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src/java.xml/share/classes/com/sun/org/apache/bcel/internal/util/BCELFactory.java
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@@ -19,306 +19,333 @@
* limitations under the License.
*/
package com.sun.org.apache.bcel.internal.util;
-import com.sun.org.apache.bcel.internal.generic.*;
-import com.sun.org.apache.bcel.internal.classfile.Utility;
-import com.sun.org.apache.bcel.internal.Constants;
import java.io.PrintWriter;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import com.sun.org.apache.bcel.internal.Const;
+import com.sun.org.apache.bcel.internal.classfile.Utility;
+import com.sun.org.apache.bcel.internal.generic.AllocationInstruction;
+import com.sun.org.apache.bcel.internal.generic.ArrayInstruction;
+import com.sun.org.apache.bcel.internal.generic.ArrayType;
+import com.sun.org.apache.bcel.internal.generic.BranchHandle;
+import com.sun.org.apache.bcel.internal.generic.BranchInstruction;
+import com.sun.org.apache.bcel.internal.generic.CHECKCAST;
+import com.sun.org.apache.bcel.internal.generic.CPInstruction;
+import com.sun.org.apache.bcel.internal.generic.CodeExceptionGen;
+import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
+import com.sun.org.apache.bcel.internal.generic.ConstantPushInstruction;
+import com.sun.org.apache.bcel.internal.generic.EmptyVisitor;
+import com.sun.org.apache.bcel.internal.generic.FieldInstruction;
+import com.sun.org.apache.bcel.internal.generic.IINC;
+import com.sun.org.apache.bcel.internal.generic.INSTANCEOF;
+import com.sun.org.apache.bcel.internal.generic.Instruction;
+import com.sun.org.apache.bcel.internal.generic.InstructionConst;
+import com.sun.org.apache.bcel.internal.generic.InstructionHandle;
+import com.sun.org.apache.bcel.internal.generic.InvokeInstruction;
+import com.sun.org.apache.bcel.internal.generic.LDC;
+import com.sun.org.apache.bcel.internal.generic.LDC2_W;
+import com.sun.org.apache.bcel.internal.generic.LocalVariableInstruction;
+import com.sun.org.apache.bcel.internal.generic.MULTIANEWARRAY;
+import com.sun.org.apache.bcel.internal.generic.MethodGen;
+import com.sun.org.apache.bcel.internal.generic.NEWARRAY;
+import com.sun.org.apache.bcel.internal.generic.ObjectType;
+import com.sun.org.apache.bcel.internal.generic.RET;
+import com.sun.org.apache.bcel.internal.generic.ReturnInstruction;
+import com.sun.org.apache.bcel.internal.generic.Select;
+import com.sun.org.apache.bcel.internal.generic.Type;
/**
* Factory creates il.append() statements, and sets instruction targets.
* A helper class for BCELifier.
*
* @see BCELifier
- * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
+ * @version $Id: BCELFactory.java 1749603 2016-06-21 20:50:19Z ggregory $
*/
class BCELFactory extends EmptyVisitor {
- private MethodGen _mg;
- private PrintWriter _out;
- private ConstantPoolGen _cp;
- BCELFactory(MethodGen mg, PrintWriter out) {
+ private static final String CONSTANT_PREFIX = Const.class.getSimpleName()+".";
+ private final MethodGen _mg;
+ private final PrintWriter _out;
+ private final ConstantPoolGen _cp;
+
+
+ BCELFactory(final MethodGen mg, final PrintWriter out) {
_mg = mg;
_cp = mg.getConstantPool();
_out = out;
}
- private HashMap branch_map = new HashMap(); // Map<Instruction, InstructionHandle>
+ private final Map<Instruction, InstructionHandle> branch_map = new HashMap<>();
- public void start() {
- if(!_mg.isAbstract() && !_mg.isNative()) {
