
|
||||
import com.sun.source.tree.VariableTree;
|
||||
import com.sun.source.util.*;
|
||||
import com.sun.tools.javac.api.BasicJavacTask;
|
||||
import com.sun.tools.javac.code.TypeTag;
|
||||
import com.sun.tools.javac.tree.JCTree;
|
||||
import com.sun.tools.javac.tree.TreeMaker;
|
||||
import com.sun.tools.javac.util.Context;
|
||||
import com.sun.tools.javac.util.Name;
|
||||
import com.sun.tools.javac.util.Names;
|
||||
|
||||
import javax.tools.JavaCompiler;
|
||||
import java.util.*;
|
||||
import java.util.stream.Collectors;
|
||||
|
||||
import static com.sun.tools.javac.util.List.nil;
|
||||
|
||||
/**
|
||||
* A {@link JavaCompiler javac} plugin which inserts {@code >= 0} checks into resulting {@code *.class} files
|
||||
* for numeric method parameters marked by {@link Positive}
|
||||
*/
|
||||
public class SampleJavacPlugin implements Plugin {
|
||||
|
||||
public static final String NAME = "MyPlugin";
|
||||
|
||||
private static Set<String> TARGET_TYPES = new HashSet<>(Arrays.asList(
|
||||
// Use only primitive types for simplicity
|
||||
byte.class.getName(), short.class.getName(), char.class.getName(),
|
||||
int.class.getName(), long.class.getName(), float.class.getName(), double.class.getName()));
|
||||
|
||||
@Override
|
||||
public String getName() {
|
||||
return NAME;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void init(JavacTask task, String... args) {
|
||||
Context context = ((BasicJavacTask) task).getContext();
|
||||
task.addTaskListener(new TaskListener() {
|
||||
@Override
|
||||
public void started(TaskEvent e) {
|
||||
}
|
||||
|
||||
@Override
|
||||
public void finished(TaskEvent e) {
|
||||
if (e.getKind() != TaskEvent.Kind.PARSE) {
|
||||
return;
|
||||
}
|
||||
e.getCompilationUnit()
|
||||
.accept(new TreeScanner<Void, Void>() {
|
||||
@Override
|
||||
public Void visitMethod(MethodTree method, Void v) {
|
||||
List<VariableTree> parametersToInstrument = method.getParameters()
|
||||
.stream()
|
||||
.filter(SampleJavacPlugin.this::shouldInstrument)
|
||||
.collect(Collectors.toList());
|
||||
if (!parametersToInstrument.isEmpty()) {
|
||||
// There is a possible case that more than one argument is marked by @Positive,
|
||||
// as the checks are added to the method's body beginning, we process parameters RTL
|
||||
// to ensure correct order.
|
||||
Collections.reverse(parametersToInstrument);
|
||||
parametersToInstrument.forEach(p -> addCheck(method, p, context));
|
||||
}
|
||||
// There is a possible case that there is a nested class declared in a method's body,
|
||||
// hence, we want to proceed with method body AST as well.
|
||||
return super.visitMethod(method, v);
|
||||
}
|
||||
}, null);
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
private boolean shouldInstrument(VariableTree parameter) {
|
||||
return TARGET_TYPES.contains(parameter.getType().toString())
|
||||
&& parameter.getModifiers().getAnnotations()
|
||||
.stream()
|
||||
.anyMatch(a -> Positive.class.getSimpleName().equals(a.getAnnotationType().toString()));
|
||||
}
|
||||
|
||||
private void addCheck(MethodTree method, VariableTree parameter, Context context) {
|
||||
JCTree.JCIf check = createCheck(parameter, context);
|
||||
JCTree.JCBlock body = (JCTree.JCBlock) method.getBody();
|
||||
body.stats = body.stats.prepend(check);
|
||||
}
|
||||
|
||||
private static JCTree.JCIf createCheck(VariableTree parameter, Context context) {
|
||||
TreeMaker factory = TreeMaker.instance(context);
|
||||
Names symbolsTable = Names.instance(context);
|
||||
|
||||
return factory.at(((JCTree) parameter).pos)
|
||||
.If(factory.Parens(createIfCondition(factory, symbolsTable, parameter)),
|
||||
createIfBlock(factory, symbolsTable, parameter),
|
||||
null);
|
||||
}
|
||||
|
||||
private static JCTree.JCBinary createIfCondition(TreeMaker factory, Names symbolsTable, VariableTree parameter) {
|
||||
Name parameterId = symbolsTable.fromString(parameter.getName().toString());
|
||||
return factory.Binary(JCTree.Tag.LE,
|
||||
factory.Ident(parameterId),
|
||||
factory.Literal(TypeTag.INT, 0));
|
||||
}
|
||||
|
||||
private static JCTree.JCBlock createIfBlock(TreeMaker factory, Names symbolsTable, VariableTree parameter) {
|
||||
String parameterName = parameter.getName().toString();
|
||||
Name parameterId = symbolsTable.fromString(parameterName);
|
||||
|
||||
