/
ClassFile.java
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/
ClassFile.java
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package org.isk.jvmhardcore.pjba.structure;
import org.isk.jvmhardcore.pjba.structure.Constant.ConstantPoolEntry;
import org.isk.jvmhardcore.pjba.structure.attribute.constraint.ClassAttribute;
import org.isk.jvmhardcore.pjba.util.Ascii;
import org.isk.jvmhardcore.pjba.util.PjbaLinkedList;
import org.isk.jvmhardcore.pjba.visitor.Visitable;
import org.isk.jvmhardcore.pjba.visitor.Visitor;
public class ClassFile implements Visitable {
final public static int MODIFIER_PUBLIC = 0x0001;
final public static int MODIFIER_FINAL = 0x0010;
final public static int MODIFIER_SUPER = 0x0020;
final public static int MODIFIER_ABSTRACT = 0x0200;
final public static int MODIFIER_INTERFACE = 0x0400;
final private int magicNumber = 0xcafebabe;
private int version = 0x30; // 48.0 = 0x00 (minor version) | 0x30 (major version)
private PjbaLinkedList<Constant.ConstantPoolEntry> constantPool;
private int accessFlags = 0x0020; // super
private int thisClass;
private int superClass;
private int[] interfaces;
private PjbaLinkedList<Field> fields;
private PjbaLinkedList<Method> methods;
private PjbaLinkedList<ClassAttribute> attributes;
private String className;
private String directories;
public ClassFile() {
this.constantPool = new PjbaLinkedList<>();
this.interfaces = new int[0];
this.fields = new PjbaLinkedList<>();
this.methods = new PjbaLinkedList<>();
this.attributes = new PjbaLinkedList<>();
}
public ClassFile(final String fullyQualifiedName) {
this();
this.parseName(fullyQualifiedName);
this.constantPool.add(null); // Index 0 reserved by the JVM
// This
final int classNameIndex = this.addConstantUTF8(fullyQualifiedName);
this.thisClass = this.addConstantClass(classNameIndex);
// Parent - Hard coded for now
final String superName = "java/lang/Object";
final int superNameIndex = this.addConstantUTF8(superName);
this.superClass = this.addConstantClass(superNameIndex);
}
// --------------------------------------------------------------------------------------------------------------------
// Support methods
// --------------------------------------------------------------------------------------------------------------------
private void parseName(final String fullyQualifiedName) {
int index = fullyQualifiedName.lastIndexOf(Ascii.SLASH);
if (index >= 0) {
this.directories = fullyQualifiedName.substring(0, ++index);
this.className = fullyQualifiedName.substring(index);
} else {
this.className = fullyQualifiedName;
}
}
// --------------------------------------------------------------------------------------------------------------------
// External getters
// --------------------------------------------------------------------------------------------------------------------
public String getClassName() {
return className;
}
public String getDirectories() {
return directories;
}
// --------------------------------------------------------------------------------------------------------------------
// ConstantPool methods
// --------------------------------------------------------------------------------------------------------------------
public void setVersion(int version) {
this.version = version;
}
public void setConstantPool(PjbaLinkedList<Constant.ConstantPoolEntry> constantPool) {
this.constantPool = constantPool;
}
public void setAccessFlags(int accessFlags) {
this.accessFlags = accessFlags;
}
public void addAccessFlags(int accessFlags) {
this.accessFlags |= accessFlags;
}
public void setThisClass(int thisClass) {
this.thisClass = thisClass;
}
public void setSuperClass(int superClass) {
this.superClass = superClass;
}
public void setInterfaces(int[] interfaces) {
this.interfaces = interfaces;
}
public void setFields(PjbaLinkedList<Field> fields) {
this.fields = fields;
}
public void setMethods(PjbaLinkedList<Method> methods) {
this.methods = methods;
}
public void setAttributes(PjbaLinkedList<ClassAttribute> attributes) {
this.attributes = attributes;
}
public void setFullyQualifiedClassName(String fullyQualifiedClassName) {
this.parseName(fullyQualifiedClassName);
}
// --------------------------------------------------------------------------------------------------------------------
// ConstantPool methods
// --------------------------------------------------------------------------------------------------------------------
public int addConstantClass(final int utf8Index) {
final Constant.Class constant = new Constant.Class(utf8Index);
return this.addConstant(constant);
}
public int addConstantString(final int utf8Index) {
final Constant.String constant = new Constant.String(utf8Index);
return this.addConstant(constant);
}
public int addConstantInteger(final int value) {
final Constant.Integer constant = new Constant.Integer(value);
return this.addConstant(constant);
}
public int addConstantFloat(final float value) {
final Constant.Float constant = new Constant.Float(value);
return this.addConstant(constant);
}
public int addConstantLong(final long value) {
final Constant.Long constant = new Constant.Long(value);
final int index = this.addConstant(constant);
this.constantPool.add(null);
return index;
}
public int addConstantDouble(final double value) {
final Constant.Double constant = new Constant.Double(value);
final int index = this.addConstant(constant);
this.constantPool.add(null);
return index;
}
public int addConstantUTF8(final String value) {
final Constant.UTF8 constant = new Constant.UTF8(value);
return this.addConstant(constant);
}
private int addConstant(final ConstantPoolEntry constant) {
final int index = this.constantPool.indexOf(constant);
if (index == -1) {
this.constantPool.add(constant);
return this.getCurrentCPIndex();
} else {
return index;
}
}
public int getCurrentCPIndex() {
return this.constantPool.size() - 1;
}
public ConstantPoolEntry getConstant(int index) {
return this.constantPool.get(index);
}
// --------------------------------------------------------------------------------------------------------------------
// Method methods
// --------------------------------------------------------------------------------------------------------------------
public void addMethod(final Method method) {
this.methods.add(method);
}
public PjbaLinkedList<Method> getMethods() {
return methods;
}
// --------------------------------------------------------------------------------------------------------------------
// Overrides
// --------------------------------------------------------------------------------------------------------------------
@Override
public void accept(Visitor visitor) {
visitor.visitMagicNumber(this.magicNumber);
visitor.visitVersion(this.version);
visitor.visitConstantPoolSize(this.constantPool.size());
this.constantPool.accept(visitor);
visitor.visitClassAccessFlags(this.accessFlags);
visitor.visitThisClass(this.thisClass);
visitor.visitSuperClass(this.superClass);
visitor.visitInterfacesSize(this.interfaces.length);
visitor.visitFieldsSize(this.fields.size());
this.fields.accept(visitor);
visitor.visitMethodsSize(this.methods.size());
this.methods.accept(visitor);
visitor.visitClassAttributeSize(this.attributes.size());
this.attributes.accept(visitor);
}
}