/*
* Copyright 2002-2009 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.core.type.classreading;
import java.util.LinkedHashSet;
import java.util.Set;
import org.springframework.asm.AnnotationVisitor;
import org.springframework.asm.Attribute;
import org.springframework.asm.ClassVisitor;
import org.springframework.asm.FieldVisitor;
import org.springframework.asm.MethodVisitor;
import org.springframework.asm.Opcodes;
import org.springframework.asm.commons.EmptyVisitor;
import org.springframework.core.type.ClassMetadata;
import org.springframework.util.ClassUtils;
/**
* ASM class visitor which looks only for the class name and implemented types,
* exposing them through the {@link org.springframework.core.type.ClassMetadata}
* interface.
*
* @author Rod Johnson
* @author Costin Leau
* @author Mark Fisher
* @author Ramnivas Laddad
* @since 2.5
*/
class ClassMetadataReadingVisitor implements ClassVisitor, ClassMetadata {
private String className;
private boolean isInterface;
private boolean isAbstract;
private boolean isFinal;
private String enclosingClassName;
private boolean independentInnerClass;
private String superClassName;
private String[] interfaces;
private Set<String> memberClassNames = new LinkedHashSet<String>();
public void visit(int version, int access, String name, String signature, String supername, String[] interfaces) {
this.className = ClassUtils.convertResourcePathToClassName(name);
this.isInterface = ((access & Opcodes.ACC_INTERFACE) != 0);
this.isAbstract = ((access & Opcodes.ACC_ABSTRACT) != 0);
this.isFinal = ((access & Opcodes.ACC_FINAL) != 0);
if (supername != null) {
this.superClassName = ClassUtils.convertResourcePathToClassName(supername);
}
this.interfaces = new String[interfaces.length];
for (int i = 0; i < interfaces.length; i++) {
this.interfaces[i] = ClassUtils.convertResourcePathToClassName(interfaces[i]);
}
}
public void visitOuterClass(String owner, String name, String desc) {
this.enclosingClassName = ClassUtils.convertResourcePathToClassName(owner);
}
public void visitInnerClass(String name, String outerName, String innerName, int access) {
if (outerName != null) {
String fqName = ClassUtils.convertResourcePathToClassName(name);
String fqOuterName = ClassUtils.convertResourcePathToClassName(outerName);
if (this.className.equals(fqName)) {
this.enclosingClassName = fqOuterName;
this.independentInnerClass = ((access & Opcodes.ACC_STATIC) != 0);
}
else if (this.className.equals(fqOuterName)) {
this.memberClassNames.add(fqName);
}
}
}
public void visitSource(String source, String debug) {
// no-op
}
public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
// no-op
return new EmptyVisitor();
}
public void visitAttribute(Attribute attr) {
// no-op
}
public FieldVisitor visitField(int access, String name, String desc, String signature, Object value) {
// no-op
return new EmptyVisitor();
}
public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
// no-op
return new EmptyVisitor();
}
public void visitEnd() {
// no-op
}
public String getClassName() {
return this.className;
}
public boolean isInterface() {
return this.isInterface;
}
public boolean isAbstract() {
return this.isAbstract;
}
public boolean isConcrete() {
return !(this.isInterface || this.isAbstract);
}
public boolean isFinal() {
return this.isFinal;
}
public boolean isIndependent() {
return (this.enclosingClassName == null || this.independentInnerClass);
}
public boolean hasEnclosingClass() {
return (this.enclosingClassName != null);
}
public String getEnclosingClassName() {
return this.enclosingClassName;
}
public boolean hasSuperClass() {
return (this.superClassName != null);
}
public String getSuperClassName() {
return this.superClassName;
}
public String[] getInterfaceNames() {
return this.interfaces;
}
public String[] getMemberClassNames() {
return this.memberClassNames.toArray(new String[this.memberClassNames.size()]);
}
}