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Code Issues Releases Wiki Activity

Remove nullability from reduction.

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This commit is contained in:
Danila Fedorin 2017-09-07 12:53:12 -07:00
parent 1575d3e574
commit 52ab357fe1
17 changed files with 31 additions and 36 deletions
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2
core/src/main/java/org/nwapw/abacus/function/DomainException.java
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@ -18,7 +18,7 @@ public class DomainException extends RuntimeException {
* Creates a new DomainException with a default message.
*/
public DomainException(){
this("Domain Error");
this("Domain error.");
}
}

2
core/src/main/java/org/nwapw/abacus/function/EvaluationException.java
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@ -11,7 +11,7 @@ public class EvaluationException extends RuntimeException {
* Creates a new EvaluationException with the default string.
*/
public EvaluationException() {
super("Error evaluating expression.");
super("Evaluation error.");
}
/**

2
core/src/main/java/org/nwapw/abacus/number/ComputationInterruptedException.java
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@ -10,7 +10,7 @@ public class ComputationInterruptedException extends RuntimeException {
* Creates a new exception of this type.
*/
public ComputationInterruptedException() {
super("Computation interrupted by user.");
super("Computation interrupted.");
}
}

7
core/src/main/java/org/nwapw/abacus/plugin/StandardPlugin.java
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@ -29,8 +29,7 @@ public class StandardPlugin extends Plugin {
@Override
public NumberInterface applyInternal(MutableEvaluationContext context, TreeNode[] params) {
String assignTo = ((VariableNode) params[0]).getVariable();
NumberInterface value = params[1].reduce(context.getReducer());
if(value == null) throw new EvaluationException();
NumberInterface value = params[1].reduce(context.getInheritedReducer());
context.setVariable(assignTo, value);
return value;
}
@ -48,9 +47,7 @@ public class StandardPlugin extends Plugin {
public NumberInterface applyInternal(MutableEvaluationContext context, TreeNode[] params) {
String assignTo = ((VariableNode) params[0]).getVariable();
context.setDefinition(assignTo, params[1]);
NumberInterface value = params[1].reduce(context.getReducer());
if(value == null) throw new EvaluationException();
return value;
return params[1].reduce(context.getInheritedReducer());
}
};
/**

2
core/src/main/kotlin/org/nwapw/abacus/tree/EvaluationResult.kt
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@ -3,4 +3,4 @@ package org.nwapw.abacus.tree
import org.nwapw.abacus.context.MutableEvaluationContext
import org.nwapw.abacus.number.NumberInterface
data class EvaluationResult(val value: NumberInterface?, val resultingContext: MutableEvaluationContext)
data class EvaluationResult(val value: NumberInterface, val resultingContext: MutableEvaluationContext)

4
core/src/main/kotlin/org/nwapw/abacus/tree/FunctionNode.kt
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@ -10,8 +10,8 @@ package org.nwapw.abacus.tree
*/
class FunctionNode(function: String, children: List<TreeNode>) : CallNode(function, children) {
override fun <T : Any> reduce(reducer: Reducer<T>): T? {
val children = Array<Any>(children.size, { children[it].reduce(reducer) ?: return null; })
override fun <T : Any> reduce(reducer: Reducer<T>): T {
val children = Array<Any>(children.size, { children[it].reduce(reducer) })
return reducer.reduceNode(this, *children)
}

6
core/src/main/kotlin/org/nwapw/abacus/tree/NumberBinaryNode.kt
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@ -13,9 +13,9 @@ package org.nwapw.abacus.tree
class NumberBinaryNode(operation: String, left: TreeNode, right: TreeNode)
: BinaryNode(operation, left, right) {
override fun <T : Any> reduce(reducer: Reducer<T>): T? {
val left = left.reduce(reducer) ?: return null
val right = right.reduce(reducer) ?: return null
override fun <T : Any> reduce(reducer: Reducer<T>): T {
val left = left.reduce(reducer)
val right = right.reduce(reducer)
return reducer.reduceNode(this, left, right)
}

