Java Printer类代码示例

import org.objectweb.asm.util.Printer; //导入依赖的package包/类
@Override
public final void visitTableSwitchInsn(final int min, final int max,
        final Label dflt, final Label... labels) {
    AttributesImpl attrs = new AttributesImpl();
    attrs.addAttribute("", "min", "min", "", Integer.toString(min));
    attrs.addAttribute("", "max", "max", "", Integer.toString(max));
    attrs.addAttribute("", "dflt", "dflt", "", getLabel(dflt));
    String o = Printer.OPCODES[Opcodes.TABLESWITCH];
    sa.addStart(o, attrs);
    for (int i = 0; i < labels.length; i++) {
        AttributesImpl att2 = new AttributesImpl();
        att2.addAttribute("", "name", "name", "", getLabel(labels[i]));
        sa.addElement("label", att2);
    }
    sa.addEnd(o);
}
 

import org.objectweb.asm.util.Printer; //导入依赖的package包/类
/**
 * Runs the two-pass compiler to generate a Painless script.  (Used by the debugger.)
 * @param iface Interface the compiled script should implement
 * @param source The source code for the script.
 * @param settings The CompilerSettings to be used during the compilation.
 * @return The bytes for compilation.
 */
static byte[] compile(Class<?> iface, String name, String source, CompilerSettings settings, Printer debugStream) {
    if (source.length() > MAXIMUM_SOURCE_LENGTH) {
        throw new IllegalArgumentException("Scripts may be no longer than " + MAXIMUM_SOURCE_LENGTH +
            " characters.  The passed in script is " + source.length() + " characters.  Consider using a" +
            " plugin if a script longer than this length is a requirement.");
    }
    ScriptInterface scriptInterface = new ScriptInterface(iface);

    SSource root = Walker.buildPainlessTree(scriptInterface, name, source, settings, debugStream);

    root.analyze();
    root.write();

    return root.getBytes();
}
 

import org.objectweb.asm.util.Printer; //导入依赖的package包/类
public SSource(ScriptInterface scriptInterface, CompilerSettings settings, String name, String source, Printer debugStream,
               MainMethodReserved reserved, Location location,
               List<SFunction> functions, Globals globals, List<AStatement> statements) {
    super(location);
    this.scriptInterface = Objects.requireNonNull(scriptInterface);
    this.settings = Objects.requireNonNull(settings);
    this.name = Objects.requireNonNull(name);
    this.source = Objects.requireNonNull(source);
    this.debugStream = debugStream;
    this.reserved = Objects.requireNonNull(reserved);
    // process any synthetic functions generated by walker (because right now, thats still easy)
    functions.addAll(globals.getSyntheticMethods().values());
    globals.getSyntheticMethods().clear();
    this.functions = Collections.unmodifiableList(functions);
    this.statements = Collections.unmodifiableList(statements);
    this.globals = globals;
}
 

import org.objectweb.asm.util.Printer; //导入依赖的package包/类
/**
 * 格式化输出字节码
 * @param bytecode
 */
public static void viewByteCode(byte[] bytecode) {
    ClassReader cr = new ClassReader(bytecode);
    ClassNode cn = new ClassNode();
    cr.accept(cn, 0);
    final List<MethodNode> mns = cn.methods;
    Printer printer = new Textifier();
    TraceMethodVisitor mp = new TraceMethodVisitor(printer);
    for (MethodNode mn : mns) {
        InsnList inList = mn.instructions;
        System.out.println(mn.name);
        for (int i = 0; i < inList.size(); i++) {
            inList.get(i).accept(mp);
            StringWriter sw = new StringWriter();
            printer.print(new PrintWriter(sw));
            printer.getText().clear();
            System.out.print(sw.toString());
        }
    }
}
 

import org.objectweb.asm.util.Printer; //导入依赖的package包/类
private static String insToChars(String name) {
	for (int i = 0; i < Printer.OPCODES.length; i++) {
		if (name.equalsIgnoreCase(Printer.OPCODES[i])) {
			return new String(new char[] { opcodeToChar(i) });
		}
	}

	int[] group = groups.get(name.toLowerCase());
	if (group != null) {
		StringBuilder bldr = new StringBuilder("(");
		for (int i = 0; i < group.length; i++) {
			bldr.append(opcodeToChar(group[i]));
			if (i != group.length - 1)
				bldr.append("|");
		}
		bldr.append(")");
		return bldr.toString();
	}

