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

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Here is the source code for org.apache.olingo.ext.proxy.commons.PrimitiveCollectionInvocationHandler.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.io.Serializable;
import java.lang.reflect.InvocationHandler;
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.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.ClientProperty;
import org.apache.olingo.client.api.domain.ClientAnnotation;
import org.apache.olingo.client.api.domain.ClientValue;
import org.apache.olingo.ext.proxy.AbstractService;
import org.apache.olingo.ext.proxy.api.PrimitiveCollection;

public class PrimitiveCollectionInvocationHandler<T extends Serializable>
        extends AbstractCollectionInvocationHandler<T, PrimitiveCollection<T>> {

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

    public PrimitiveCollectionInvocationHandler(final AbstractService<?> service, final Class<T> itemRef,
            final URIBuilder uri) {
        this(service, new ArrayList<T>(), itemRef, uri);
    }

    public PrimitiveCollectionInvocationHandler(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()) || "top".equals(method.getName()) || "skip".equals(method.getName())
                || "execute".equals(method.getName()) || "executeAsync".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());
        }
    }

    @Override
    @SuppressWarnings("unchecked")
    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.hasNullValue()) {
            for (ClientValue item : property.getCollectionValue()) {
                resItems.add((T) item.asPrimitive().toValue());
            }
        }

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

    public void delete() {
        if (baseURI != null) {
            getContext().entityContext().addFurtherDeletes(
                    getClient().newURIBuilder(baseURI.toASCIIString()).appendValueSegment().build());
        }
    }

    @Override
    public boolean equals(final Object obj) {
        if (obj instanceof Proxy) {
            final InvocationHandler handler = Proxy.getInvocationHandler(obj);
            if (handler instanceof PrimitiveCollectionInvocationHandler) {
                return items.equals(PrimitiveCollectionInvocationHandler.class.cast(handler).items);
            }
        }

        return false;
    }

    @Override
    public int hashCode() {
        return items.hashCode();
    }
}