Query.after and Query.fetchAfter supports subclass parameter.

3 files changed, 74 insertions, 4 deletions

diff --git a/src/main/java/com/amazon/carbonado/qe/AbstractQuery.java b/src/main/java/com/amazon/carbonado/qe/AbstractQuery.java
index bd27d9a..21c7e3f 100644
--- a/src/main/java/com/amazon/carbonado/qe/AbstractQuery.java
+++ b/src/main/java/com/amazon/carbonado/qe/AbstractQuery.java
@@ -45,18 +45,22 @@ public abstract class AbstractQuery<S extends Storable> implements Query<S>, App
     protected AbstractQuery() {

     }

 

+    @Override

     public Query<S> and(String filter) throws FetchException {

         return and(Filter.filterFor(getStorableType(), filter));

     }

 

+    @Override

     public Query<S> or(String filter) throws FetchException {

         return or(Filter.filterFor(getStorableType(), filter));

     }

 

-    public Cursor<S> fetchAfter(S start) throws FetchException {

+    @Override

+    public <T extends S> Cursor<S> fetchAfter(T start) throws FetchException {

         return after(start).fetch();

     }

 

+    @Override

     public S loadOne() throws FetchException {

         S obj = tryLoadOne();

         if (obj == null) {

@@ -65,6 +69,7 @@ public abstract class AbstractQuery<S extends Storable> implements Query<S>, App
         return obj;

     }

 

+    @Override

     public S tryLoadOne() throws FetchException {

         Cursor<S> cursor = fetch();

         try {

@@ -82,12 +87,14 @@ public abstract class AbstractQuery<S extends Storable> implements Query<S>, App
         }

     }

 

+    @Override

     public void deleteOne() throws PersistException {

         if (!tryDeleteOne()) {

             throw new PersistNoneException(toString());

         }

     }

 

+    @Override

     public boolean printNative() {

         try {

             return printNative(System.out);

@@ -97,10 +104,12 @@ public abstract class AbstractQuery<S extends Storable> implements Query<S>, App
         }

     }

 

+    @Override

     public boolean printNative(Appendable app) throws IOException {

         return printNative(app, 0);

     }

 

+    @Override

     public boolean printPlan() {

         try {

             return printPlan(System.out);

@@ -110,6 +119,7 @@ public abstract class AbstractQuery<S extends Storable> implements Query<S>, App
         }

     }

 

+    @Override

     public boolean printPlan(Appendable app) throws IOException {

         return printPlan(app, 0);

     }

diff --git a/src/main/java/com/amazon/carbonado/qe/EmptyQuery.java b/src/main/java/com/amazon/carbonado/qe/EmptyQuery.java
index e9431f3..873b8a7 100644
--- a/src/main/java/com/amazon/carbonado/qe/EmptyQuery.java
+++ b/src/main/java/com/amazon/carbonado/qe/EmptyQuery.java
@@ -81,6 +81,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
         mOrdering = OrderingList.emptyList();

     }

 

+    @Override

     public Class<S> getStorableType() {

         return mFactory.getStorableType();

     }

@@ -88,6 +89,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always returns a {@link com.amazon.carbonado.filter.ClosedFilter ClosedFilter}.

      */

+    @Override

     public Filter<S> getFilter() {

         return Filter.getClosedFilter(getStorableType());

     }

@@ -95,6 +97,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always returns null.

      */

+    @Override

     public FilterValues<S> getFilterValues() {

         return null;

     }

@@ -102,6 +105,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always returns zero.

      */

+    @Override

     public int getBlankParameterCount() {

         return 0;

     }

@@ -109,6 +113,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always throws an IllegalStateException.

      */

+    @Override

     public Query<S> with(int value) {

         throw error();

     }

@@ -116,6 +121,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always throws an IllegalStateException.

      */

+    @Override

     public Query<S> with(long value) {

         throw error();

     }

@@ -123,6 +129,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always throws an IllegalStateException.

      */

+    @Override

     public Query<S> with(float value) {

         throw error();

     }

@@ -130,6 +137,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always throws an IllegalStateException.

      */

+    @Override

     public Query<S> with(double value) {

         throw error();

     }

@@ -137,6 +145,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always throws an IllegalStateException.

      */

+    @Override

     public Query<S> with(boolean value) {

         throw error();

     }

@@ -144,6 +153,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always throws an IllegalStateException.

      */

+    @Override

     public Query<S> with(char value) {

         throw error();

     }

@@ -151,6 +161,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always throws an IllegalStateException.

