Initialize gradle project

1 files changed, 89 insertions, 0 deletions

diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/model/ValueSimple.java b/src/main/java/pl/edu/mimuw/cloudatlas/model/ValueSimple.java
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+/**
+ * Copyright (c) 2014, University of Warsaw
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are permitted
+ * provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this list of
+ * conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
+ * conditions and the following disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
+ * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package pl.edu.mimuw.cloudatlas.model;
+
+/**
+ * Class for wrapping Java types into <code>Value</code> objects.
+ * <p>
+ * This class is immutable.
+ *
+ * @param <T> a wrapped type
+ */
+abstract class ValueSimple<T> extends Value {
+    private T value;
+
+    /**
+     * Constructs a new <code>Value</code> wrapping the specified <code>value</code>.
+     *
+     * @param value the value to wrap
+     */
+    public ValueSimple(T value) {
+        setValue(value);
+    }
+
+    /**
+     * Returns a hash code value for this object. This is a hash code of underlying wrapped object.
+     *
+     * @return the hash code for this value
+     */
+    @Override
+    public int hashCode() {
+        return getValue().hashCode();
+    }
+
+    /**
+     * Gets a wrapped object.
+     *
+     * @return the wrapped value
+     */
+    public T getValue() {
+        return value;
+    }
+
+    /**
+     * Sets a wrapped value. This method is not public to ensure that the underlying value cannot be changed.
+     *
+     * @param value the value to set
+     */
+    void setValue(T value) {
+        this.value = value;
+    }
+
+    @Override
+    public boolean isNull() {
+        return value == null;
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public Value isEqual(Value v) {
+        sameTypesOrThrow(v, Operation.EQUAL);
+        if(isNull() && v.isNull())
+            return new ValueBoolean(true);
+        else if(isNull() || v.isNull())
+            return new ValueBoolean(false);
+        return new ValueBoolean(value.equals(((ValueSimple<T>)v).getValue()));
+    }
+}