python javalang库 获取java类的所有方法签名
import javalang
def get_type_string(type):
# 处理基本类型和引用类型
type_str = ''
if isinstance(type, javalang.tree.ReferenceType):
type_str = type.name
if type.arguments:
args = ', '.join(get_type_string(arg.type) for arg in type.arguments if arg.type is not None)
type_str += f"<{args}>"
elif isinstance(type, javalang.tree.BasicType):
type_str = type.name
else:
type_str = str(type)
# 处理数组类型
dimensions = ''.join('[]' for _ in range(len(type.dimensions))) if hasattr(type, 'dimensions') else ''
return f"{type_str}{dimensions}"
def get_method_signatures(java_code):
tree = javalang.parse.parse(java_code)
method_signatures = []
for _, class_declaration in tree.filter(javalang.tree.ClassDeclaration):
for method in class_declaration.methods:
# 获取方法的返回类型，包括泛型信息和数组
return_type = get_type_string(method.return_type)
# 获取方法的参数类型，包括泛型信息和数组
params = []
for parameter in method.parameters:
param_type = get_type_string(parameter.type)
if parameter.varargs:
param_type += "..."
params.append(param_type)
# 构建方法签名
method_signature = f"{method.name}({', '.join(params)}) : {return_type}"
method_signatures.append(method_signature)
return method_signatures
java_code = """
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.lang3;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.EnumSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
/**
* <p>Utility library to provide helper methods for Java enums.</p>
*
* <p>#ThreadSafe#</p>
*
* @since 3.0
* @version $Id$
*/
public class EnumUtils {
private static final String NULL_ELEMENTS_NOT_PERMITTED = "null elements not permitted";
private static final String CANNOT_STORE_S_S_VALUES_IN_S_BITS = "Cannot store %s %s values in %s bits";
private static final String S_DOES_NOT_SEEM_TO_BE_AN_ENUM_TYPE = "%s does not seem to be an Enum type";
private static final String ENUM_CLASS_MUST_BE_DEFINED = "EnumClass must be defined.";
/**
* This constructor is public to permit tools that require a JavaBean
* instance to operate.
*/
public EnumUtils() {
}
/**
* <p>Gets the {@code Map} of enums by name.</p>
*
* <p>This method is useful when you need a map of enums by name.</p>
*
* @param <E> the type of the enumeration
* @param enumClass the class of the enum to query, not null
* @return the modifiable map of enum names to enums, never null
*/
public static <E extends Enum<E>> Map<String, E> getEnumMap(final Class<E> enumClass) {
final Map<String, E> map = new LinkedHashMap<String, E>();
for (final E e: enumClass.getEnumConstants()) {
map.put(e.name(), e);
}
return map;
}
/**
* <p>Gets the {@code List} of enums.</p>
*
* <p>This method is useful when you need a list of enums rather than an array.</p>
*
* @param <E> the type of the enumeration
* @param enumClass the class of the enum to query, not null
* @return the modifiable list of enums, never null
*/
public static <E extends Enum<E>> List<E> getEnumList(final Class<E> enumClass) {
return new ArrayList<E>(Arrays.asList(enumClass.getEnumConstants()));
}
/**
* <p>Checks if the specified name is a valid enum for the class.</p>
*
* <p>This method differs from {@link Enum#valueOf} in that checks if the name is
* a valid enum without needing to catch the exception.</p>
*
* @param <E> the type of the enumeration
* @param enumClass the class of the enum to query, not null
* @param enumName the enum name, null returns false
* @return true if the enum name is valid, otherwise false
*/
public static <E extends Enum<E>> boolean isValidEnum(final Class<E> enumClass, final String enumName) {
if (enumName == null) {
return false;
}
try {
Enum.valueOf(enumClass, enumName);
return true;
} catch (final IllegalArgumentException ex) {
return false;
}
}
/**
* <p>Gets the enum for the class, returning {@code null} if not found.</p>
*
* <p>This method differs from {@link Enum#valueOf} in that it does not throw an exception
* for an invalid enum name.</p>
*
* @param <E> the type of the enumeration
* @param enumClass the class of the enum to query, not null
* @param enumName the enum name, null returns null
* @return the enum, null if not found
*/
public static <E extends Enum<E>> E getEnum(final Class<E> enumClass, final String enumName) {
if (enumName == null) {
return null;
}
try {
return Enum.valueOf(enumClass, enumName);
} catch (final IllegalArgumentException ex) {
return null;
}
}
/**
* <p>Creates a long bit vector representation of the given subset of an Enum.</p>
*
* <p>This generates a value that is usable by {@link EnumUtils#processBitVector}.</p>
*
* <p>Do not use this method if you have more than 64 values in your Enum, as this
* would create a value greater than a long can hold.</p>
*
* @param enumClass the class of the enum we are working with, not {@code null}
* @param values the values we want to convert, not {@code null}, neither containing {@code null}
* @param <E> the type of the enumeration
* @return a long whose value provides a binary representation of the given set of enum values.
