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/* *******************************************************************
* Copyright (c) 2016-2017 Contributors
* All rights reserved.
* This program and the accompanying materials are made available
* under the terms of the Eclipse Public License v 2.0
* which accompanies this distribution and is available at
* https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
* ******************************************************************/
package org.aspectj.apache.bcel.classfile.tests;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import org.aspectj.apache.bcel.Constants;
import org.aspectj.apache.bcel.classfile.Attribute;
import org.aspectj.apache.bcel.classfile.ClassParser;
import org.aspectj.apache.bcel.classfile.JavaClass;
import org.aspectj.apache.bcel.classfile.Module;
import org.aspectj.apache.bcel.classfile.Module.Export;
import org.aspectj.apache.bcel.classfile.Module.Open;
import org.aspectj.apache.bcel.classfile.Module.Provide;
import org.aspectj.apache.bcel.classfile.Module.Require;
import org.aspectj.apache.bcel.classfile.Module.Uses;
import org.aspectj.apache.bcel.classfile.SourceFile;
/**
* https://cr.openjdk.java.net/~mr/jigsaw/spec/lang-vm.html
*
* @author Andy Clement
*/
public class ModuleTest extends BcelTestCase {
public void testLoadSimpleModuleClass() throws Exception {
String moduleFilename = "testdata/modules/one/module-info.class";
ClassParser classParser = new ClassParser(moduleFilename);
JavaClass javaClass = classParser.parse();
assertNotNull(javaClass);
assertEquals(Constants.ClassFileVersion.of(9).MAJOR, javaClass.getMajor());
assertEquals(Constants.ClassFileVersion.of(9).MINOR, javaClass.getMinor());
assertEquals(Constants.ACC_MODULE,javaClass.getModifiers());
assertEquals(0,javaClass.getSuperclassNameIndex());
assertEquals(0,javaClass.getInterfaceIndices().length);
assertEquals(0,javaClass.getFields().length);
assertEquals(0,javaClass.getMethods().length);
Attribute[] attrs = javaClass.getAttributes();
assertEquals(2,attrs.length);
SourceFile sourceFile = (SourceFile) getAttribute(attrs,Constants.ATTR_SOURCE_FILE);
Module moduleAttr = (Module) getAttribute(attrs, Constants.ATTR_MODULE);
byte[] originalData = moduleAttr.getBytes();
String[] requiredModuleNames = moduleAttr.getRequiredModuleNames();
assertEquals(1,requiredModuleNames.length);
assertEquals("java.base",requiredModuleNames[0]);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
moduleAttr.dump(new DataOutputStream(baos));
byte[] newData = baos.toByteArray();
// The 6 offset here is because the newdata includes the 2byte cpool pointer for the name 'Module'
// and the 4byte int length field for the attribute data
if (newData.length!=originalData.length+6) {
fail("Expected the length of the original attribute ("+originalData.length+") to match the new written length ("+newData.length+")");
}
for (int i=0;i<originalData.length;i++) {
if (originalData[i]!=newData[i+6]) {
fail("byte mismatch at position "+i+" of "+newData.length);
}
}
}
public void testRequires() throws Exception {
Module moduleAttr = getModuleAttribute("testdata/modules/two/d/module-info.class");
Require[] requires = moduleAttr.getRequires();
assertEquals(4, requires.length);
assertEquals("requires mandated java.base 9",requires[0].toString());
assertEquals("requires a.b.c",requires[1].toString());
assertEquals("requires static b.c.d",requires[2].toString());
assertEquals("requires transitive c.d.e",requires[3].toString());
assertEquals("java.base",requires[0].getModuleName());
assertEquals("a.b.c",requires[1].getModuleName());
assertEquals("b.c.d",requires[2].getModuleName());
assertEquals("c.d.e",requires[3].getModuleName());
}
public void testExports() throws Exception {
Module moduleAttr = getModuleAttribute("testdata/modules/two/e/module-info.class");
Export[] exports = moduleAttr.getExports();
assertEquals(3, exports.length);
assertEquals("exports com.foo1", exports[0].toString());
assertEquals("exports com.foo2 to a.b.c",exports[1].toString());
assertEquals("exports com.foo3 to a.b.c, b.c.d",exports[2].toString());
assertEquals("com/foo1",exports[0].getPackage());
assertEquals("com/foo2",exports[1].getPackage());
assertEquals("com/foo3",exports[2].getPackage());
assertEquals("a.b.c",exports[1].getToModuleNames()[0]);
assertEquals("a.b.c",exports[2].getToModuleNames()[0]);
assertEquals("b.c.d",exports[2].getToModuleNames()[1]);
}
public void testOpens() throws Exception {
Module moduleAttr = getModuleAttribute("testdata/modules/two/h/module-info.class");
Open[] opens = moduleAttr.getOpens();
assertEquals(3, opens.length);
assertEquals("opens com.foo1", opens[0].toString());
assertEquals("opens com.foo2 to a.b.c", opens[1].toString());
assertEquals("opens com.foo3 to a.b.c, b.c.d", opens[2].toString());
}
public void testUses() throws Exception {
Module moduleAttr = getModuleAttribute("testdata/modules/two/f/module-info.class");
Uses[] uses = moduleAttr.getUses();
assertEquals(1,uses.length);
assertEquals("com/foo1/I1",uses[0].getTypeName());
assertEquals("uses com.foo1.I1",uses[0].toString());
}
public void testProvides() throws Exception {
Module moduleAttr = getModuleAttribute("testdata/modules/two/g/module-info.class");
Provide[] provides = moduleAttr.getProvides();
assertEquals(2,provides.length);
assertEquals("provides com.foo1.I1 with com.foo1.C1",provides[0].toString());
assertEquals("provides com.foo2.I2 with com.foo2.C2",provides[1].toString());
assertEquals("com/foo1/I1",provides[0].getProvidedType());
assertEquals("com/foo1/C1",provides[0].getWithTypeStrings()[0]);
assertEquals("com/foo2/I2",provides[1].getProvidedType());
assertEquals("com/foo2/C2",provides[1].getWithTypeStrings()[0]);
}
// ---
private Module getModuleAttribute(String moduleInfoClass) throws Exception {
ClassParser classParser = new ClassParser(moduleInfoClass);
JavaClass javaClass = classParser.parse();
return (Module)getAttribute(javaClass.getAttributes(), Constants.ATTR_MODULE);
}
}
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