- for(InstructionHandle ih = _mg.getInstructionList().getStart();
- ih != null; ih = ih.getNext()) {
- Instruction i = ih.getInstruction();
- if(i instanceof BranchInstruction) {
+ public void start() {
+ if (!_mg.isAbstract() && !_mg.isNative()) {
+ for (InstructionHandle ih = _mg.getInstructionList().getStart(); ih != null; ih = ih
+ .getNext()) {
+ final Instruction i = ih.getInstruction();
+ if (i instanceof BranchInstruction) {
branch_map.put(i, ih); // memorize container
}
-
- if(ih.hasTargeters()) {
- if(i instanceof BranchInstruction) {
+ if (ih.hasTargeters()) {
+ if (i instanceof BranchInstruction) {
_out.println(" InstructionHandle ih_" + ih.getPosition() + ";");
} else {
_out.print(" InstructionHandle ih_" + ih.getPosition() + " = ");
}
} else {
_out.print(" ");
}
-
- if(!visitInstruction(i))
+ if (!visitInstruction(i)) {
i.accept(this);
}
-
+ }
updateBranchTargets();
updateExceptionHandlers();
}
}
- private boolean visitInstruction(Instruction i) {
- short opcode = i.getOpcode();
- if((InstructionConstants.INSTRUCTIONS[opcode] != null) &&
- !(i instanceof ConstantPushInstruction) &&
- !(i instanceof ReturnInstruction)) { // Handled below
- _out.println("il.append(InstructionConstants." +
- i.getName().toUpperCase() + ");");
+ private boolean visitInstruction( final Instruction i ) {
+ final short opcode = i.getOpcode();
+ if ((InstructionConst.getInstruction(opcode) != null)
+ && !(i instanceof ConstantPushInstruction) && !(i instanceof ReturnInstruction)) { // Handled below
+ _out.println("il.append(InstructionConst."
+ + i.getName().toUpperCase(Locale.ENGLISH) + ");");
return true;
}
-
return false;
}
- public void visitLocalVariableInstruction(LocalVariableInstruction i) {
- short opcode = i.getOpcode();
- Type type = i.getType(_cp);
-
- if(opcode == Constants.IINC) {
- _out.println("il.append(new IINC(" + i.getIndex() + ", " +
- ((IINC)i).getIncrement() + "));");
+
+ @Override
+ public void visitLocalVariableInstruction( final LocalVariableInstruction i ) {
+ final short opcode = i.getOpcode();
+ final Type type = i.getType(_cp);
+ if (opcode == Const.IINC) {
+ _out.println("il.append(new IINC(" + i.getIndex() + ", " + ((IINC) i).getIncrement()
+ + "));");
} else {
- String kind = (opcode < Constants.ISTORE)? "Load" : "Store";
- _out.println("il.append(_factory.create" + kind + "(" +
- BCELifier.printType(type) + ", " +
- i.getIndex() + "));");
+ final String kind = (opcode < Const.ISTORE) ? "Load" : "Store";
+ _out.println("il.append(_factory.create" + kind + "(" + BCELifier.printType(type)
+ + ", " + i.getIndex() + "));");
}
}
- public void visitArrayInstruction(ArrayInstruction i) {
- short opcode = i.getOpcode();
- Type type = i.getType(_cp);
- String kind = (opcode < Constants.IASTORE)? "Load" : "Store";
- _out.println("il.append(_factory.createArray" + kind + "(" +
- BCELifier.printType(type) + "));");
+ @Override
+ public void visitArrayInstruction( final ArrayInstruction i ) {
+ final short opcode = i.getOpcode();
+ final Type type = i.getType(_cp);
+ final String kind = (opcode < Const.IASTORE) ? "Load" : "Store";
+ _out.println("il.append(_factory.createArray" + kind + "(" + BCELifier.printType(type)
+ + "));");
}
- public void visitFieldInstruction(FieldInstruction i) {
- short opcode = i.getOpcode();
-
- String class_name = i.getClassName(_cp);
- String field_name = i.getFieldName(_cp);
- Type type = i.getFieldType(_cp);
- _out.println("il.append(_factory.createFieldAccess(\"" +
