Java BytecodeDescriptor.unparse方法代码示例

import sun.invoke.util.BytecodeDescriptor; //导入方法依赖的package包/类
/** Utility method to produce the signature of this member,
 *  used within the class file format to describe its type.
 */
public String getSignature() {
    if (type == null) {
        expandFromVM();
        if (type == null) {
            return null;
        }
    }
    if (isInvocable())
        return BytecodeDescriptor.unparse(getMethodType());
    else
        return BytecodeDescriptor.unparse(getFieldType());
}
 

import sun.invoke.util.BytecodeDescriptor; //导入方法依赖的package包/类
/** Utility method to produce the signature of this member,
 *  used within the class file format to describe its type.
 */
public String getSignature() {
    if (type == null) {
        expandFromVM();
        if (type == null)  return null;
    }
    if (type instanceof String)
        return (String) type;
    if (isInvocable())
        return BytecodeDescriptor.unparse(getMethodType());
    else
        return BytecodeDescriptor.unparse(getFieldType());
}
 

import sun.invoke.util.BytecodeDescriptor; //导入方法依赖的package包/类
static String toFieldDescriptorString(Class<?> cls) {
    return BytecodeDescriptor.unparse(cls);
}
 

import sun.invoke.util.BytecodeDescriptor; //导入方法依赖的package包/类
List<MemberName> getMembers(Class<?> defc,
        String matchName, Object matchType,
        int matchFlags, Class<?> lookupClass) {
    matchFlags &= ALLOWED_FLAGS;
    String matchSig = null;
    if (matchType != null) {
        matchSig = BytecodeDescriptor.unparse(matchType);
        if (matchSig.startsWith("("))
            matchFlags &= ~(ALL_KINDS & ~IS_INVOCABLE);
        else
            matchFlags &= ~(ALL_KINDS & ~IS_FIELD);
    }
    final int BUF_MAX = 0x2000;
    int len1 = matchName == null ? 10 : matchType == null ? 4 : 1;
    MemberName[] buf = newMemberBuffer(len1);
    int totalCount = 0;
    ArrayList<MemberName[]> bufs = null;
    int bufCount = 0;
    for (;;) {
        bufCount = MethodHandleNatives.getMembers(defc,
                matchName, matchSig, matchFlags,
                lookupClass,
                totalCount, buf);
        if (bufCount <= buf.length) {
            if (bufCount < 0)  bufCount = 0;
            totalCount += bufCount;
            break;
        }
        // JVM returned to us with an intentional overflow!
        totalCount += buf.length;
        int excess = bufCount - buf.length;
        if (bufs == null)  bufs = new ArrayList<>(1);
        bufs.add(buf);
        int len2 = buf.length;
        len2 = Math.max(len2, excess);
        len2 = Math.max(len2, totalCount / 4);
        buf = newMemberBuffer(Math.min(BUF_MAX, len2));
    }
    ArrayList<MemberName> result = new ArrayList<>(totalCount);
    if (bufs != null) {
        for (MemberName[] buf0 : bufs) {
            Collections.addAll(result, buf0);
        }
    }
    result.addAll(Arrays.asList(buf).subList(0, bufCount));
    // Signature matching is not the same as type matching, since
    // one signature might correspond to several types.
    // So if matchType is a Class or MethodType, refilter the results.
    if (matchType != null && matchType != matchSig) {
        for (Iterator<MemberName> it = result.iterator(); it.hasNext();) {
            MemberName m = it.next();
            if (!matchType.equals(m.getType()))
                it.remove();
        }
    }
    return result;
}
 

