co.cask.common.internal.asm.Methods.java Source code

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Here is the source code for co.cask.common.internal.asm.Methods.java

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/*
 * Copyright  2014 Cask Data, Inc.
 *
 * Licensed 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 co.cask.common.internal.asm;

import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.collect.Iterators;
import org.objectweb.asm.Type;
import org.objectweb.asm.commons.Method;

/**
 * Util class containing helper functions to interact with ASM {@link Method}.
 */
public final class Methods {

    public static Method getMethod(Class<?> returnType, String name, Class<?>... args) {
        StringBuilder builder = new StringBuilder(returnType.getName()).append(' ').append(name).append(" (");
        Joiner.on(',').appendTo(builder,
                Iterators.transform(Iterators.forArray(args), new Function<Class<?>, String>() {
                    @Override
                    public String apply(Class<?> input) {
                        if (input.isArray()) {
                            return Type.getType(input.getName()).getClassName();
                        }
                        return input.getName();
                    }
                }));
        builder.append(')');
        return Method.getMethod(builder.toString());
    }

    private Methods() {
    }
}