org.springframework.data.gemfire.function.PdxFunctionArgumentResolver.java Source code

Introduction

Here is the source code for org.springframework.data.gemfire.function.PdxFunctionArgumentResolver.java

Source

/*
 * Copyright 2010-2019 the original author or authors.
 *
 * 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
 *
 *       https://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.springframework.data.gemfire.function;

import java.lang.reflect.Method;

import org.apache.geode.cache.CacheClosedException;
import org.apache.geode.cache.CacheFactory;
import org.apache.geode.cache.execute.FunctionContext;
import org.apache.geode.pdx.PdxInstance;
import org.springframework.util.ClassUtils;

/**
 * The {@link PdxFunctionArgumentResolver} class is a SDG {@link FunctionArgumentResolver} that automatically resolves
 * PDX types when Pivotal GemFire is configured with read-serialized set to true, but the application domain classes
 * are actually on the classpath.
 *
 * @author John Blum
 * @see org.springframework.data.gemfire.function.DefaultFunctionArgumentResolver
 * @see org.apache.geode.pdx.PdxInstance
 * @since 1.5.2
 */
@SuppressWarnings("unused")
class PdxFunctionArgumentResolver extends DefaultFunctionArgumentResolver {

    /*
     * (non-Javadoc)
     * @see org.apache.geode.cache.execute.FunctionContext
     */
    @Override
    public Object[] resolveFunctionArguments(final FunctionContext functionContext) {

        Object[] functionArguments = super.resolveFunctionArguments(functionContext);

        if (isPdxSerializerConfigured()) {

            int index = 0;

            for (Object functionArgument : functionArguments) {
                if (functionArgument instanceof PdxInstance) {

                    String className = ((PdxInstance) functionArgument).getClassName();

                    if (isDeserializationNecessary(className)) {
                        functionArguments[index] = ((PdxInstance) functionArgument).getObject();
                    }
                }

                index++;
            }
        }

        return functionArguments;
    }

    /*
     * (non-Javadoc)
     * @see java.lang.reflect.Method
     */
    @Override
    public Method getFunctionAnnotatedMethod() {
        throw new UnsupportedOperationException("Not Implemented!");
    }

    /*
     * (non-Javadoc)
     * @see org.apache.geode.cache.Cache#getPdxSerializer()
     * @see org.apache.geode.cache.CacheFactory#getAnyInstance()
     */
    boolean isPdxSerializerConfigured() {

        try {
            return (CacheFactory.getAnyInstance().getPdxSerializer() != null);
        } catch (CacheClosedException ignore) {
            return false;
        }
    }

    /*
     * (non-Javadac)
     * @see #isOnClasspath(String)
     * @see #functionAnnotatedMethodHasParameterOfType(String)
     */
    boolean isDeserializationNecessary(final String className) {
        return (isOnClasspath(className) && functionAnnotatedMethodHasParameterOfType(className));
    }

    /*
     * (non-Javadoc)
     * @see java.lang.Thread#currentThread()
     * @see java.lang.Thread#getContextClassLoader()
     * @see org.springframework.util.ClassUtils#isPresent(String, ClassLoader)
     */
    boolean isOnClasspath(final String className) {
        return ClassUtils.isPresent(className, Thread.currentThread().getContextClassLoader());
    }

    /*
     * (non-Javadoc)
     * @see #getFunctionAnnotatedMethod()
     * @see java.lang.reflect.Method#getParameterTypes()
     */
    boolean functionAnnotatedMethodHasParameterOfType(final String className) {

        for (Class<?> parameterType : getFunctionAnnotatedMethod().getParameterTypes()) {
            if (parameterType.getName().equals(className)) {
                return true;
            }
        }

        return false;
    }
}