org.apache.olingo.ext.proxy.commons.ComplexCollectionInvocationHandler.java Source code

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Here is the source code for org.apache.olingo.ext.proxy.commons.ComplexCollectionInvocationHandler.java

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/*
 * 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.olingo.ext.proxy.commons;

import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.tuple.ImmutableTriple;
import org.apache.commons.lang3.tuple.Triple;
import org.apache.olingo.client.api.communication.request.retrieve.ODataPropertyRequest;
import org.apache.olingo.client.api.communication.response.ODataRetrieveResponse;
import org.apache.olingo.client.api.uri.URIBuilder;
import org.apache.olingo.client.api.domain.ClientAnnotation;
import org.apache.olingo.client.api.domain.ClientCollectionValue;
import org.apache.olingo.client.api.domain.ClientProperty;
import org.apache.olingo.client.api.domain.ClientValue;
import org.apache.olingo.ext.proxy.AbstractService;
import org.apache.olingo.ext.proxy.api.ComplexCollection;
import org.apache.olingo.ext.proxy.api.ComplexType;

public class ComplexCollectionInvocationHandler<T extends ComplexType<?>>
        extends AbstractCollectionInvocationHandler<T, ComplexCollection<T, ?, ?>> {

    public ComplexCollectionInvocationHandler(final AbstractService<?> service, final Class<T> itemRef) {
        this(service, new ArrayList<T>(), itemRef, null);
    }

    public ComplexCollectionInvocationHandler(final Class<T> itemRef, final AbstractService<?> service,
            final URIBuilder uri) {

        this(service, new ArrayList<T>(), itemRef, uri);
    }

    public ComplexCollectionInvocationHandler(final AbstractService<?> service, final Collection<T> items,
            final Class<T> itemRef, final URIBuilder uri) {

        super(service, items, itemRef, uri);
    }

    @Override
    public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable {
        if ("filter".equals(method.getName()) || "orderBy".equals(method.getName())
                || "top".equals(method.getName()) || "skip".equals(method.getName())
                || "expand".equals(method.getName()) || "select".equals(method.getName())
                || "nextPage".equals(method.getName()) || "execute".equals(method.getName())) {

            invokeSelfMethod(method, args);
            return proxy;
        } else if (isSelfMethod(method)) {
            return invokeSelfMethod(method, args);
        } else if ("operations".equals(method.getName()) && ArrayUtils.isEmpty(args)) {
            final Class<?> returnType = method.getReturnType();

            return Proxy.newProxyInstance(Thread.currentThread().getContextClassLoader(),
                    new Class<?>[] { returnType }, OperationInvocationHandler.getInstance(this));
        } else {
            throw new NoSuchMethodException(method.getName());
        }
    }

    @SuppressWarnings("unchecked")
    @Override
    public Triple<List<T>, URI, List<ClientAnnotation>> fetchPartial(final URI uri, final Class<T> typeRef) {
        final ODataPropertyRequest<ClientProperty> req = getClient().getRetrieveRequestFactory()
                .getPropertyRequest(uri);
        req.setPrefer(getClient().newPreferences().includeAnnotations("*"));

        final ODataRetrieveResponse<ClientProperty> res = req.execute();

        final List<T> resItems = new ArrayList<T>();

        final ClientProperty property = res.getBody();
        if (property != null && property.hasCollectionValue()) {
            for (ClientValue item : (ClientCollectionValue<ClientValue>) property.getValue()) {
                Class<?> actualRef = null;
                if (StringUtils.isNotBlank(item.getTypeName())) {
                    actualRef = service.getComplexTypeClass(item.getTypeName());
                }
                if (actualRef == null) {
                    actualRef = typeRef;
                }

                resItems.add((T) getComplex(property.getName(), item, actualRef, null, null, true));
            }
        }

        return new ImmutableTriple<List<T>, URI, List<ClientAnnotation>>(resItems, null,
                Collections.<ClientAnnotation>emptyList());
    }
}