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package org.objectweb.asm.signature;
import static org.junit.jupiter.api.Assertions.assertFalse;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Stream;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.test.AsmTest;
import org.objectweb.asm.test.AsmTest.PrecompiledClass;
/**
* Provides class, field and method signatures for parameterized unit tests.
*
* @author Eric Bruneton
*/
public final class SignaturesProviders {
private static final List<String> CLASS_SIGNATURES = new ArrayList<>();
private static final List<String> FIELD_SIGNATURES = new ArrayList<>();
private static final List<String> METHOD_SIGNATURES = new ArrayList<>();
static {
AsmTest.allClassesAndLatestApi()
.map(argument -> (PrecompiledClass) argument.get()[0])
.filter(precompiledClass -> !precompiledClass.isMoreRecentThan(AsmTest.Api.ASM7))
.forEach(precompiledClass -> collectSignatures(precompiledClass));
assertFalse(CLASS_SIGNATURES.isEmpty());
assertFalse(FIELD_SIGNATURES.isEmpty());
assertFalse(METHOD_SIGNATURES.isEmpty());
for (int depth = 0; depth < 48; ++depth) {
METHOD_SIGNATURES.add(buildDeepSignature(new StringBuilder(), depth).toString());
}
}
private SignaturesProviders() {}
private static void collectSignatures(final PrecompiledClass classParameter) {
ClassReader classReader = new ClassReader(classParameter.getBytes());
classReader.accept(
new ClassVisitor(/*latest api */ Opcodes.ASM9) {
@Override
public void visit(
final int version,
final int access,
final String name,
final String signature,
final String superName,
final String[] interfaces) {
if (signature != null) {
CLASS_SIGNATURES.add(signature);
}
}
@Override
public FieldVisitor visitField(
final int access,
final String name,
final String descriptor,
final String signature,
final Object value) {
if (signature != null) {
FIELD_SIGNATURES.add(signature);
}
return null;
}
@Override
public MethodVisitor visitMethod(
final int access,
final String name,
final String descriptor,
final String signature,
final String[] exceptions) {
if (signature != null) {
METHOD_SIGNATURES.add(signature);
}
return null;
}
},
0);
}
private static StringBuilder buildDeepSignature(final StringBuilder signature, final int depth) {
signature.append("LGeneric");
if (depth == 0) {
signature.append(';');
} else {
signature.append("<LOpen;");
buildDeepSignature(signature, depth - 1);
signature.append("LClose;>;");
}
return signature;
}
static Stream<String> classSignatures() {
return CLASS_SIGNATURES.stream();
}
static Stream<String> fieldSignatures() {
return FIELD_SIGNATURES.stream();
}
static Stream<String> methodSignatures() {
return METHOD_SIGNATURES.stream();
}
}
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