* @throws NullPointerException if {@code enumClass} or {@code values} is {@code null}
* @throws IllegalArgumentException if {@code enumClass} is not an enum class or has more than 64 values,
* or if any {@code values} {@code null}
* @since 3.0.1
* @see #generateBitVectors(Class, Iterable)
*/
public static <E extends Enum<E>> long generateBitVector(final Class<E> enumClass, final Iterable<E> values) {
checkBitVectorable(enumClass);
Validate.notNull(values);
long total = 0;
for (final E constant : values) {
Validate.isTrue(constant != null, NULL_ELEMENTS_NOT_PERMITTED);
total |= 1 << constant.ordinal();
}
return total;
}
/**
* <p>Creates a bit vector representation of the given subset of an Enum using as many {@code long}s as needed.</p>
*
* <p>This generates a value that is usable by {@link EnumUtils#processBitVectors}.</p>
*
* <p>Use this method if you have more than 64 values in your Enum.</p>
*
* @param enumClass the class of the enum we are working with, not {@code null}
* @param values the values we want to convert, not {@code null}, neither containing {@code null}
* @param <E> the type of the enumeration
* @return a long[] whose values provide a binary representation of the given set of enum values
* with least significant digits rightmost.
* @throws NullPointerException if {@code enumClass} or {@code values} is {@code null}
* @throws IllegalArgumentException if {@code enumClass} is not an enum class, or if any {@code values} {@code null}
* @since 3.2
*/
public static <E extends Enum<E>> long[] generateBitVectors(final Class<E> enumClass, final Iterable<E> values) {
asEnum(enumClass);
Validate.notNull(values);
final EnumSet<E> condensed = EnumSet.noneOf(enumClass);
for (final E constant : values) {
Validate.isTrue(constant != null, NULL_ELEMENTS_NOT_PERMITTED);
condensed.add(constant);
}
final long[] result = new long[(enumClass.getEnumConstants().length - 1) / Long.SIZE + 1];
for (final E value : condensed) {
result[value.ordinal() / Long.SIZE] |= 1 << (value.ordinal() % Long.SIZE);
}
ArrayUtils.reverse(result);
return result;
}
/**
* <p>Creates a long bit vector representation of the given array of Enum values.</p>
*
* <p>This generates a value that is usable by {@link EnumUtils#processBitVector}.</p>
*
* <p>Do not use this method if you have more than 64 values in your Enum, as this
* would create a value greater than a long can hold.</p>
*
* @param enumClass the class of the enum we are working with, not {@code null}
* @param values the values we want to convert, not {@code null}
* @param <E> the type of the enumeration
* @return a long whose value provides a binary representation of the given set of enum values.
* @throws NullPointerException if {@code enumClass} or {@code values} is {@code null}
* @throws IllegalArgumentException if {@code enumClass} is not an enum class or has more than 64 values
* @since 3.0.1
* @see #generateBitVectors(Class, Iterable)
*/
public static <E extends Enum<E>> long generateBitVector(final Class<E> enumClass, final E... values) {
Validate.noNullElements(values);
return generateBitVector(enumClass, Arrays.<E> asList(values));
}
/**
* <p>Creates a bit vector representation of the given subset of an Enum using as many {@code long}s as needed.</p>
*
* <p>This generates a value that is usable by {@link EnumUtils#processBitVectors}.</p>
*
* <p>Use this method if you have more than 64 values in your Enum.</p>
*
* @param enumClass the class of the enum we are working with, not {@code null}
* @param values the values we want to convert, not {@code null}, neither containing {@code null}
* @param <E> the type of the enumeration
* @return a long[] whose values provide a binary representation of the given set of enum values
* with least significant digits rightmost.
