Added the DeletionQuery

src/main/java/de/gnmyt/sqltoolkit/queries/DeletionQuery.java

@@ -0,0 +1,60 @@
+package de.gnmyt.sqltoolkit.queries;
+
+import de.gnmyt.sqltoolkit.querybuilder.AbstractQuery;
+import de.gnmyt.sqltoolkit.querybuilder.SQLQuery;
+import de.gnmyt.sqltoolkit.querybuilder.StatementBuilder;
+
+import java.util.HashMap;
+
+import static de.gnmyt.sqltoolkit.querybuilder.QueryParameter.TABLE_NAME;
+import static de.gnmyt.sqltoolkit.querybuilder.QueryParameter.WHERE_LIST;
+
+public class DeletionQuery extends AbstractQuery {
+
+    @Override
+    public void defaults() {
+        addParameter(WHERE_LIST, new HashMap<Object, String>());
+        addParameter(TABLE_NAME, "default");
+    }
+
+    /**
+     * Builds the 'where'-list
+     *
+     * @return the 'where'-list as a string
+     */
+    public String buildWhereList() {
+        StatementBuilder whereString = new StatementBuilder();
+
+        HashMap<String, Object> whereList = (HashMap<String, Object>) getParameter(WHERE_LIST);
+
+        for (int i = 0; i < whereList.size(); i++) {
+            if (i == 0) whereString.append("WHERE");
+            else whereString.append("AND");
+
+            whereString.append("`"+whereList.keySet().toArray()[i]+"`").append("=").append("?");
+        }
+
+        return whereString.toString();
+    }
+
+    /**
+     * Gets the parameters
+     * @return the parameters
+     */
+    public Object[] getParameters() {
+
+        HashMap<String, Object> whereList = (HashMap<String, Object>) getParameter(WHERE_LIST);
+
+        return whereList.values().toArray();
+    }
+
+    @Override
+    public SQLQuery build() {
+
+        StatementBuilder builder = new StatementBuilder("DELETE").append("FROM").append((String) getParameter(TABLE_NAME));
+
+        builder.append(buildWhereList());
+
+        return new SQLQuery().setStatement(builder.toString()).setParameters(getParameters());
+    }
+}