- class_name + "\", \"" + field_name + "\", " +
- BCELifier.printType(type) + ", " +
- "Constants." + Constants.OPCODE_NAMES[opcode].toUpperCase() +
- "));");
+ @Override
+ public void visitFieldInstruction( final FieldInstruction i ) {
+ final short opcode = i.getOpcode();
+ final String class_name = i.getReferenceType(_cp).getSignature();
+ final String field_name = i.getFieldName(_cp);
+ final Type type = i.getFieldType(_cp);
+ _out.println("il.append(_factory.createFieldAccess(\"" + class_name + "\", \"" + field_name
+ + "\", " + BCELifier.printType(type) + ", " + CONSTANT_PREFIX
+ + Const.getOpcodeName(opcode).toUpperCase(Locale.ENGLISH) + "));");
}
- public void visitInvokeInstruction(InvokeInstruction i) {
- short opcode = i.getOpcode();
- String class_name = i.getClassName(_cp);
- String method_name = i.getMethodName(_cp);
- Type type = i.getReturnType(_cp);
- Type[] arg_types = i.getArgumentTypes(_cp);
- _out.println("il.append(_factory.createInvoke(\"" +
- class_name + "\", \"" + method_name + "\", " +
- BCELifier.printType(type) + ", " +
- BCELifier.printArgumentTypes(arg_types) + ", " +
- "Constants." + Constants.OPCODE_NAMES[opcode].toUpperCase() +
- "));");
+ @Override
+ public void visitInvokeInstruction( final InvokeInstruction i ) {
+ final short opcode = i.getOpcode();
+ final String class_name = i.getReferenceType(_cp).getSignature();
+ final String method_name = i.getMethodName(_cp);
+ final Type type = i.getReturnType(_cp);
+ final Type[] arg_types = i.getArgumentTypes(_cp);
+ _out.println("il.append(_factory.createInvoke(\"" + class_name + "\", \"" + method_name
+ + "\", " + BCELifier.printType(type) + ", "
+ + BCELifier.printArgumentTypes(arg_types) + ", " + CONSTANT_PREFIX
+ + Const.getOpcodeName(opcode).toUpperCase(Locale.ENGLISH) + "));");
}
- public void visitAllocationInstruction(AllocationInstruction i) {
- Type type;
- if(i instanceof CPInstruction) {
- type = ((CPInstruction)i).getType(_cp);
+ @Override
+ public void visitAllocationInstruction( final AllocationInstruction i ) {
+ Type type;
+ if (i instanceof CPInstruction) {
+ type = ((CPInstruction) i).getType(_cp);
} else {
- type = ((NEWARRAY)i).getType();
+ type = ((NEWARRAY) i).getType();
}
-
- short opcode = ((Instruction)i).getOpcode();
+ final short opcode = ((Instruction) i).getOpcode();
int dim = 1;
-
- switch(opcode) {
- case Constants.NEW:
- _out.println("il.append(_factory.createNew(\"" +
- ((ObjectType)type).getClassName() + "\"));");
+ switch (opcode) {
+ case Const.NEW:
+ _out.println("il.append(_factory.createNew(\"" + ((ObjectType) type).getClassName()
+ + "\"));");
break;
-
- case Constants.MULTIANEWARRAY:
- dim = ((MULTIANEWARRAY)i).getDimensions();
-
- case Constants.ANEWARRAY:
- case Constants.NEWARRAY:
- _out.println("il.append(_factory.createNewArray(" +
- BCELifier.printType(type) + ", (short) " + dim + "));");
+ case Const.MULTIANEWARRAY:
+ dim = ((MULTIANEWARRAY) i).getDimensions();
+ //$FALL-THROUGH$
+ case Const.ANEWARRAY:
+ case Const.NEWARRAY:
+ if (type instanceof ArrayType) {
+ type = ((ArrayType) type).getBasicType();
+ }
+ _out.println("il.append(_factory.createNewArray(" + BCELifier.printType(type)
+ + ", (short) " + dim + "));");
break;
-
default:
throw new RuntimeException("Oops: " + opcode);
}
}
- private void createConstant(Object value) {
- String embed = value.toString();
- if(value instanceof String)