import sun.invoke.util.BytecodeDescriptor; //导入方法依赖的package包/类
List<MemberName> getMembers(Class<?> defc,
        String matchName, Object matchType,
        int matchFlags, Class<?> lookupClass) {
    matchFlags &= ALLOWED_FLAGS;
    String matchSig = null;
    if (matchType != null) {
        matchSig = BytecodeDescriptor.unparse(matchType);
        if (matchSig.startsWith("("))
            matchFlags &= ~(ALL_KINDS & ~IS_INVOCABLE);
        else
            matchFlags &= ~(ALL_KINDS & ~IS_FIELD);
    }
    final int BUF_MAX = 0x2000;
    int len1 = matchName == null ? 10 : matchType == null ? 4 : 1;
    MemberName[] buf = newMemberBuffer(len1);
    int totalCount = 0;
    ArrayList<MemberName[]> bufs = null;
    int bufCount = 0;
    for (;;) {
        bufCount = MethodHandleNatives.getMembers(defc,
                matchName, matchSig, matchFlags,
                lookupClass,
                totalCount, buf);
        if (bufCount <= buf.length) {
            if (bufCount < 0)  bufCount = 0;
            totalCount += bufCount;
            break;
        }
        // JVM returned to us with an intentional overflow!
        totalCount += buf.length;
        int excess = bufCount - buf.length;
        if (bufs == null)  bufs = new ArrayList<>(1);
        bufs.add(buf);
        int len2 = buf.length;
        len2 = Math.max(len2, excess);
        len2 = Math.max(len2, totalCount / 4);
        buf = newMemberBuffer(Math.min(BUF_MAX, len2));
    }
    ArrayList<MemberName> result = new ArrayList<>(totalCount);
    if (bufs != null) {
        for (MemberName[] buf0 : bufs) {
            Collections.addAll(result, buf0);
        }
    }
    for (int i = 0; i < bufCount; i++) {
        result.add(buf[i]);
    }
    // Signature matching is not the same as type matching, since
    // one signature might correspond to several types.
    // So if matchType is a Class or MethodType, refilter the results.
    if (matchType != null && matchType != matchSig) {
        for (Iterator<MemberName> it = result.iterator(); it.hasNext();) {
            MemberName m = it.next();
            if (!matchType.equals(m.getType()))
                it.remove();
        }
    }
    return result;
}
 

import sun.invoke.util.BytecodeDescriptor; //导入方法依赖的package包/类
List<MemberName> getMembers(Class<?> defc,
        String matchName, Object matchType,
        int matchFlags, Class<?> lookupClass) {
    matchFlags &= ALLOWED_FLAGS;
    String matchSig = null;
    if (matchType != null) {
        matchSig = BytecodeDescriptor.unparse(matchType);
        if (matchSig.startsWith("("))
            matchFlags &= ~(ALL_KINDS & ~IS_INVOCABLE);
        else
            matchFlags &= ~(ALL_KINDS & ~IS_FIELD);
    }
    final int BUF_MAX = 0x2000;
    int len1 = matchName == null ? 10 : matchType == null ? 4 : 1;
    MemberName[] buf = newMemberBuffer(len1);
    int totalCount = 0;
    ArrayList<MemberName[]> bufs = null;
    int bufCount = 0;
    for (;;) {
        bufCount = MethodHandleNatives.getMembers(defc,
                matchName, matchSig, matchFlags,
                lookupClass,
                totalCount, buf);
        if (bufCount <= buf.length) {
            if (bufCount < 0)  bufCount = 0;
            totalCount += bufCount;
            break;
        }
        // JVM returned to us with an intentional overflow!
        totalCount += buf.length;
        int excess = bufCount - buf.length;
        if (bufs == null)  bufs = new ArrayList<MemberName[]>(1);
        bufs.add(buf);
        int len2 = buf.length;
        len2 = Math.max(len2, excess);
        len2 = Math.max(len2, totalCount / 4);
        buf = newMemberBuffer(Math.min(BUF_MAX, len2));
    }
    ArrayList<MemberName> result = new ArrayList<MemberName>(totalCount);
    if (bufs != null) {
        for (MemberName[] buf0 : bufs) {
            Collections.addAll(result, buf0);
        }
    }
    result.addAll(Arrays.asList(buf).subList(0, bufCount));
    // Signature matching is not the same as type matching, since
    // one signature might correspond to several types.
    // So if matchType is a Class or MethodType, refilter the results.
    if (matchType != null && matchType != matchSig) {
        for (Iterator<MemberName> it = result.iterator(); it.hasNext();) {
            MemberName m = it.next();
            if (!matchType.equals(m.getType()))
                it.remove();
        }
    }
    return result;
}
 

