com.evolveum.midpoint.model.impl.rest.MidpointAbstractProvider.java Source code

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Here is the source code for com.evolveum.midpoint.model.impl.rest.MidpointAbstractProvider.java

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/*
 * Copyright (c) 2010-2017 Evolveum
 *
 * 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 com.evolveum.midpoint.model.impl.rest;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.List;

import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;
import javax.xml.namespace.QName;

import org.apache.commons.lang.StringUtils;
import org.apache.cxf.jaxrs.model.ClassResourceInfo;
import org.apache.cxf.jaxrs.provider.AbstractConfigurableProvider;
import org.springframework.beans.factory.annotation.Autowired;

import com.evolveum.midpoint.prism.PrismConstants;
import com.evolveum.midpoint.prism.PrismContext;
import com.evolveum.midpoint.prism.PrismObject;
import com.evolveum.midpoint.prism.PrismParser;
import com.evolveum.midpoint.prism.PrismSerializer;
import com.evolveum.midpoint.schema.result.OperationResult;
import com.evolveum.midpoint.util.exception.SchemaException;
import com.evolveum.midpoint.util.logging.LoggingUtils;
import com.evolveum.midpoint.util.logging.Trace;
import com.evolveum.midpoint.util.logging.TraceManager;
import com.evolveum.midpoint.xml.ns._public.common.common_3.ObjectType;
import com.evolveum.midpoint.xml.ns._public.common.common_3.OperationResultType;

public abstract class MidpointAbstractProvider<T> extends AbstractConfigurableProvider
        implements MessageBodyReader<T>, MessageBodyWriter<T> {

    private static transient Trace LOGGER = TraceManager.getTrace(MidpointAbstractProvider.class);

    @Autowired(required = true)
    protected PrismContext prismContext;

    //   @Override
    public void init(List<ClassResourceInfo> cris) {
        setEnableStreaming(true);
    }

    @Override
    public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        if (type.getPackage().getName().startsWith("com.evolveum.midpoint")
                || type.getPackage().getName().startsWith("com.evolveum.prism")) {
            return true;
        }
        return false;
    }

    @Override
    public long getSize(T t, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        // TODO Auto-generated method stub
        return -1;
    }

    @Override
    public void writeTo(T object, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType,
            MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream)
            throws IOException, WebApplicationException {

        // TODO implement in the standard serializer; also change root name
        QName fakeQName = new QName(PrismConstants.NS_PREFIX + "debug", "debugPrintObject");
        String xml;

        PrismSerializer<String> serializer = getSerializer();

        try {
            if (object instanceof PrismObject) {
                xml = serializer.serialize((PrismObject<?>) object);
            } else if (object instanceof OperationResult) {
                OperationResultType operationResultType = ((OperationResult) object).createOperationResultType();
                xml = serializer.serializeAnyData(operationResultType, fakeQName);
            } else {
                xml = serializer.serializeAnyData(object, fakeQName);
            }
            entityStream.write(xml.getBytes("utf-8"));
        } catch (SchemaException | RuntimeException e) {
            LoggingUtils.logException(LOGGER, "Couldn't marshal element to string: {}", e, object);
        }
    }

    protected abstract PrismSerializer<String> getSerializer();

    protected abstract PrismParser getParser(InputStream entityStream);

    @Override
    public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        if (type.getPackage().getName().startsWith("com.evolveum.midpoint")
                || type.getPackage().getName().startsWith("com.evolveum.prism")) {
            return true;
        }
        return false;
    }

    @Override
    public T readFrom(Class<T> type, Type genericType, Annotation[] annotations, MediaType mediaType,
            MultivaluedMap<String, String> httpHeaders, InputStream entityStream)
            throws IOException, WebApplicationException {

        if (entityStream == null) {
            return null;
        }

        PrismParser parser = getParser(entityStream);

        T object = null;
        try {
            LOGGER.info("type of respose: {}", type);
            if (PrismObject.class.isAssignableFrom(type) || type.isAssignableFrom(PrismObject.class)
                    || ObjectType.class.isAssignableFrom(type)) {
                object = (T) parser.parse();
            } else {
                object = parser.parseRealValue();
            }

            return object;
        } catch (SchemaException ex) {
            throw new WebApplicationException(ex);
        } catch (IOException ex) {
            throw new IOException(ex);
        }

    }

}