// This is used to optimize the special case of randomSubset where
// size == 2
@Override
Agent[] randomTwo(int precomputedCount, int random1, int random2) {
Agent[] result = new Agent[2];
// we know precomputedCount, or this method would not have been called.
// see randomSubset().
if (random2 >= random1) {
// if random2 >= random1, we need to increment random2 to choose a
// later agent.
random2++;
} else {
// if random2 < random1, we swap them so our indices are in order.
int tmp = random1;
random1 = random2;
random2 = tmp;
}
if ((size == capacity) && !((type == Turtle.class || type == Link.class) && !removableAgents)) {
result[0] = agents[random1];
result[1] = agents[random2];
} else {
AgentSet.Iterator iter = iterator();
int i = 0;
while (i++ < random1) {
iter.next(); // skip to the first place
}
result[0] = iter.next();
while (i++ < random2) {
iter.next(); // skip to the next place
}
result[1] = iter.next();
}
return result;
}
@Override
public boolean contains(Agent agent) {
for (AgentSet.Iterator iter = iterator(); iter.hasNext(); ) {
if (iter.next() == agent) {
return true;
}
}
return false;
}
@Override
public LogoList toLogoList() {
ArrayList<Agent> result = new ArrayList<Agent>();
for (AgentSet.Iterator iter = iterator(); iter.hasNext(); ) {
Agent agent = iter.next();
result.add(agent);
}
Collections.sort(result);
return LogoList.fromJava(result);
}
// This assumes we've already checked that the counts
// are equal. - ST 7/6/06
@Override
boolean equalAgentSetsHelper(org.nlogo.api.AgentSet otherSet) {
HashSet<Agent> set = new HashSet<Agent>();
for (AgentSet.Iterator iter = iterator(); iter.hasNext(); ) {
set.add(iter.next());
}
for (org.nlogo.api.Agent a : otherSet.agents()) {
if (!set.contains(a)) {
return false;
}
}
return true;
}
@Override
public String toString() {
StringBuilder s = new StringBuilder("AgentSet");
s = s.append("\n...... type: ");
s = s.append(type == null ? "null" : type.toString());
s = s.append("\n...... size: " + size);
s = s.append("\n...... count(): " + count());
s = s.append("\n...... capacity: " + capacity);
s = s.append("\n...... agents: ");
for (AgentSet.Iterator iter = iterator(); iter.hasNext(); ) {
s = s.append("\n" + iter.next().toString());
}
return s.toString();
}
@Override
public Agent randomOne(int precomputedCount, int random) {
// note: we can assume agentset is nonempty , since _randomoneof.java checks for that
if ((size == capacity) && !((type == Turtle.class || type == Link.class) && !removableAgents)) {
return agents[random];
} else {
AgentSet.Iterator iter = iterator();
for (int i = 0; i < random; i++) {
iter.next(); // skip to the right place
}
return iter.next();
}
}
@Override
public int count() {
if ((type == Turtle.class || type == Link.class) && !removableAgents) {
// some of the turtles might be dead, so we need
// to actually count them - ST 2/27/03
int result = 0;
for (AgentSet.Iterator iter = iterator(); iter.hasNext(); ) {
iter.next();
result++;
}
return result;
} else {
return size;
}
}
public int calcHashCode() {
// IEEE 754 math involves two different zeros, positive zero and negative
// zero. They are supposed to be indistinguishable from NetLogo code.
// but Sun, in their infinite wisdom, made them have different hash codes
// when stored in java.lang.Double objects. - ST 12/5/09
if (sourceObject instanceof Double) {
return ((Double) sourceObject).doubleValue() == 0.0 // true for both pos and neg zero
? ZERO_CODE
: sourceObject.hashCode();
}
// these next two cases are sneaky -- NetLogo considers dead turtles to be
// equal to each other, and to nobody. Dead turtles have an id of minus one,
// so that's what makes the next two cases work. - ST 10/28/03*/
else if (sourceObject instanceof Turtle) {
return Long.valueOf(((Turtle) sourceObject).id).hashCode();
} else if (sourceObject == Nobody$.MODULE$) {
return NOBODY_CODE;
} else if (sourceObject instanceof LogoList) {
// Hash algor for List (from which ArrayList and therefore LogoList extend)
// http://java.sun.com/j2se/1.4.1/docs/apiList.html#hashCode()
// Instead of recursing on the original element types,
// we use a LogoHashObject - JMD 10/28/03*/
int hashCodeCalc = 1;
Iterator<Object> listItr = ((LogoList) sourceObject).iterator();
while (listItr.hasNext()) {
LogoHashObject lhObj = new LogoHashObject(listItr.next());
hashCodeCalc = 31 * hashCodeCalc + (lhObj.getSourceObject() == null ? 0 : lhObj.hashCode());
}
return hashCodeCalc;
} else if (sourceObject instanceof AgentSet) {
int code = 1;
for (AgentSet.Iterator i = ((AgentSet) sourceObject).iterator(); i.hasNext(); ) {
Agent agent = i.next();
LogoHashObject obj = new LogoHashObject(agent);
code = 31 * code + (agent != null ? 0 : obj.hashCode());
}
return code;
} else {
return sourceObject.hashCode();
}
}
@Override
Agent[] randomSubsetGeneral(
int resultSize, int precomputedCount, org.nlogo.util.MersenneTwisterFast random) {
Agent result[] = new Agent[resultSize];
if (precomputedCount == capacity) {
for (int i = 0, j = 0; j < resultSize; i++) {
if (random.nextInt(precomputedCount - i) < resultSize - j) {
result[j] = agents[i];
j++;
}
}
} else {
AgentSet.Iterator iter = iterator();
for (int i = 0, j = 0; j < resultSize; i++) {
Agent next = iter.next();
if (random.nextInt(precomputedCount - i) < resultSize - j) {
result[j] = next;
j++;
}
}
}
return result;
}
