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/*
	Milyn - Copyright (C) 2006 - 2010

	This library is free software; you can redistribute it and/or
	modify it under the terms of the GNU Lesser General Public
	License (version 2.1) as published by the Free Software
	Foundation.

	This library is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

	See the GNU Lesser General Public License for more details:
	http://www.gnu.org/licenses/lgpl.txt
*/
package org.milyn.json;

import org.milyn.ReaderConfigurator;
import org.milyn.cdr.SmooksResourceConfiguration;
import org.milyn.GenericReaderConfigurator;
import org.milyn.cdr.Parameter;
import org.milyn.assertion.AssertArgument;

import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * JSON Reader configurator.
 * 
 * Supports programmatic {@link JSONReader} configuration on a {@link org.milyn.Smooks#setReaderConfig(org.milyn.ReaderConfigurator) Smooks} instance.
 *
 * @author [email protected]
 */
public class JSONReaderConfigurator implements ReaderConfigurator {

    private String rootName = JSONReader.XML_ROOT;
    private String arrayElementName = JSONReader.XML_ARRAY_ELEMENT_NAME;
    private String keyWhitspaceReplacement;
    private String keyPrefixOnNumeric;
    private String illegalElementNameCharReplacement;
    private String nullValueReplacement = JSONReader.DEFAULT_NULL_VALUE_REPLACEMENT;
    private Charset encoding = Charset.forName("UTF-8");
    private Map keyMap;
    private String targetProfile;

    public JSONReaderConfigurator setRootName(String rootName) {
        AssertArgument.isNotNull(rootName, "rootName");
        this.rootName = rootName;
        return this;
    }

    public JSONReaderConfigurator setArrayElementName(String arrayElementName) {
        AssertArgument.isNotNull(arrayElementName, "arrayElementName");
        this.arrayElementName = arrayElementName;
        return this;
    }

    public JSONReaderConfigurator setKeyWhitspaceReplacement(String keyWhitspaceReplacement) {
        AssertArgument.isNotNull(keyWhitspaceReplacement, "keyWhitspaceReplacement");
        this.keyWhitspaceReplacement = keyWhitspaceReplacement;
        return this;
    }

    public JSONReaderConfigurator setKeyPrefixOnNumeric(String keyPrefixOnNumeric) {
        AssertArgument.isNotNull(keyPrefixOnNumeric, "keyPrefixOnNumeric");
        this.keyPrefixOnNumeric = keyPrefixOnNumeric;
        return this;
    }

    public JSONReaderConfigurator setIllegalElementNameCharReplacement(String illegalElementNameCharReplacement) {
        AssertArgument.isNotNull(illegalElementNameCharReplacement, "illegalElementNameCharReplacement");
        this.illegalElementNameCharReplacement = illegalElementNameCharReplacement;
        return this;
    }

    public JSONReaderConfigurator setNullValueReplacement(String nullValueReplacement) {
        AssertArgument.isNotNull(nullValueReplacement, "nullValueReplacement");
        this.nullValueReplacement = nullValueReplacement;
        return this;
    }

    public JSONReaderConfigurator setEncoding(Charset encoding) {
        AssertArgument.isNotNull(encoding, "encoding");
        this.encoding = encoding;
        return this;
    }

    public JSONReaderConfigurator setKeyMap(Map keyMap) {
        AssertArgument.isNotNull(keyMap, "keyMap");
        this.keyMap = keyMap;
        return this;
    }

    public JSONReaderConfigurator setTargetProfile(String targetProfile) {
        AssertArgument.isNotNullAndNotEmpty(targetProfile, "targetProfile");
        this.targetProfile = targetProfile;
        return this;
    }

    public List toConfig() {
        GenericReaderConfigurator configurator = new GenericReaderConfigurator(JSONReader.class);

        configurator.getParameters().setProperty("rootName", rootName);
        configurator.getParameters().setProperty("arrayElementName", arrayElementName);
        if(keyWhitspaceReplacement != null) {
            configurator.getParameters().setProperty("keyWhitspaceReplacement", keyWhitspaceReplacement);
        }
        if(keyPrefixOnNumeric != null) {
            configurator.getParameters().setProperty("keyPrefixOnNumeric", keyPrefixOnNumeric);
        }
        if(illegalElementNameCharReplacement != null) {
            configurator.getParameters().setProperty("illegalElementNameCharReplacement", illegalElementNameCharReplacement);
        }
        configurator.getParameters().setProperty("nullValueReplacement", nullValueReplacement);
        configurator.getParameters().setProperty("encoding", encoding.name());

        List configList = configurator.toConfig();
        SmooksResourceConfiguration config = configList.get(0);

        if(keyMap != null) {
            Parameter keyMapParam = new Parameter(JSONReader.CONFIG_PARAM_KEY_MAP, keyMap);
            config.setParameter(keyMapParam);
        }

        config.setTargetProfile(targetProfile);

        return configList;
    }
}