import sun.invoke.util.BytecodeDescriptor; //导入方法依赖的package包/类
/**
 * Produces a bytecode descriptor representation of the method type.
 * <p>
 * Note that this is not a strict inverse of {@link #fromMethodDescriptorString fromMethodDescriptorString}.
 * Two distinct classes which share a common name but have different class loaders
 * will appear identical when viewed within descriptor strings.
 * <p>
 * This method is included for the benefit of applications that must
 * generate bytecodes that process method handles and {@code invokedynamic}.
 * {@link #fromMethodDescriptorString(java.lang.String, java.lang.ClassLoader) fromMethodDescriptorString},
 * because the latter requires a suitable class loader argument.
 * @return the bytecode type descriptor representation
 */
public String toMethodDescriptorString() {
    String desc = methodDescriptor;
    if (desc == null) {
        desc = BytecodeDescriptor.unparse(this);
        methodDescriptor = desc;
    }
    return desc;
}
 

import sun.invoke.util.BytecodeDescriptor; //导入方法依赖的package包/类
/**
 * General meta-factory constructor, supporting both standard cases and
 * allowing for uncommon options such as serialization or bridging.
 *
 * @param caller Stacked automatically by VM; represents a lookup context
 *               with the accessibility privileges of the caller.
 * @param invokedType Stacked automatically by VM; the signature of the
 *                    invoked method, which includes the expected static
 *                    type of the returned lambda object, and the static
 *                    types of the captured arguments for the lambda.  In
 *                    the event that the implementation method is an
 *                    instance method, the first argument in the invocation
 *                    signature will correspond to the receiver.
 * @param samMethodName Name of the method in the functional interface to
 *                      which the lambda or method reference is being
 *                      converted, represented as a String.
 * @param samMethodType Type of the method in the functional interface to
 *                      which the lambda or method reference is being
 *                      converted, represented as a MethodType.
 * @param implMethod The implementation method which should be called (with
 *                   suitable adaptation of argument types, return types,
 *                   and adjustment for captured arguments) when methods of
 *                   the resulting functional interface instance are invoked.
 * @param instantiatedMethodType The signature of the primary functional
 *                               interface method after type variables are
 *                               substituted with their instantiation from
 *                               the capture site
 * @param isSerializable Should the lambda be made serializable?  If set,
 *                       either the target type or one of the additional SAM
 *                       types must extend {@code Serializable}.
 * @param markerInterfaces Additional interfaces which the lambda object
 *                       should implement.
 * @param additionalBridges Method types for additional signatures to be
 *                          bridged to the implementation method
 * @throws LambdaConversionException If any of the meta-factory protocol
 * invariants are violated
 */
public InnerClassLambdaMetafactory(MethodHandles.Lookup caller,
                                   MethodType invokedType,
                                   String samMethodName,
                                   MethodType samMethodType,
                                   MethodHandle implMethod,
                                   MethodType instantiatedMethodType,
                                   boolean isSerializable,
                                   Class<?>[] markerInterfaces,
                                   MethodType[] additionalBridges)
        throws LambdaConversionException {
    super(caller, invokedType, samMethodName, samMethodType,
          implMethod, instantiatedMethodType,
          isSerializable, markerInterfaces, additionalBridges);
    implMethodClassName = implDefiningClass.getName().replace('.', '/');
    implMethodName = implInfo.getName();
    implMethodDesc = implMethodType.toMethodDescriptorString();
    implMethodReturnClass = (implKind == MethodHandleInfo.REF_newInvokeSpecial)
            ? implDefiningClass
            : implMethodType.returnType();
    constructorType = invokedType.changeReturnType(Void.TYPE);
    lambdaClassName = targetClass.getName().replace('.', '/') + "$$Lambda$" + counter.incrementAndGet();
    cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    int parameterCount = invokedType.parameterCount();
    if (parameterCount > 0) {
        argNames = new String[parameterCount];
        argDescs = new String[parameterCount];
        for (int i = 0; i < parameterCount; i++) {
            argNames[i] = "arg$" + (i + 1);
            argDescs[i] = BytecodeDescriptor.unparse(invokedType.parameterType(i));
        }
    } else {
        argNames = argDescs = EMPTY_STRING_ARRAY;
    }
}
 

