ObjectType.java

/*******************************************************************************
 * Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.utility.classfile.descriptor;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.Reader;

import org.eclipse.persistence.tools.workbench.utility.classfile.Visitor;


/**
 * This class models a class file Descriptor Object Type.
 *
 * See "The Java Virtual Machine Specification" Chapter 4.
 */
public class ObjectType extends FieldType {
    private String internalTypeName;
    private String typeName;


    // ********** construction/initialization **********

    ObjectType(Reader reader) throws IOException {
        this(extractInternalNameFrom(reader));
    }

    ObjectType(String internalName) {
        super();
        this.internalTypeName = internalName;
        this.typeName = this.internalTypeName.replace('/', '.');
    }

    private static String extractInternalNameFrom(Reader reader) throws IOException {
        StringBuffer sb = new StringBuffer(256);
        for (int c = reader.read(); c != ';'; c = reader.read()) {
            sb.append((char) c);
        }
        return sb.toString();
    }


    // ********** public API **********

    public void accept(Visitor visitor) {
        visitor.visit(this);
    }

    public int arrayDepth() {
        return 0;
    }

    public String elementTypeName() {
        return this.typeName;
    }

    public String javaName() {
        return this.typeName;
    }

    public Class javaClass() throws ClassNotFoundException {
        return Class.forName(this.typeName);
    }

    public void appendDeclarationTo(StringBuffer sb) {
        sb.append(this.typeName);
    }

    public void printDeclarationOn(PrintWriter writer) {
        writer.print(this.typeName);
    }

    public String internalName() {
        StringBuffer sb = new StringBuffer();
        this.appendInternalNameTo(sb);
        return sb.toString();
    }


    // ********** internal API **********

    void appendArrayJavaNameTo(StringBuffer sb) {
        sb.append('L');
        sb.append(this.typeName);
        sb.append(';');
    }

    void appendArrayInternalNameTo(StringBuffer sb) {
        this.appendInternalNameTo(sb);
    }

    void appendInternalNameTo(StringBuffer sb) {
        sb.append('L');
        sb.append(this.internalTypeName);
        sb.append(';');
    }

}