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package bjc.dicelang.ast.nodes;
import org.apache.commons.lang3.StringUtils;
import bjc.dicelang.ComplexDice;
import bjc.dicelang.CompoundDice;
import bjc.dicelang.IDiceExpression;
import bjc.dicelang.ScalarDie;
import bjc.utils.data.Pair;
import bjc.utils.parserutils.AST;
/**
* A AST node that represents a literal value
*
* @author ben
*
*/
public class LiteralDiceNode implements IDiceASTNode {
private static boolean isValidInfixOperator(String dat, String op) {
return StringUtils.countMatches(dat, op) == 1
&& !dat.equalsIgnoreCase(op) && !dat.startsWith(op);
}
/**
* The value contained by this node
*/
private String value;
/**
* Create a new node with the given value
*
* @param data
* The value to be in this node
*/
public LiteralDiceNode(String data) {
this.value = data;
}
/**
* Create a new node with the given value
*
* @param val
* The value for this node
*/
public LiteralDiceNode(int val) {
this(Integer.toString(val));
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
} else if (obj == null) {
return false;
} else if (getClass() != obj.getClass()) {
return false;
} else {
LiteralDiceNode other = (LiteralDiceNode) obj;
if (value == null) {
if (other.value != null) {
return false;
}
} else if (!value.equals(other.value)) {
return false;
}
return true;
}
}
/**
* Get the data stored in this AST node
*
* @return the data stored in this AST node
*/
public String getData() {
return value;
}
@Override
public DiceASTType getType() {
return DiceASTType.LITERAL;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((value == null) ? 0 : value.hashCode());
return result;
}
@Override
public boolean isOperator() {
return false;
}
/**
* Parse this node into an expression
*
* @return The node in expression form
*/
public IDiceExpression toExpression() {
String literalData = this.getData();
if (LiteralDiceNode.isValidInfixOperator(literalData, "c")) {
String[] strangs = literalData.split("c");
return new CompoundDice(strangs);
} else if (LiteralDiceNode.isValidInfixOperator(literalData,
"d")) {
/*
* Handle dice groups
*/
return ComplexDice.fromString(literalData);
} else {
try {
return new ScalarDie(Integer.parseInt(literalData));
} catch (NumberFormatException nfex) {
UnsupportedOperationException usex = new UnsupportedOperationException(
"Found malformed leaf token " + this);
usex.initCause(nfex);
throw usex;
}
}
}
/**
* Parse this node into an expression
*
* @return The node as a pair of a sample value and the AST it
* represents
*/
public Pair<Integer, AST<IDiceASTNode>> toParseValue() {
AST<IDiceASTNode> returnedAST = new AST<>(this);
IDiceExpression expression = toExpression();
return new Pair<>(expression.roll(), returnedAST);
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return value;
}
/**
* Check if this node represents a constant value
*
* @return Whether or not this node represents a constant value
*/
public boolean isConstant() {
try {
Integer.parseInt(value);
return true;
} catch (@SuppressWarnings("unused") NumberFormatException nfex) {
// We don't care about details
return false;
}
}
/**
* Return the constant value this node represents
*
* @return The constant value of this node
*
* @throws NumberFormatException
* if you call this on a node that doesn't represent a
* constant value
*/
public int toConstant() {
return Integer.parseInt(value);
}
}
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