ghidra/Ghidra/Framework/DB/src/main/java/db/PrimitiveField.java

/* ###
 * IP: GHIDRA
 *
 * 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 db;

/**
 * <code>PrimitiveField</code> provides a base implementation for
 * all primitive value {@link Field}s.  
 * <br>
 * When a {@link PrimitiveField} associated with a {@link SparseRecord} 
 * has a null state it will have a zero (0) value. 
 */
abstract class PrimitiveField extends Field {

	private boolean isNull = false;

	/**
	 * Abstract PrimitiveField Constructor for a mutable instance
	 */
	PrimitiveField() {
		super();
	}

	/**
	 * Abstract PrimitiveField Constructor
	 * @param immutable true if field value is immutable
	 */
	PrimitiveField(boolean immutable) {
		super(immutable);
	}

	@Override
	final boolean isNull() {
		return isNull;
	}

	@Override
	void setNull() {
		checkImmutable();
		this.isNull = true;
	}

	/**
	 * Invoked prior to setting the field's primitive value this
	 * method will perform an immutable check and set to a non-null 
	 * state.
	 */
	final void updatingPrimitiveValue() {
		checkImmutable();
		this.isNull = false;
	}

	@Override
	public String toString() {
		String nullState = "";
		if (isNull()) {
			nullState = "(NULL)";
		}
		return getClass().getSimpleName() + nullState + ": " + getValueAsString();
	}

}