//----------------------------------------------------------------------
// ArrayStringLog.java        by Dale/Joyce/Weems              Chapter 2
//
// Implements StringLogInterface using an array to hold the strings.
//
// ajg version: formatting changes; protected->private; if-then-else; ++
//              while-->for; methods reordered
//----------------------------------------------------------------------

package ch02.stringLogs;

public class ArrayStringLog implements StringLogInterface {
    private String name;              // name of this StringLog
    private String[] log;             // array that holds strings
    private int lastIndex = -1;       // index of last string in array

    public ArrayStringLog(String name, int maxSize) {
	// Precondition:   maxSize > 0
	this.name = name;
	log = new String[maxSize];
    }

    static final int DEFAULT_MAX_SIZE = 100;
    public ArrayStringLog(String name) {
	this(name, DEFAULT_MAX_SIZE);
    }

    public void insert(String s) {
	// Precondition:   This StringLog is not full.
	log[++lastIndex] = s;
    }
 
    public void clear() {                  
	for (int i=0; i<=lastIndex; i++)
	    log[i] = null;
	lastIndex = -1;
    }

    public boolean isFull() { return lastIndex == (log.length - 1); }
  
    public int size() {
	return (lastIndex + 1);
    }
  
    public String getName() { return name; }

    public boolean contains(String element) {
	for (int location=0; location<=lastIndex; location++) 
	    if (element.equalsIgnoreCase(log[location]))
		return true;
	return false;
    }

    public String toString() {
	// Returns a nicely formatted string representing this StringLog.
	String ans = "Log: " + name + "\n\n";
    
	for (int i=0; i<=lastIndex; i++)
	    ans += (i+1) + ". " + log[i] + "\n";
      
	return ans;
    }
}
// Local Variables:
// compile-command: "cd ../..; javac ch02/stringLogs/ArrayStringLog.java"
// End: