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Spring Framework example source code file (ClassMetadataReadingVisitor.java)

This example Spring Framework source code file (ClassMetadataReadingVisitor.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

classmetadata, classmetadata, classmetadatareadingvisitor, classmetadatareadingvisitor, emptyvisitor, emptyvisitor, string, string

The Spring Framework ClassMetadataReadingVisitor.java source code

/*
 * Copyright 2002-2008 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 org.objectweb.asm.Opcodes;
import org.objectweb.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 extends EmptyVisitor implements ClassMetadata {

	private String className;

	private boolean isInterface;

	private boolean isAbstract;

	private String enclosingClassName;

	private boolean independentInnerClass;

	private String superClassName;

	private String[] interfaces;


	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);
		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 && this.className.equals(ClassUtils.convertResourcePathToClassName(name))) {
			this.enclosingClassName = ClassUtils.convertResourcePathToClassName(outerName);
			this.independentInnerClass = ((access & Opcodes.ACC_STATIC) != 0);
		}
	}


	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 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;
	}

}

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