diff options
Diffstat (limited to 'base/src/main/java/bjc/utils/parserutils/ShuntingYard.java')
| -rw-r--r-- | base/src/main/java/bjc/utils/parserutils/ShuntingYard.java | 43 |
1 files changed, 17 insertions, 26 deletions
diff --git a/base/src/main/java/bjc/utils/parserutils/ShuntingYard.java b/base/src/main/java/bjc/utils/parserutils/ShuntingYard.java index 2418517..f0475ff 100644 --- a/base/src/main/java/bjc/utils/parserutils/ShuntingYard.java +++ b/base/src/main/java/bjc/utils/parserutils/ShuntingYard.java @@ -6,8 +6,8 @@ import java.util.function.Function; import bjc.funcdata.FunctionalList; import bjc.funcdata.FunctionalMap; -import bjc.funcdata.IList; -import bjc.funcdata.IMap; +import bjc.funcdata.ListEx; +import bjc.funcdata.MapEx; import bjc.utils.funcutils.StringUtils; /** @@ -25,7 +25,7 @@ public class ShuntingYard<TokenType> { * @author ben * */ - public static enum Operator implements IPrecedent { + public static enum Operator implements Precedent { /** * Represents addition. */ @@ -59,7 +59,7 @@ public class ShuntingYard<TokenType> { /* * Holds all the shuntable operations. */ - private IMap<String, IPrecedent> operators; + private MapEx<String, Precedent> operators; /** * Create a new shunting yard with a default set of operators. @@ -95,7 +95,7 @@ public class ShuntingYard<TokenType> { /* * Create the precedence marker */ - final IPrecedent prec = IPrecedent.newSimplePrecedent(precedence); + final Precedent prec = Precedent.newSimplePrecedent(precedence); this.addOp(operator, prec); } @@ -109,14 +109,12 @@ public class ShuntingYard<TokenType> { * @param precedence * The precedence of the operator. */ - public void addOp(final String operator, final IPrecedent precedence) { + public void addOp(final String operator, final Precedent precedence) { /* * Complain about trying to add an incorrect operator */ - if (operator == null) - throw new NullPointerException("Operator must not be null"); - else if (precedence == null) - throw new NullPointerException("Precedence must not be null"); + if (operator == null) throw new NullPointerException("Operator must not be null"); + else if (precedence == null) throw new NullPointerException("Precedence must not be null"); /* * Add the operator to the ones we handle @@ -140,8 +138,8 @@ public class ShuntingYard<TokenType> { /* * Get the precedence of operators */ - final int rightPrecedence = operators.get(right).getPrecedence(); - final int leftPrecedence = operators.get(left).getPrecedence(); + final int rightPrecedence = operators.get(right).get().getPrecedence(); + final int leftPrecedence = operators.get(left).get().getPrecedence(); /* * Evaluate what we were asked @@ -160,20 +158,18 @@ public class ShuntingYard<TokenType> { * * @return A list of tokens in postfix notation. */ - public IList<TokenType> postfix(final IList<String> input, + public ListEx<TokenType> postfix(final ListEx<String> input, final Function<String, TokenType> transformer) { /* * Check our input */ - if (input == null) - throw new NullPointerException("Input must not be null"); - else if (transformer == null) - throw new NullPointerException("Transformer must not be null"); + if (input == null) throw new NullPointerException("Input must not be null"); + else if (transformer == null) throw new NullPointerException("Transformer must not be null"); /* * Here's what we're handing back */ - final IList<TokenType> output = new FunctionalList<>(); + final ListEx<TokenType> output = new FunctionalList<>(); /* * The stack to put operators on @@ -226,9 +222,7 @@ public class ShuntingYard<TokenType> { } } - for (String token : stack) { - output.add(transformer.apply(token)); - } + for (String token : stack) output.add(transformer.apply(token)); return output; } @@ -244,10 +238,7 @@ public class ShuntingYard<TokenType> { /* * Check if we want to remove all operators */ - if (operator == null) { - operators = new FunctionalMap<>(); - } else { - operators.remove(operator); - } + if (operator == null) operators = new FunctionalMap<>(); + else operators.remove(operator); } } |
