com.mycila.hc.serial.Deserializers.groovy Maven / Gradle / Ivy

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/**
 * Copyright (C) 2013 Mycila ([email protected])
 *
 * 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.mycila.hc.serial

import com.mycila.hc.HttpClientConfig
import com.mycila.hc.HttpResult
import com.mycila.hc.io.ContentProviderInputStream

import java.nio.ByteBuffer

/**
 * @author Mathieu Carbou ([email protected])
 * @date 2014-02-13
 */
class Deserializers {

    protected final Deque deserializers = new ArrayDeque<>()
    protected final HttpClientConfig config

    Deserializers(HttpClientConfig config) {
        this.config = config
        addDeserializer new ClosureDeserializer(
            type: String,
            delegate: { HttpResult r -> new String(new ContentProviderInputStream(r.contentProvider).bytes, r.response.headers.contentCharset) }
        )
        addDeserializer new ClosureDeserializer(
            type: byte[],
            delegate: { HttpResult r -> new ContentProviderInputStream(r.contentProvider).bytes }
        )
        addDeserializer new ClosureDeserializer(
            type: ByteBuffer,
            delegate: { HttpResult r -> ByteBuffer.wrap(new ContentProviderInputStream(r.contentProvider).bytes) }
        )
        addDeserializer new ClosureDeserializer(
            type: InputStream,
            delegate: { HttpResult r -> new ContentProviderInputStream(r.contentProvider) }
        )
        addDeserializer new ClosureDeserializer(
            type: Reader,
            delegate: { HttpResult r -> new InputStreamReader(new ContentProviderInputStream(r.contentProvider), r.response.headers.contentCharset) }
        )
    }

    Deserializers addDeserializer(Deserializer serializer) {
        if (serializer instanceof DeserializerSkeleton) {
            serializer.config = config
        }
        deserializers.addFirst(serializer)
        return this
    }

    Deserializers addDeserializers(Deserializer... deserializers) {
        for (int i = deserializers.length - 1; i >= 0; i--) {
            addDeserializer(deserializers[i])
        }
        return this
    }

    public  Deserializer getDeserializer(Class targetType, String contentType) {
        deserializers.find { it.supports(targetType, contentType) } ?: FAILING
    }

    protected static final Deserializer FAILING = new Deserializer