Merge commit '42b2e5ca519766e37ce6941ba4faecc9691cc403' into upstream

[debian/openrocket] / core / src / de / congrace / exp4j / NumberToken.java

diff --git a/core/src/de/congrace/exp4j/NumberToken.java b/core/src/de/congrace/exp4j/NumberToken.java
new file mode 100644 (file)
index 0000000..b765d45
--- /dev/null
+++ b/core/src/de/congrace/exp4j/NumberToken.java
@@ -0,0 +1,66 @@
+/*
+   Copyright 2011 frank asseg
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+ */
+package de.congrace.exp4j;
+
+import java.util.Map;
+import java.util.Stack;
+
+/**
+ * A {@link Token} for Numbers
+ * 
+ * @author fas@congrace.de
+ * 
+ */
+class NumberToken extends CalculationToken {
+
+       private final double doubleValue;
+
+       /**
+        * construct a new {@link NumberToken}
+        * 
+        * @param value
+        *            the value of the number as a {@link String}
+        */
+       NumberToken(String value) {
+               super(value);
+               this.doubleValue = Double.parseDouble(value);
+       }
+
+       @Override
+       public boolean equals(Object obj) {
+               if (obj instanceof NumberToken) {
+                       final NumberToken t = (NumberToken) obj;
+                       return t.getValue().equals(this.getValue());
+               }
+               return false;
+       }
+
+       @Override
+       public int hashCode() {
+               return getValue().hashCode();
+       }
+
+       @Override
+       void mutateStackForCalculation(Stack<Variable> stack, VariableSet variables) {
+               stack.push(new Variable("From number "+getValue()+" : "+hashCode(), this.doubleValue));
+       }
+
+       @Override
+       void mutateStackForInfixTranslation(Stack<Token> operatorStack, StringBuilder output) {
+               output.append(this.getValue()).append(' ');
+       }
+}