	if (name.equalsIgnoreCase("AbstractInsnNode")) {
		return ".";
	}

	throw new IllegalArgumentException(name + " is not an instruction.");
}
 

import org.objectweb.asm.util.Printer; //导入依赖的package包/类
public static void printMethod(ObfMapping method, byte[] bytes, Printer printer, File toFile) {
    try {
        if (!toFile.getParentFile().exists())
            toFile.getParentFile().mkdirs();
        if (!toFile.exists())
            toFile.createNewFile();

        PrintWriter printWriter = new PrintWriter(toFile);

        ClassVisitor cv = new MethodASMifier(method, printer, printWriter);
        ClassReader cr = new ClassReader(bytes);
        cr.accept(cv, 0);

        printWriter.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}
 

import org.objectweb.asm.util.Printer; //导入依赖的package包/类
@Override
public void visitLdcInsn(final Object cst) {
    buf.setLength(0);
    buf.append(tab2).append("LDC ");
    if (cst instanceof String) {
        Printer.appendString(buf, (String) cst);
    } else if(cst instanceof Float) {
    	buf.append(cst).append("F");
    } else if(cst instanceof Double) {
    	buf.append(cst).append("D");
    } else if(cst instanceof Long) {
    	buf.append(cst).append("L");
    } else if (cst instanceof Type) {
        buf.append(((Type) cst).getDescriptor()).append(".class");
    } else {
        buf.append(cst);
    }
    buf.append('\n');
    text.add(buf.toString());
}
 

import org.objectweb.asm.util.Printer; //导入依赖的package包/类
@Override
public void visitEnd() {
	super.visitEnd();

	if (!found && errorNoMatch) {
		StringWriter output = new StringWriter();
		PrintWriter writer = new PrintWriter(output);
		writer.append("Cannot find nodes");
		if (methods.size() > 0) {
			writer.append(" for methods ").append(methods.toString());
		}
		writer.println();

		Printer printer = new Textifier();
		TraceMethodVisitor visitor = new TraceMethodVisitor(printer);
		for (AbstractInsnNode node : nodes) {
			node.accept(visitor);
		}

		printer.print(writer);

		throw new IllegalStateException(output.toString());
	}
}
 

import org.objectweb.asm.util.Printer; //导入依赖的package包/类
public static void viewByteCode(byte[] bytecode) {
    ClassReader cr = new ClassReader(bytecode);
    ClassNode cn = new ClassNode();
    cr.accept(cn, 0);
    final List<MethodNode> mns = cn.methods;
    Printer printer = new Textifier();
    TraceMethodVisitor mp = new TraceMethodVisitor(printer);
    for (MethodNode mn : mns) {
        InsnList inList = mn.instructions;
        System.out.println(mn.name);
        for (int i = 0; i < inList.size(); i++) {
            inList.get(i).accept(mp);
            StringWriter sw = new StringWriter();
            printer.print(new PrintWriter(sw));
            printer.getText().clear();
            System.out.print(sw.toString());
        }
    }
}
 

import org.objectweb.asm.util.Printer; //导入依赖的package包/类
private static void checkIntComparisonOpcode(Type comparisonType, int opcode) {
  switch (opcode) {
    case Opcodes.IFEQ:
    case Opcodes.IFNE:
      return;
    case Opcodes.IFGT:
    case Opcodes.IFGE:
    case Opcodes.IFLT:
    case Opcodes.IFLE:
      if (comparisonType.getSort() == Type.ARRAY || comparisonType.getSort() == Type.OBJECT) {
        throw new IllegalArgumentException(
            "Type: " + comparisonType + " cannot be compared via " + Printer.OPCODES[opcode]);
      }
      return;
    default:
      throw new IllegalArgumentException(
          "Unsupported opcode for comparison operation: " + opcode);
  }
}
 