      */

+    @Override

     public Query<S> with(byte value) {

         throw error();

     }

@@ -158,6 +169,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always throws an IllegalStateException.

      */

+    @Override

     public Query<S> with(short value) {

         throw error();

     }

@@ -165,6 +177,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always throws an IllegalStateException.

      */

+    @Override

     public Query<S> with(Object value) {

         throw error();

     }

@@ -172,6 +185,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Throws an IllegalStateException unless no values passed in.

      */

+    @Override

     public Query<S> withValues(Object... values) {

         if (values == null || values.length == 0) {

             return this;

@@ -182,10 +196,12 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always throws an IllegalStateException.

      */

+    @Override

     public Query<S> and(Filter<S> filter) {

         throw new IllegalStateException("Query is already guaranteed to fetch nothing");

     }

 

+    @Override

     public Query<S> or(Filter<S> filter) throws FetchException {

         return mFactory.query(filter, null, mOrdering, null);

     }

@@ -193,25 +209,30 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Returns a query that fetches everything, possibly in a specified order.

      */

+    @Override

     public Query<S> not() throws FetchException {

         return mFactory.query(null, null, mOrdering, null);

     }

 

+    @Override

     public Query<S> orderBy(String property) throws FetchException {

         return new EmptyQuery<S>(mFactory, property);

     }

 

+    @Override

     public Query<S> orderBy(String... properties) throws FetchException {

         return new EmptyQuery<S>(mFactory, properties);

     }

 

-    public Query<S> after(S start) {

+    @Override

+    public <T extends S> Query<S> after(T start) {

         return this;

     }

 

     /**

      * Always returns an {@link EmptyCursor}.

      */

+    @Override

     public Cursor<S> fetch() {

         return EmptyCursor.the();

     }

@@ -219,6 +240,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always returns an {@link EmptyCursor}.

      */

+    @Override

     public Cursor<S> fetchSlice(long from, Long to) {

         checkSliceArguments(from, to);

         return EmptyCursor.the();

@@ -235,6 +257,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always returns false.

      */

+    @Override

     public boolean tryDeleteOne() {

         return false;

     }

@@ -242,12 +265,14 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Does nothing.

      */

+    @Override

     public void deleteAll() {

     }

 

     /**

      * Always returns zero.

      */

+    @Override

     public long count() {

         return 0;

     }

@@ -255,10 +280,12 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always returns false.

      */

+    @Override

     public boolean exists() {

         return false;

     }

 

+    @Override

     public void appendTo(Appendable app) throws IOException {

         app.append("Query {type=");

         app.append(getStorableType().getName());

@@ -282,6 +309,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always returns false.

      */

+    @Override

     public boolean printNative(Appendable app, int indentLevel) {

         return false;

     }

@@ -289,6 +317,7 @@ public final class EmptyQuery<S extends Storable> extends AbstractQuery<S> {
     /**

      * Always returns false.

      */

+    @Override

     public boolean printPlan(Appendable app, int indentLevel) {

         return false;

     }

diff --git a/src/main/java/com/amazon/carbonado/qe/StandardQuery.java b/src/main/java/com/amazon/carbonado/qe/StandardQuery.java
index 736f31f..08cd27a 100644
--- a/src/main/java/com/amazon/carbonado/qe/StandardQuery.java
+++ b/src/main/java/com/amazon/carbonado/qe/StandardQuery.java
@@ -90,10 +90,12 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         mHints = hints;

     }

 

+    @Override

     public Class<S> getStorableType() {

         return queryFactory().getStorableType();

     }

 

+    @Override

     public Filter<S> getFilter() {

         Filter<S> filter = mFilter;

         if (filter == null) {

@@ -102,50 +104,62 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         return filter;

     }

 

+    @Override

     public FilterValues<S> getFilterValues() {

         return mValues;

     }

 

+    @Override

     public int getBlankParameterCount() {

         return mValues == null ? 0 : mValues.getBlankParameterCount();

     }

 

+    @Override

     public Query<S> with(int value) {

         return newInstance(requireValues().with(value));

     }

 

+    @Override

     public Query<S> with(long value) {

         return newInstance(requireValues().with(value));

     }

 

+    @Override

     public Query<S> with(float value) {

         return newInstance(requireValues().with(value));

     }

 

+    @Override

     public Query<S> with(double value) {

         return newInstance(requireValues().with(value));

     }

 

+    @Override

     public Query<S> with(boolean value) {

         return newInstance(requireValues().with(value));

