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package org.apache.james.jmap.draft.methods;

import java.io.IOException;

import javax.inject.Inject;

import org.apache.james.jmap.draft.json.ObjectMapperFactory;
import org.apache.james.jmap.draft.model.InvocationRequest;

import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.base.Preconditions;

public class JmapRequestParserImpl implements JmapRequestParser {

    private final ObjectMapper objectMapper;

    @Inject
    public JmapRequestParserImpl(ObjectMapperFactory objectMapperFactory) {
        this.objectMapper = objectMapperFactory.forParsing();
    }

    @Override
    public <T extends JmapRequest> T extractJmapRequest(InvocationRequest request, Class<T> requestClass)
            throws IOException, JsonParseException, JsonMappingException {
        Preconditions.checkNotNull(requestClass, "requestClass should not be null");

        return objectMapper.treeToValue(request.getParameters(), requestClass);
    }
}
