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/* Copyright 2016 Clifton Labs
 * 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.sleepycat.json_simple;

/** Represents structural entities in JSON.
 * @since 2.0.0 */
class Yytoken{
	/** Represents the different kinds of tokens. */
	enum Types{
		/** Tokens of this type will always have a value of ":" */
		COLON,
		/** Tokens of this type will always have a value of "," */
		COMMA,
		/** Tokens of this type will always have a value that is a boolean, null, number, or string. */
		DATUM,
		/** Tokens of this type will always have a value of "" */
		END,
		/** Tokens of this type will always have a value of "{" */
		LEFT_BRACE,
		/** Tokens of this type will always have a value of "[" */
		LEFT_SQUARE,
		/** Tokens of this type will always have a value of "}" */
		RIGHT_BRACE,
		/** Tokens of this type will always have a value of "]" */
		RIGHT_SQUARE;
	}

	@SuppressWarnings("javadoc")
	private final Types		type;
	@SuppressWarnings("javadoc")
	private final Object	value;

	/** @param type represents the kind of token the instantiated token will be.
	 * @param value represents the value the token is associated with, will be ignored unless type is equal to
	 *        Types.DATUM.
	 * @see Types */
	Yytoken(final Types type, final Object value){
		/* Sanity check. Make sure the value is ignored for the proper value unless it is a datum token. */
		switch(type){
			case COLON:
				this.value = ":";
				break;
			case COMMA:
				this.value = ",";
				break;
			case END:
				this.value = "";
				break;
			case LEFT_BRACE:
				this.value = "{";
				break;
			case LEFT_SQUARE:
				this.value = "[";
				break;
			case RIGHT_BRACE:
				this.value = "}";
				break;
			case RIGHT_SQUARE:
				this.value = "]";
				break;
			default:
				this.value = value;
				break;
		}
		this.type = type;
	}

	/** @return which of the {@link Yytoken.Types} the token is.
	 * @see Yytoken.Types */
	Types getType(){
		return this.type;
	}

	/** @return what the token is.
	 * @see Types */
	Object getValue(){
		return this.value;
	}

	@Override
	public String toString(){
		final StringBuffer sb = new StringBuffer();
		sb.append(this.type.toString()).append("(").append(this.value).append(")");
		return sb.toString();
	}
}