String errorMessagePrefix = String.format("Argument '%s' of type %s is marked by @%s but got '",
|
||||
parameterName, parameter.getType(), Positive.class.getSimpleName());
|
||||
String errorMessageSuffix = "' for it";
|
||||
|
||||
return factory.Block(0, com.sun.tools.javac.util.List.of(
|
||||
factory.Throw(
|
||||
factory.NewClass(null, nil(),
|
||||
factory.Ident(symbolsTable.fromString(IllegalArgumentException.class.getSimpleName())),
|
||||
com.sun.tools.javac.util.List.of(factory.Binary(JCTree.Tag.PLUS,
|
||||
factory.Binary(JCTree.Tag.PLUS, factory.Literal(TypeTag.CLASS, errorMessagePrefix),
|
||||
factory.Ident(parameterId)),
|
||||
factory.Literal(TypeTag.CLASS, errorMessageSuffix))), null))));
|
||||
}
|
||||
|
||||
}
|
||||
@@ -0,0 +1,6 @@
|
||||
log4j.rootLogger=DEBUG, A1
|
||||
|
||||
log4j.appender.A1=org.apache.log4j.ConsoleAppender
|
||||
|
||||
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
|
||||
log4j.appender.A1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
|
||||
@@ -0,0 +1,19 @@
|
||||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<configuration>
|
||||
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
|
||||
<encoder>
|
||||
<pattern>web - %date [%thread] %-5level %logger{36} - %message%n
|
||||
</pattern>
|
||||
</encoder>
|
||||
</appender>
|
||||
|
||||
<logger name="org.springframework" level="WARN" />
|
||||
<logger name="org.springframework.transaction" level="WARN" />
|
||||
|
||||
<!-- in order to debug some marshalling issues, this needs to be TRACE -->
|
||||
<logger name="org.springframework.web.servlet.mvc" level="WARN" />
|
||||
|
||||
<root level="INFO">
|
||||
<appender-ref ref="STDOUT" />
|
||||
</root>
|
||||
</configuration>
|
||||
@@ -0,0 +1,42 @@
|
||||
package com.baeldung.javac;
|
||||
|
||||
import org.junit.Test;
|
||||
|
||||
import static org.junit.Assert.assertEquals;
|
||||
|
||||
public class SampleJavacPluginIntegrationTest {
|
||||
|
||||
private static final String CLASS_TEMPLATE =
|
||||
"package com.baeldung.javac;\n" +
|
||||
"\n" +
|
||||
"public class Test {\n" +
|
||||
" public static %1$s service(@Positive %1$s i) {\n" +
|
||||
" return i;\n" +
|
||||
" }\n" +
|
||||
"}\n" +
|
||||
"";
|
||||
|
||||
private TestCompiler compiler = new TestCompiler();
|
||||
private TestRunner runner = new TestRunner();
|
||||
|
||||
@Test(expected = IllegalArgumentException.class)
|
||||
public void givenInt_whenNegative_thenThrowsException() throws Throwable {
|
||||
compileAndRun(double.class,-1);
|
||||
}
|
||||
|
||||
@Test(expected = IllegalArgumentException.class)
|
||||
public void givenInt_whenZero_thenThrowsException() throws Throwable {
|
||||
compileAndRun(int.class,0);
|
||||
}
|
||||
|
||||
@Test
|
||||
public void givenInt_whenPositive_thenSuccess() throws Throwable {
|
||||
assertEquals(1, compileAndRun(int.class, 1));
|
||||
}
|
||||
|
||||
private Object compileAndRun(Class<?> argumentType, Object argument) throws Throwable {
|
||||
String qualifiedClassName = "com.baeldung.javac.Test";
|
||||
byte[] byteCode = compiler.compile(qualifiedClassName, String.format(CLASS_TEMPLATE, argumentType.getName()));
|
||||
return runner.run(byteCode, qualifiedClassName, "service", new Class[] {argumentType}, argument);
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,26 @@
|
||||
package com.baeldung.javac;
|
||||
|
||||
import javax.tools.SimpleJavaFileObject;
|
||||
import java.io.ByteArrayOutputStream;
|
||||
import java.io.IOException;
|
||||
import java.io.OutputStream;
|
||||
import java.net.URI;
|
||||
|
||||
/** Holds compiled byte code in a byte array */
|
||||
public class SimpleClassFile extends SimpleJavaFileObject {
|
||||
|
||||
private ByteArrayOutputStream out;
|
||||
|
||||
public SimpleClassFile(URI uri) {
|
||||
super(uri, Kind.CLASS);
|
||||
}
|
||||
|
||||
@Override
|
||||
public OutputStream openOutputStream() throws IOException {
|
||||
return out = new ByteArrayOutputStream();
|
||||
}
|
||||
|
||||
public byte[] getCompiledBinaries() {
|
||||
return out.toByteArray();
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,34 @@
|
||||
package com.baeldung.javac;
|
||||
|
||||
import javax.tools.*;
|
||||
import java.net.URI;
|
||||
import java.util.ArrayList;
|
||||
import java.util.List;
|
||||
|
||||
/** Adapts {@link SimpleClassFile} to the {@link JavaCompiler} */
|
||||
public class SimpleFileManager extends ForwardingJavaFileManager<StandardJavaFileManager> {