import sun.invoke.util.BytecodeDescriptor; //导入方法依赖的package包/类
/**
 * General meta-factory constructor, supporting both standard cases and
 * allowing for uncommon options such as serialization or bridging.
 *
 * @param caller Stacked automatically by VM; represents a lookup context
 *               with the accessibility privileges of the caller.
 * @param invokedType Stacked automatically by VM; the signature of the
 *                    invoked method, which includes the expected static
 *                    type of the returned lambda object, and the static
 *                    types of the captured arguments for the lambda.  In
 *                    the event that the implementation method is an
 *                    instance method, the first argument in the invocation
 *                    signature will correspond to the receiver.
 * @param samMethodName Name of the method in the functional interface to
 *                      which the lambda or method reference is being
 *                      converted, represented as a String.
 * @param samMethodType Type of the method in the functional interface to
 *                      which the lambda or method reference is being
 *                      converted, represented as a MethodType.
 * @param implMethod The implementation method which should be called (with
 *                   suitable adaptation of argument types, return types,
 *                   and adjustment for captured arguments) when methods of
 *                   the resulting functional interface instance are invoked.
 * @param instantiatedMethodType The signature of the primary functional
 *                               interface method after type variables are
 *                               substituted with their instantiation from
 *                               the capture site
 * @param isSerializable Should the lambda be made serializable?  If set,
 *                       either the target type or one of the additional SAM
 *                       types must extend {@code Serializable}.
 * @param markerInterfaces Additional interfaces which the lambda object
 *                       should implement.
 * @param additionalBridges Method types for additional signatures to be
 *                          bridged to the implementation method
 * @throws LambdaConversionException If any of the meta-factory protocol
 * invariants are violated
 */
public InnerClassLambdaMetafactory(MethodHandles.Lookup caller,
                                   MethodType invokedType,
                                   String samMethodName,
                                   MethodType samMethodType,
                                   MethodHandle implMethod,
                                   MethodType instantiatedMethodType,
                                   boolean isSerializable,
                                   Class<?>[] markerInterfaces,
                                   MethodType[] additionalBridges)
        throws LambdaConversionException {
    super(caller, invokedType, samMethodName, samMethodType,
          implMethod, instantiatedMethodType,
          isSerializable, markerInterfaces, additionalBridges);
    implMethodClassName = implClass.getName().replace('.', '/');
    implMethodName = implInfo.getName();
    implMethodDesc = implInfo.getMethodType().toMethodDescriptorString();
    constructorType = invokedType.changeReturnType(Void.TYPE);
    lambdaClassName = targetClass.getName().replace('.', '/') + "$$Lambda$" + counter.incrementAndGet();
    cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    int parameterCount = invokedType.parameterCount();
    if (parameterCount > 0) {
        argNames = new String[parameterCount];
        argDescs = new String[parameterCount];
        for (int i = 0; i < parameterCount; i++) {
            argNames[i] = "arg$" + (i + 1);
            argDescs[i] = BytecodeDescriptor.unparse(invokedType.parameterType(i));
        }
    } else {
        argNames = argDescs = EMPTY_STRING_ARRAY;
    }
}
 

import sun.invoke.util.BytecodeDescriptor; //导入方法依赖的package包/类
/**
 * Produces a bytecode descriptor representation of the method type.
 * <p>
 * Note that this is not a strict inverse of {@link #fromMethodDescriptorString fromMethodDescriptorString}.
 * Two distinct classes which share a common name but have different class loaders
 * will appear identical when viewed within descriptor strings.
 * <p>
 * This method is included for the benfit of applications that must
 * generate bytecodes that process method handles and {@code invokedynamic}.
 * {@link #fromMethodDescriptorString(java.lang.String, java.lang.ClassLoader) fromMethodDescriptorString},
 * because the latter requires a suitable class loader argument.
 * @return the bytecode type descriptor representation
 */
public String toMethodDescriptorString() {
    return BytecodeDescriptor.unparse(this);
}