import org.objectweb.asm.util.Printer; //导入依赖的package包/类
public static String getMethodInstructionList(final MethodNode methodNode) {
    Preconditions.checkNotNull(methodNode, "methodNode");
    final Printer printer = new NonMaxTextifier();
    final TraceMethodVisitor traceMethodVisitor = new TraceMethodVisitor(printer);
    methodNode.accept(traceMethodVisitor);
    final StringWriter stringWriter = new StringWriter();
    final PrintWriter printWriter = new PrintWriter(stringWriter);
    printer.print(printWriter);
    printWriter.flush();
    final String[] lines = PATTERN.split(stringWriter.toString());
    int lineNr = 0;
    for (int i = 0; i < lines.length; i++) {
        if (!lines[i].startsWith("  @")) {
            lines[i] = String.format("%2d %s", lineNr++, lines[i]);
        }
    }
    return "Method '" + methodNode.name + "':\n"
        + NEWLINE.join(lines) + '\n';
}
 

import org.objectweb.asm.util.Printer; //导入依赖的package包/类
protected void print(final Object cst) {
    if (cst instanceof String) {
        StringBuffer buf = new StringBuffer();
        Printer.appendString(buf, (String) cst);
        pw.print(buf.toString());
    } else if (cst instanceof Float) {
        Float f = (Float) cst;
        if (f.isNaN() || f.isInfinite()) {
            pw.print("0.0"); // TODO Jasmin bug workaround
        } else {
            pw.print(f);
        }
    } else if (cst instanceof Double) {
        Double d = (Double) cst;
        if (d.isNaN() || d.isInfinite()) {
            pw.print("0.0"); // TODO Jasmin bug workaround
        } else {
            pw.print(d);
        }
    } else {
        pw.print(cst);
    }
}
 

import org.objectweb.asm.util.Printer; //导入依赖的package包/类
/**
 * Converts an instruction to character(s) used to build the regular
 * expression.
 * @param name The name of the instruction.
 * @return The character(s) which represents this instruction.
 * @throws IllegalArgumentException if the name was not found.
 */
private static String insToChars(String name) {
	for (int i = 0; i < Printer.OPCODES.length; i++) {
		if (name.equalsIgnoreCase(Printer.OPCODES[i])) {
			return new String(new char[] { opcodeToChar(i) });
		}
	}

	int[] group = groups.get(name.toLowerCase());
	if (group != null) {
		StringBuilder bldr = new StringBuilder("(");
		for (int i = 0; i < group.length; i++) {
			bldr.append(opcodeToChar(group[i]));
			if (i != group.length - 1)
				bldr.append("|");
		}
		bldr.append(")");
		return bldr.toString();
	}

	if (name.equalsIgnoreCase("AbstractInsnNode")) {
		return ".";
	}

	throw new IllegalArgumentException(name + " is not an instruction.");
}
 

import org.objectweb.asm.util.Printer; //导入依赖的package包/类
@Override
public final void visitTableSwitchInsn(
    final int min,
    final int max,
    final Label dflt,
    final Label... labels)
{
    AttributesImpl attrs = new AttributesImpl();
    attrs.addAttribute("", "min", "min", "", Integer.toString(min));
    attrs.addAttribute("", "max", "max", "", Integer.toString(max));
    attrs.addAttribute("", "dflt", "dflt", "", getLabel(dflt));
    String o = Printer.OPCODES[Opcodes.TABLESWITCH];
    sa.addStart(o, attrs);
    for (int i = 0; i < labels.length; i++) {
        AttributesImpl att2 = new AttributesImpl();
        att2.addAttribute("", "name", "name", "", getLabel(labels[i]));
        sa.addElement("label", att2);
    }
    sa.addEnd(o);
}
 

import org.objectweb.asm.util.Printer; //导入依赖的package包/类
@Override
public final void visitLookupSwitchInsn(
    final Label dflt,
    final int[] keys,
    final Label[] labels)
{
    AttributesImpl att = new AttributesImpl();
    att.addAttribute("", "dflt", "dflt", "", getLabel(dflt));
    String o = Printer.OPCODES[Opcodes.LOOKUPSWITCH];
    sa.addStart(o, att);
    for (int i = 0; i < labels.length; i++) {
        AttributesImpl att2 = new AttributesImpl();
        att2.addAttribute("", "name", "name", "", getLabel(labels[i]));
        att2.addAttribute("", "key", "key", "", Integer.toString(keys[i]));
        sa.addElement("label", att2);
    }
    sa.addEnd(o);
}