2
core/src/main/kotlin/org/nwapw/abacus/tree/NumberNode.kt
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@ -10,7 +10,7 @@ package org.nwapw.abacus.tree
*/
class NumberNode(val number: String) : TreeNode() {
override fun <T : Any> reduce(reducer: Reducer<T>): T? {
override fun <T : Any> reduce(reducer: Reducer<T>): T {
return reducer.reduceNode(this)
}

16
core/src/main/kotlin/org/nwapw/abacus/tree/NumberReducer.kt
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@ -2,6 +2,7 @@ package org.nwapw.abacus.tree
import org.nwapw.abacus.Abacus
import org.nwapw.abacus.context.EvaluationContext
import org.nwapw.abacus.function.EvaluationException
import org.nwapw.abacus.number.NumberInterface
class NumberReducer(val abacus: Abacus, context: EvaluationContext) : Reducer<NumberInterface> {
@ -12,18 +13,19 @@ class NumberReducer(val abacus: Abacus, context: EvaluationContext) : Reducer<Nu
this.context.reducer = this
}
override fun reduceNode(treeNode: TreeNode, vararg children: Any): NumberInterface? {
override fun reduceNode(treeNode: TreeNode, vararg children: Any): NumberInterface {
val promotionManager = abacus.promotionManager
return when(treeNode){
is NumberNode -> {
context.inheritedNumberImplementation?.instanceForString(treeNode.number)
?: throw EvaluationException()
}
is VariableNode -> {
val variable = context.getVariable(treeNode.variable)
if(variable != null) return variable
val definition = context.getDefinition(treeNode.variable)
if(definition != null) return definition.reduce(this)
null
throw EvaluationException()
}
is NumberUnaryNode -> {
val child = children[0] as NumberInterface
@ -34,29 +36,29 @@ class NumberReducer(val abacus: Abacus, context: EvaluationContext) : Reducer<Nu
is NumberBinaryNode -> {
val left = children[0] as NumberInterface
val right = children[1] as NumberInterface
val promotionResult = promotionManager.promote(left, right) ?: return null
val promotionResult = promotionManager.promote(left, right) ?: throw EvaluationException()
context.numberImplementation = promotionResult.promotedTo
abacus.pluginManager.operatorFor(treeNode.operation).apply(context, *promotionResult.items)
}
is FunctionNode -> {
val promotionResult = promotionManager
.promote(*children.map { it as NumberInterface }.toTypedArray()) ?: return null
.promote(*children.map { it as NumberInterface }.toTypedArray()) ?: throw EvaluationException()
context.numberImplementation = promotionResult.promotedTo
abacus.pluginManager.functionFor(treeNode.callTo).apply(context, *promotionResult.items)
}
is TreeValueUnaryNode -> {
abacus.pluginManager.treeValueOperatorFor(treeNode.operation)
.apply(context, treeNode.applyTo ?: return null)
.apply(context, treeNode.applyTo)
}
is TreeValueBinaryNode -> {
abacus.pluginManager.treeValueOperatorFor(treeNode.operation)
.apply(context, treeNode.left ?: return null, treeNode.right ?: return null)
.apply(context, treeNode.left, treeNode.right)
}
is TreeValueFunctionNode -> {
abacus.pluginManager.treeValueFunctionFor(treeNode.callTo)
.apply(context, *treeNode.children.toTypedArray())
}
else -> null
else -> throw EvaluationException()
}
}

2
core/src/main/kotlin/org/nwapw/abacus/tree/NumberUnaryNode.kt
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@ -11,7 +11,7 @@ package org.nwapw.abacus.tree
class NumberUnaryNode(operation: String, child: TreeNode)
: UnaryNode(operation, child) {
override fun <T : Any> reduce(reducer: Reducer<T>): T? {
override fun <T : Any> reduce(reducer: Reducer<T>): T {
val child = applyTo.reduce(reducer)
return reducer.reduceNode(this, child)
}

