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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.fixedlength;

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

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

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

    private String fields;
    private boolean lineNumber = false;
    private int skipLines = 0;
    private Charset encoding = Charset.forName("UTF-8");
    private String rootElementName = "set";
    private String recordElementName = "record";
   private String lineNumberAttributeName = "number";
    private String truncatedAttributeName = "truncated";
    private FixedLengthBinding binding;
    private String targetProfile;
    private boolean indent = false;
    private boolean strict = true;

    public FixedLengthReaderConfigurator(String fields) {
        AssertArgument.isNotNullAndNotEmpty(fields, "fields");
        this.fields = fields;
    }

    public FixedLengthReaderConfigurator setSkipLines(int skipLines) {
        this.skipLines = skipLines;
        return this;
    }

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

    public FixedLengthReaderConfigurator setRootElementName(String rootElementName) {
        AssertArgument.isNotNullAndNotEmpty(rootElementName, "rootElementName");
        this.rootElementName = rootElementName;
        return this;
    }

    public FixedLengthReaderConfigurator setRecordElementName(String recordElementName) {
        AssertArgument.isNotNullAndNotEmpty(recordElementName, "recordElementName");
        this.recordElementName = recordElementName;
        return this;
    }

    public FixedLengthReaderConfigurator setLineNumberAttributeName(String lineNumberAttributeName) {
        AssertArgument.isNotNullAndNotEmpty(lineNumberAttributeName, "lineNumberAttributeName");
        this.lineNumberAttributeName = lineNumberAttributeName;
        return this;
    }

    public FixedLengthReaderConfigurator setTruncatedAttributeName(String truncatedAttributeName) {
        AssertArgument.isNotNullAndNotEmpty(truncatedAttributeName, "truncatedAttributeName");
        this.truncatedAttributeName = truncatedAttributeName;
        return this;
    }

    public FixedLengthReaderConfigurator setIndent(boolean indent) {
        this.indent = indent;
        return this;
    }

    public FixedLengthReaderConfigurator setStrict(boolean strict) {
        this.strict = strict;
        return this;
    }

    public FixedLengthReaderConfigurator setBinding(FixedLengthBinding binding) {
        this.binding = binding;
        return this;
    }

    public FixedLengthReaderConfigurator setLineNumber(boolean lineNumber) {
        this.lineNumber = lineNumber;
        return this;
    }

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

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

        configurator.getParameters().setProperty("fields", fields);
        configurator.getParameters().setProperty("lineNumber", Boolean.toString(lineNumber));
        configurator.getParameters().setProperty("skipLines", Integer.toString(skipLines));
        configurator.getParameters().setProperty("encoding", encoding.name());
        configurator.getParameters().setProperty("rootElementName", rootElementName);
        configurator.getParameters().setProperty("recordElementName", recordElementName);
        configurator.getParameters().setProperty("lineNumberAttributeName", lineNumberAttributeName);
        configurator.getParameters().setProperty("truncatedAttributeName", truncatedAttributeName);
        configurator.getParameters().setProperty("indent", Boolean.toString(indent));
        configurator.getParameters().setProperty("strict", Boolean.toString(strict));

        if(binding != null) {
            configurator.getParameters().setProperty("bindBeanId", binding.getBeanId());
            configurator.getParameters().setProperty("bindBeanClass", binding.getBeanClass().getName());
            configurator.getParameters().setProperty("bindingType", binding.getBindingType().toString());
            if(binding.getBindingType() == FixedLengthBindingType.MAP) {
                if(binding.getKeyField() == null) {
                    throw new SmooksConfigurationException("Fixed length 'MAP' Binding must specify a 'keyField' property on the binding configuration.");
                }
                configurator.getParameters().setProperty("bindMapKeyField", binding.getKeyField());
            }
        }

        configurator.setTargetProfile(targetProfile);

        return configurator.toConfig();
    }
}