* @throws NullPointerException if {@code enumClass} or {@code values} is {@code null}
* @throws IllegalArgumentException if {@code enumClass} is not an enum class, or if any {@code values} {@code null}
* @since 3.2
*/
public static <E extends Enum<E>> long[] generateBitVectors(final Class<E> enumClass, final E... values) {
asEnum(enumClass);
Validate.noNullElements(values);
final EnumSet<E> condensed = EnumSet.noneOf(enumClass);
Collections.addAll(condensed, values);
final long[] result = new long[(enumClass.getEnumConstants().length - 1) / Long.SIZE + 1];
for (final E value : condensed) {
result[value.ordinal() / Long.SIZE] |= 1 << (value.ordinal() % Long.SIZE);
}
ArrayUtils.reverse(result);
return result;
}
/**
* <p>Convert a long value created by {@link EnumUtils#generateBitVector} into the set of
* enum values that it represents.</p>
*
* <p>If you store this value, beware any changes to the enum that would affect ordinal values.</p>
* @param enumClass the class of the enum we are working with, not {@code null}
* @param value the long value representation of a set of enum values
* @param <E> the type of the enumeration
* @return a set of enum values
* @throws NullPointerException if {@code enumClass} is {@code null}
* @throws IllegalArgumentException if {@code enumClass} is not an enum class or has more than 64 values
* @since 3.0.1
*/
public static <E extends Enum<E>> EnumSet<E> processBitVector(final Class<E> enumClass, final long value) {
checkBitVectorable(enumClass).getEnumConstants();
return processBitVectors(enumClass, value);
}
/**
* <p>Convert a {@code long[]} created by {@link EnumUtils#generateBitVectors} into the set of
* enum values that it represents.</p>
*
* <p>If you store this value, beware any changes to the enum that would affect ordinal values.</p>
* @param enumClass the class of the enum we are working with, not {@code null}
* @param values the long[] bearing the representation of a set of enum values, least significant digits rightmost, not {@code null}
* @param <E> the type of the enumeration
* @return a set of enum values
* @throws NullPointerException if {@code enumClass} is {@code null}
* @throws IllegalArgumentException if {@code enumClass} is not an enum class
* @since 3.2
*/
public static <E extends Enum<E>> EnumSet<E> processBitVectors(final Class<E> enumClass, long... values) {
final EnumSet<E> results = EnumSet.noneOf(asEnum(enumClass));
values = ArrayUtils.clone(Validate.notNull(values));
ArrayUtils.reverse(values);
for (final E constant : enumClass.getEnumConstants()) {
final int block = constant.ordinal() / Long.SIZE;
if (block < values.length && (values[block] & 1 << (constant.ordinal() % Long.SIZE)) != 0) {
results.add(constant);
}
}
return results;
}
/**
* Validate that {@code enumClass} is compatible with representation in a {@code long}.
* @param <E> the type of the enumeration
* @param enumClass to check
* @return {@code enumClass}
* @throws NullPointerException if {@code enumClass} is {@code null}
* @throws IllegalArgumentException if {@code enumClass} is not an enum class or has more than 64 values
* @since 3.0.1
*/
private static <E extends Enum<E>> Class<E> checkBitVectorable(final Class<E> enumClass) {
final E[] constants = asEnum(enumClass).getEnumConstants();
Validate.isTrue(constants.length <= Long.SIZE, CANNOT_STORE_S_S_VALUES_IN_S_BITS, constants.length,
enumClass.getSimpleName(), Long.SIZE);
return enumClass;
}
/**
* Validate {@code enumClass}.
* @param <E> the type of the enumeration
* @param enumClass to check
* @return {@code enumClass}
* @throws NullPointerException if {@code enumClass} is {@code null}
* @throws IllegalArgumentException if {@code enumClass} is not an enum class
* @since 3.2
*/
private static <E extends Enum<E>> Class<E> asEnum(final Class<E> enumClass) {
Validate.notNull(enumClass, ENUM_CLASS_MUST_BE_DEFINED);
Validate.isTrue(enumClass.isEnum(), S_DOES_NOT_SEEM_TO_BE_AN_ENUM_TYPE, enumClass);
return enumClass;
}
}
"""
# 获取方法签名
signatures = get_method_signatures(java_code)
# 打印方法签名
for signature in signatures:
print(signature)
输出：
getArray(Object[]) : long[]
getEnumMap(Class<E>) : Map<String, E>
getEnumList(Class<E>) : List<E>
isValidEnum(Class<E>, String) : boolean
getEnum(Class<E>, String) : E
generateBitVector(Class<E>, Iterable<E>) : long
generateBitVectors(Class<E>, Iterable<E>) : long[]
generateBitVector(Class<E>, E...) : long
generateBitVectors(Class<E>, E...) : long[]
processBitVector(Class<E>, long) : EnumSet<E>
processBitVectors(Class<E>, long...) : EnumSet<E>
checkBitVectorable(Class<E>) : Class<E>
asEnum(Class<E>) : Class<E>
