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/*
 * $Id: a1d6a387ca4f8b8233a6294f92883d4d71ba1d8b $
 *
 * This file is part of the iText (R) project.
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 * Authors: Bruno Lowagie, Paulo Soares, et al.
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package com.itextpdf.text.pdf;

/**
 * A signature field lock dictionary.
 */
public class PdfSigLockDictionary extends PdfDictionary  {
	
	/**
	 * Enumerates the different actions of a signature lock.
	 * Indicates the set of fields that should be locked:
	 * all the fields in the document,
	 * all the fields specified in the /Fields array
	 * all the fields except those specified in the /Fields array
	 */
	public enum LockAction {
		ALL(PdfName.ALL), INCLUDE(PdfName.INCLUDE), EXCLUDE(PdfName.EXCLUDE);
		
		private PdfName name;
		
		private LockAction(PdfName name) {
			this.name = name;
		}
		
		public PdfName getValue() {
			return name;
		}
	}

	/**
	 * Enumerates the different levels of permissions.
	 */
	public enum LockPermissions {
		NO_CHANGES_ALLOWED(1), FORM_FILLING(2), FORM_FILLING_AND_ANNOTATION(3);
		
		private PdfNumber number;
		
		private LockPermissions(int p) {
			number = new PdfNumber(p);
		}
		
		public PdfNumber getValue() {
			return number;
		}
	}
	
	/**
	 * Creates a signature lock valid for all fields in the document.
	 */
	public PdfSigLockDictionary() {
		super(PdfName.SIGFIELDLOCK);
		this.put(PdfName.ACTION, LockAction.ALL.getValue());
	}
	
	/**
	 * Creates a signature lock for all fields in the document,
	 * setting specific permissions.
	 */
	public PdfSigLockDictionary(LockPermissions p) {
		this();
		this.put(PdfName.P, p.getValue());
	}
	
	/**
	 * Creates a signature lock for specific fields in the document.
	 */
	public PdfSigLockDictionary(LockAction action, String... fields) {
		this(action, null, fields);
	}
	
	/**
	 * Creates a signature lock for specific fields in the document.
	 */
	public PdfSigLockDictionary(LockAction action, LockPermissions p, String... fields) {
		super(PdfName.SIGFIELDLOCK);
		this.put(PdfName.ACTION, action.getValue());
		if (p != null)
			this.put(PdfName.P, p.getValue());
		PdfArray fieldsArray = new PdfArray();
		for (String field : fields) {
			fieldsArray.add(new PdfString(field));
		}
		this.put(PdfName.FIELDS, fieldsArray);
	}
}