     }

 

+    @Override

     public Query<S> with(char value) {

         return newInstance(requireValues().with(value));

     }

 

+    @Override

     public Query<S> with(byte value) {

         return newInstance(requireValues().with(value));

     }

 

+    @Override

     public Query<S> with(short value) {

         return newInstance(requireValues().with(value));

     }

 

+    @Override

     public Query<S> with(Object value) {

         return newInstance(requireValues().with(value));

     }

 

+    @Override

     public Query<S> withValues(Object... values) {

         if (values == null || values.length == 0) {

             return this;

@@ -153,6 +167,7 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         return newInstance(requireValues().withValues(values));

     }

 

+    @Override

     public Query<S> and(Filter<S> filter) throws FetchException {

         Filter<S> newFilter;

         FilterValues<S> newValues;

@@ -172,6 +187,7 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         return createQuery(newFilter, newValues, mOrdering, mHints);

     }

 

+    @Override

     public Query<S> or(Filter<S> filter) throws FetchException {

         if (mFilter == null) {

             throw new IllegalStateException("Query is already guaranteed to fetch everything");

@@ -187,6 +203,7 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         return createQuery(newFilter, newValues, mOrdering, mHints);

     }

 

+    @Override

     public Query<S> not() throws FetchException {

         if (mFilter == null) {

             return new EmptyQuery<S>(queryFactory(), mOrdering);

@@ -199,17 +216,20 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         return createQuery(newFilter, newValues, mOrdering, mHints);

     }

 

+    @Override

     public Query<S> orderBy(String property) throws FetchException {

         return createQuery(mFilter, mValues,

                            OrderingList.get(getStorableType(), property), mHints);

     }

 

+    @Override

     public Query<S> orderBy(String... properties) throws FetchException {

         return createQuery(mFilter, mValues,

                            OrderingList.get(getStorableType(), properties), mHints);

     }

 

-    public Query<S> after(S start) throws FetchException {

+    @Override

+    public <T extends S> Query<S> after(T start) throws FetchException {

         OrderingList<S> orderings;

         if (start == null || (orderings = mOrdering).size() == 0) {

             return this;

@@ -217,7 +237,9 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         return buildAfter(start, orderings);

     }

 

-    private Query<S> buildAfter(S start, OrderingList<S> orderings) throws FetchException {

+    private <T extends S> Query<S> buildAfter(T start, OrderingList<S> orderings)

+        throws FetchException

+    {

         Class<S> storableType = getStorableType();

         Filter<S> orderFilter = Filter.getClosedFilter(storableType);

         Filter<S> openFilter = Filter.getOpenFilter(storableType);

@@ -256,6 +278,7 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         return query;

     }

 

+    @Override

     public Cursor<S> fetch() throws FetchException {

         try {

             return executor().fetch(mValues);

@@ -264,6 +287,7 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         }

     }

 

+    @Override

     public Cursor<S> fetchSlice(long from, Long to) throws FetchException {

         if (!checkSliceArguments(from, to)) {

             return fetch();

@@ -277,6 +301,7 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         }

     }

 

+    @Override

     public boolean tryDeleteOne() throws PersistException {

         Transaction txn = enterTransaction(IsolationLevel.READ_COMMITTED);

         try {

@@ -308,6 +333,7 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         }

     }

 

+    @Override

     public void deleteAll() throws PersistException {

         Transaction txn = enterTransaction(IsolationLevel.READ_COMMITTED);

         try {

@@ -331,6 +357,7 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         }

     }

 

+    @Override

     public long count() throws FetchException {

         try {

             return executor().count(mValues);

@@ -339,6 +366,7 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         }

     }

 

+    @Override

     public boolean exists() throws FetchException {

         Cursor<S> cursor = fetchSlice(0L, 1L);

         try {

@@ -348,6 +376,7 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         }

     }

 

+    @Override

     public boolean printNative(Appendable app, int indentLevel) throws IOException {

         try {

             return executor().printNative(app, indentLevel, mValues);

@@ -356,6 +385,7 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         }

     }

 

+    @Override

     public boolean printPlan(Appendable app, int indentLevel) throws IOException {

         try {

             return executor().printPlan(app, indentLevel, mValues);

@@ -394,6 +424,7 @@ public abstract class StandardQuery<S extends Storable> extends AbstractQuery<S>
         return false;

     }

 

+    @Override

     public void appendTo(Appendable app) throws IOException {

         app.append("Query {type=");

         app.append(getStorableType().getName());