- embed = '"' + Utility.convertString(value.toString()) + '"';
- else if(value instanceof Character)
- embed = "(char)0x" + Integer.toHexString(((Character)value).charValue());
+ private void createConstant( final Object value ) {
+ String embed = value.toString();
+ if (value instanceof String) {
+ embed = '"' + Utility.convertString(embed) + '"';
+ } else if (value instanceof Character) {
+ embed = "(char)0x" + Integer.toHexString(((Character) value).charValue());
+ } else if (value instanceof Float) {
+ embed += "f";
+ } else if (value instanceof Long) {
+ embed += "L";
+ } else if (value instanceof ObjectType) {
+ final ObjectType ot = (ObjectType) value;
+ embed = "new ObjectType(\""+ot.getClassName()+"\")";
+ }
_out.println("il.append(new PUSH(_cp, " + embed + "));");
}
- public void visitLDC(LDC i) {
+
+ @Override
+ public void visitLDC( final LDC i ) {
createConstant(i.getValue(_cp));
}
- public void visitLDC2_W(LDC2_W i) {
+
+ @Override
+ public void visitLDC2_W( final LDC2_W i ) {
createConstant(i.getValue(_cp));
}
- public void visitConstantPushInstruction(ConstantPushInstruction i) {
+
+ @Override
+ public void visitConstantPushInstruction( final ConstantPushInstruction i ) {
createConstant(i.getValue());
}
- public void visitINSTANCEOF(INSTANCEOF i) {
- Type type = i.getType(_cp);
- _out.println("il.append(new INSTANCEOF(_cp.addClass(" +
- BCELifier.printType(type) + ")));");
+ @Override
+ public void visitINSTANCEOF( final INSTANCEOF i ) {
+ final Type type = i.getType(_cp);
+ _out.println("il.append(new INSTANCEOF(_cp.addClass(" + BCELifier.printType(type) + ")));");
}
- public void visitCHECKCAST(CHECKCAST i) {
- Type type = i.getType(_cp);
- _out.println("il.append(_factory.createCheckCast(" +
- BCELifier.printType(type) + "));");
+ @Override
+ public void visitCHECKCAST( final CHECKCAST i ) {
+ final Type type = i.getType(_cp);
+ _out.println("il.append(_factory.createCheckCast(" + BCELifier.printType(type) + "));");
}
- public void visitReturnInstruction(ReturnInstruction i) {
- Type type = i.getType(_cp);
- _out.println("il.append(_factory.createReturn(" +
- BCELifier.printType(type) + "));");
+ @Override
+ public void visitReturnInstruction( final ReturnInstruction i ) {
+ final Type type = i.getType(_cp);
+ _out.println("il.append(_factory.createReturn(" + BCELifier.printType(type) + "));");
}
// Memorize BranchInstructions that need an update
- private ArrayList branches = new ArrayList();
+ private final List<BranchInstruction> branches = new ArrayList<>();
- public void visitBranchInstruction(BranchInstruction bi) {
- BranchHandle bh = (BranchHandle)branch_map.get(bi);
- int pos = bh.getPosition();
- String name = bi.getName() + "_" + pos;
- if(bi instanceof Select) {
- Select s = (Select)bi;
+ @Override
+ public void visitBranchInstruction( final BranchInstruction bi ) {
+ final BranchHandle bh = (BranchHandle) branch_map.get(bi);
+ final int pos = bh.getPosition();
+ final String name = bi.getName() + "_" + pos;
+ if (bi instanceof Select) {
+ final Select s = (Select) bi;
branches.add(bi);
-
- StringBuffer args = new StringBuffer("new int[] { ");
- int[] matchs = s.getMatchs();
-
- for(int i=0; i < matchs.length; i++) {
+ final StringBuilder args = new StringBuilder("new int[] { ");
+ final int[] matchs = s.getMatchs();
+ for (int i = 0; i < matchs.length; i++) {
args.append(matchs[i]);
-
- if(i < matchs.length - 1)
+ if (i < matchs.length - 1) {
args.append(", ");
}
-
+ }
