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Java example source code file (BasicType.java)

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

Learn more about this Java project at its project page.

Java - Java tags/keywords

arraylist, basictype, bittype, compoundtype, const, cvattributes, functiontype, listiterator, objectvisitor, pointertype, reftype, string, type, util, volatile

The BasicType.java Java example source code

/*
 * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

package sun.jvm.hotspot.debugger.cdbg.basic;

import java.util.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.debugger.cdbg.*;

public abstract class BasicType implements Type, CVAttributes {
  private String name;
  private int    size;
  private int    cvAttributes;
  // Types keep a list of const/volatile qualified variants of themselves
  private List   cvVariants;

  protected BasicType(String name, int size) {
    this(name, size, 0);
  }

  protected BasicType(String name, int size, int cvAttributes) {
    this.name = name;
    this.size = size;
    this.cvAttributes = cvAttributes;
  }

  public String       getName()    { return name; }

  /** For use during resolution only */
  protected void      setName(String name) { this.name = name; }

  public int          getSize()    { return size; }

  public BitType      asBit()      { return null; }
  public IntType      asInt()      { return null; }
  public EnumType     asEnum()     { return null; }
  public FloatType    asFloat()    { return null; }
  public DoubleType   asDouble()   { return null; }
  public PointerType  asPointer()  { return null; }
  public ArrayType    asArray()    { return null; }
  public RefType      asRef()      { return null; }
  public CompoundType asCompound() { return null; }
  public FunctionType asFunction() { return null; }
  public MemberFunctionType asMemberFunction() { return null; }
  public VoidType     asVoid()     { return null; }

  public boolean      isBit()      { return (asBit()      != null); }
  public boolean      isInt()      { return (asInt()      != null); }
  public boolean      isEnum()     { return (asEnum()     != null); }
  public boolean      isFloat()    { return (asFloat()    != null); }
  public boolean      isDouble()   { return (asDouble()   != null); }
  public boolean      isPointer()  { return (asPointer()  != null); }
  public boolean      isArray()    { return (asArray()    != null); }
  public boolean      isRef()      { return (asRef()      != null); }
  public boolean      isCompound() { return (asCompound() != null); }
  public boolean      isFunction() { return (asFunction() != null); }
  public boolean      isMemberFunction() { return (asMemberFunction() != null); }
  public boolean      isVoid()     { return (asVoid()     != null); }

  public boolean      isConst()    { return ((cvAttributes & CONST) != 0); }
  public boolean      isVolatile() { return ((cvAttributes & VOLATILE) != 0); }

  Type resolveTypes(BasicCDebugInfoDataBase db, ResolveListener listener) {
    if (cvVariants != null) {
      for (ListIterator iter = cvVariants.listIterator(); iter.hasNext(); ) {
        iter.set(db.resolveType(this, (BasicType) iter.next(), listener, "resolving const/var variants"));
      }
    }
    return this;
  }
  public boolean       isLazy() { return false; }
  public void          iterateObject(Address a, ObjectVisitor v) {
    iterateObject(a, v, null);
  }
  public abstract void iterateObject(Address a, ObjectVisitor v, FieldIdentifier f);
  public Type          getCVVariant(int cvAttributes) {
    Type t = findCVVariant(cvAttributes);
    if (t != null) return t;
    t = createCVVariant(cvAttributes);
    addCVVariant(t);
    return t;
  }

  public String toString() {
    return getName();
  }

  private   int           getCVAttributes() { return cvAttributes; }
  protected abstract Type createCVVariant(int cvAttributes);
  protected Type          findCVVariant(int cvAttributes) {
    if (cvVariants != null) {
      for (Iterator iter = cvVariants.iterator(); iter.hasNext(); ) {
        BasicType t = (BasicType) iter.next();
        if (t.getCVAttributes() == cvAttributes) return t;
      }
    }
    return null;
  }
  protected void addCVVariant(Type t) {
    if (cvVariants == null) {
      cvVariants = new ArrayList();
    }
    cvVariants.add(t);
  }

  public abstract void visit(TypeVisitor v);
}

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