|
||||
|
||||
private final List<SimpleClassFile> compiled = new ArrayList<>();
|
||||
|
||||
public SimpleFileManager(StandardJavaFileManager delegate) {
|
||||
super(delegate);
|
||||
}
|
||||
|
||||
@Override
|
||||
public JavaFileObject getJavaFileForOutput(Location location,
|
||||
String className,
|
||||
JavaFileObject.Kind kind,
|
||||
FileObject sibling)
|
||||
{
|
||||
SimpleClassFile result = new SimpleClassFile(URI.create("string://" + className));
|
||||
compiled.add(result);
|
||||
return result;
|
||||
}
|
||||
|
||||
/**
|
||||
* @return compiled binaries processed by the current class
|
||||
*/
|
||||
public List<SimpleClassFile> getCompiled() {
|
||||
return compiled;
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,23 @@
|
||||
package com.baeldung.javac;
|
||||
|
||||
import javax.tools.SimpleJavaFileObject;
|
||||
import java.net.URI;
|
||||
|
||||
/** Exposes given test source to the compiler. */
|
||||
public class SimpleSourceFile extends SimpleJavaFileObject {
|
||||
|
||||
private final String content;
|
||||
|
||||
public SimpleSourceFile(String qualifiedClassName, String testSource) {
|
||||
super(URI.create(String.format("file://%s%s",
|
||||
qualifiedClassName.replaceAll("\\.", "/"),
|
||||
Kind.SOURCE.extension)),
|
||||
Kind.SOURCE);
|
||||
content = testSource;
|
||||
}
|
||||
|
||||
@Override
|
||||
public CharSequence getCharContent(boolean ignoreEncodingErrors) {
|
||||
return content;
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,35 @@
|
||||
package com.baeldung.javac;
|
||||
|
||||
import javax.tools.JavaCompiler;
|
||||
import javax.tools.ToolProvider;
|
||||
import java.io.StringWriter;
|
||||
import java.util.ArrayList;
|
||||
import java.util.List;
|
||||
|
||||
import static java.util.Arrays.asList;
|
||||
import static java.util.Collections.singletonList;
|
||||
|
||||
public class TestCompiler {
|
||||
public byte[] compile(String qualifiedClassName, String testSource) {
|
||||
StringWriter output = new StringWriter();
|
||||
|
||||
JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
|
||||
SimpleFileManager fileManager = new SimpleFileManager(compiler.getStandardFileManager(
|
||||
null,
|
||||
null,
|
||||
null
|
||||
));
|
||||
List<SimpleSourceFile> compilationUnits = singletonList(new SimpleSourceFile(qualifiedClassName, testSource));
|
||||
List<String> arguments = new ArrayList<>();
|
||||
arguments.addAll(asList("-classpath", System.getProperty("java.class.path"),
|
||||
"-Xplugin:" + SampleJavacPlugin.NAME));
|
||||
JavaCompiler.CompilationTask task = compiler.getTask(output,
|
||||
fileManager,
|
||||
null,
|
||||
arguments,
|
||||
null,
|
||||
compilationUnits);
|
||||
task.call();
|
||||
return fileManager.getCompiled().iterator().next().getCompiledBinaries();
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,41 @@
|
||||
package com.baeldung.javac;
|
||||
|
||||
import java.lang.reflect.InvocationTargetException;
|
||||
import java.lang.reflect.Method;
|
||||
|
||||
public class TestRunner {
|
||||
|
||||
public Object run(byte[] byteCode,
|
||||
String qualifiedClassName,
|
||||
String methodName,
|
||||
Class<?>[] argumentTypes,
|
||||
Object... args)
|
||||
throws Throwable
|
||||
{
|
||||
ClassLoader classLoader = new ClassLoader() {
|
||||
@Override
|
||||
protected Class<?> findClass(String name) throws ClassNotFoundException {
|
||||
return defineClass(name, byteCode, 0, byteCode.length);
|
||||
}
|
||||
};
|
||||
Class<?> clazz;
|
||||
try {
|
||||
clazz = classLoader.loadClass(qualifiedClassName);
|
||||
} catch (ClassNotFoundException e) {
|
||||
throw new RuntimeException("Can't load compiled test class", e);
|
||||
}
|
||||
|
||||
Method method;
|
||||
try {
|
||||
method = clazz.getMethod(methodName, argumentTypes);
|
||||
} catch (NoSuchMethodException e) {
|
||||
throw new RuntimeException("Can't find the 'main()' method in the compiled test class", e);
|
||||
}
|
||||
|
||||
try {
|
||||
return method.invoke(null, args);
|
||||
} catch (InvocationTargetException e) {
|
||||
throw e.getCause();
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,13 @@
|
||||
*.class
|
||||
|
||||
#folders#
|
||||
/target
|
||||
/neoDb*
|
||||
/data
|
||||
/src/main/webapp/WEB-INF/classes
|
||||
*/META-INF/*
|
||||
|
||||
# Packaged files #
|
||||
*.jar
|
||||
*.war
|
||||
*.ear
|
||||
Reference in New Issue
Block a user