args.append(" }");
-
- _out.print(" Select " + name + " = new " +
- bi.getName().toUpperCase() + "(" + args +
- ", new InstructionHandle[] { ");
-
- for(int i=0; i < matchs.length; i++) {
+ _out.print("Select " + name + " = new " + bi.getName().toUpperCase(Locale.ENGLISH)
+ + "(" + args + ", new InstructionHandle[] { ");
+ for (int i = 0; i < matchs.length; i++) {
_out.print("null");
-
- if(i < matchs.length - 1)
+ if (i < matchs.length - 1) {
_out.print(", ");
}
-
- _out.println(");");
+ }
+ _out.println(" }, null);");
} else {
- int t_pos = bh.getTarget().getPosition();
+ final int t_pos = bh.getTarget().getPosition();
String target;
-
- if(pos > t_pos) {
+ if (pos > t_pos) {
target = "ih_" + t_pos;
} else {
branches.add(bi);
target = "null";
}
-
- _out.println(" BranchInstruction " + name +
- " = _factory.createBranchInstruction(" +
- "Constants." + bi.getName().toUpperCase() + ", " +
- target + ");");
+ _out.println(" BranchInstruction " + name + " = _factory.createBranchInstruction("
+ + CONSTANT_PREFIX + bi.getName().toUpperCase(Locale.ENGLISH) + ", " + target
+ + ");");
}
-
- if(bh.hasTargeters())
+ if (bh.hasTargeters()) {
_out.println(" ih_" + pos + " = il.append(" + name + ");");
- else
+ } else {
_out.println(" il.append(" + name + ");");
}
+ }
+
- public void visitRET(RET i) {
+ @Override
+ public void visitRET( final RET i ) {
_out.println("il.append(new RET(" + i.getIndex() + ")));");
}
+
private void updateBranchTargets() {
- for(Iterator i = branches.iterator(); i.hasNext(); ) {
- BranchInstruction bi = (BranchInstruction)i.next();
- BranchHandle bh = (BranchHandle)branch_map.get(bi);
- int pos = bh.getPosition();
- String name = bi.getName() + "_" + pos;
+ for (final BranchInstruction bi : branches) {
+ final BranchHandle bh = (BranchHandle) branch_map.get(bi);
+ final int pos = bh.getPosition();
+ final String name = bi.getName() + "_" + pos;
int t_pos = bh.getTarget().getPosition();
-
_out.println(" " + name + ".setTarget(ih_" + t_pos + ");");
-
- if(bi instanceof Select) {
- InstructionHandle[] ihs = ((Select)bi).getTargets();
-
- for(int j = 0; j < ihs.length; j++) {
+ if (bi instanceof Select) {
+ final InstructionHandle[] ihs = ((Select) bi).getTargets();
+ for (int j = 0; j < ihs.length; j++) {
t_pos = ihs[j].getPosition();
-
- _out.println(" " + name + ".setTarget(" + j +
- ", ih_" + t_pos + ");");
+ _out.println(" " + name + ".setTarget(" + j + ", ih_" + t_pos + ");");
}
}
}
}
- private void updateExceptionHandlers() {
- CodeExceptionGen[] handlers = _mg.getExceptionHandlers();
- for(int i=0; i < handlers.length; i++) {
- CodeExceptionGen h = handlers[i];
- String type = (h.getCatchType() == null)?
- "null" : BCELifier.printType(h.getCatchType());
-
- _out.println(" method.addExceptionHandler(" +
- "ih_" + h.getStartPC().getPosition() + ", " +
- "ih_" + h.getEndPC().getPosition() + ", " +
- "ih_" + h.getHandlerPC().getPosition() + ", " +
- type + ");");
+ private void updateExceptionHandlers() {
+ final CodeExceptionGen[] handlers = _mg.getExceptionHandlers();
+ for (final CodeExceptionGen h : handlers) {
+ final String type = (h.getCatchType() == null) ? "null" : BCELifier.printType(h
+ .getCatchType());
+ _out.println(" method.addExceptionHandler(" + "ih_" + h.getStartPC().getPosition()
+ + ", " + "ih_" + h.getEndPC().getPosition() + ", " + "ih_"
+ + h.getHandlerPC().getPosition() + ", " + type + ");");
}
}
}
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