2
core/src/main/kotlin/org/nwapw/abacus/tree/Reducer.kt
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@ -14,6 +14,6 @@ interface Reducer<out T> {
* @param treeNode the tree node to reduce.
* @param children the list of children, of type T.
*/
fun reduceNode(treeNode: TreeNode, vararg children: Any): T?
fun reduceNode(treeNode: TreeNode, vararg children: Any): T
}

2
core/src/main/kotlin/org/nwapw/abacus/tree/TreeNode.kt
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@ -5,6 +5,6 @@ package org.nwapw.abacus.tree
*/
abstract class TreeNode {
abstract fun <T : Any> reduce(reducer: Reducer<T>): T?
abstract fun <T : Any> reduce(reducer: Reducer<T>): T
}

2
core/src/main/kotlin/org/nwapw/abacus/tree/TreeValueBinaryNode.kt
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@ -14,7 +14,7 @@ package org.nwapw.abacus.tree
class TreeValueBinaryNode(operation: String, left: TreeNode, right: TreeNode)
: BinaryNode(operation, left, right) {
override fun <T : Any> reduce(reducer: Reducer<T>): T? {
override fun <T : Any> reduce(reducer: Reducer<T>): T {
return reducer.reduceNode(this)
}

2
core/src/main/kotlin/org/nwapw/abacus/tree/TreeValueFunctionNode.kt
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@ -9,7 +9,7 @@ package org.nwapw.abacus.tree
*/
class TreeValueFunctionNode(name: String, children: List<TreeNode>) : CallNode(name, children) {
override fun <T : Any> reduce(reducer: Reducer<T>): T? {
override fun <T : Any> reduce(reducer: Reducer<T>): T {
return reducer.reduceNode(this)
}

4
core/src/main/kotlin/org/nwapw/abacus/tree/TreeValueUnaryNode.kt
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@ -12,8 +12,8 @@ package org.nwapw.abacus.tree
class TreeValueUnaryNode(operation: String, child: TreeNode)
: UnaryNode(operation, child) {
override fun <T : Any> reduce(reducer: Reducer<T>): T? {
return reducer.reduceNode(this);
override fun <T : Any> reduce(reducer: Reducer<T>): T {
return reducer.reduceNode(this)
}
}

2
core/src/main/kotlin/org/nwapw/abacus/tree/VariableNode.kt
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@ -10,7 +10,7 @@ package org.nwapw.abacus.tree
*/
class VariableNode(val variable: String) : TreeNode() {
override fun <T : Any> reduce(reducer: Reducer<T>): T? {
override fun <T : Any> reduce(reducer: Reducer<T>): T {
return reducer.reduceNode(this)
}

8
fx/src/main/java/org/nwapw/abacus/fx/AbacusController.java
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@ -15,6 +15,7 @@ import org.nwapw.abacus.config.Configuration;
import org.nwapw.abacus.function.Documentation;
import org.nwapw.abacus.function.DocumentationType;
import org.nwapw.abacus.function.DomainException;
import org.nwapw.abacus.function.EvaluationException;
import org.nwapw.abacus.number.*;
import org.nwapw.abacus.plugin.ClassFinder;
import org.nwapw.abacus.plugin.PluginListener;
@ -147,16 +148,11 @@ public class AbacusController implements PluginListener {
}
EvaluationResult result = abacus.evaluateTree(constructedTree);
NumberInterface evaluatedNumber = result.getValue();
if (evaluatedNumber == null) {
return ERR_EVAL;
}
String resultingString = evaluatedNumber.toString();
historyData.add(new HistoryModel(inputField.getText(), constructedTree.toString(), resultingString));
abacus.applyToContext(result.getResultingContext());
return resultingString;
} catch (ComputationInterruptedException exception) {
return ERR_STOP;
} catch (DomainException exception) {
} catch (ComputationInterruptedException | DomainException | EvaluationException exception) {
return exception.getMessage();
} catch (RuntimeException exception) {
exception.printStackTrace();