http://git-wip-us.apache.org/repos/asf/hbase-site/blob/c4c0cfa5/apidocs/src-html/org/apache/hadoop/hbase/filter/MultipleColumnPrefixFilter.html ---------------------------------------------------------------------- diff --git a/apidocs/src-html/org/apache/hadoop/hbase/filter/MultipleColumnPrefixFilter.html b/apidocs/src-html/org/apache/hadoop/hbase/filter/MultipleColumnPrefixFilter.html index 8f5ce0e..7d6b874 100644 --- a/apidocs/src-html/org/apache/hadoop/hbase/filter/MultipleColumnPrefixFilter.html +++ b/apidocs/src-html/org/apache/hadoop/hbase/filter/MultipleColumnPrefixFilter.html @@ -126,94 +126,96 @@ <span class="sourceLineNo">118</span> /**<a name="line.118"></a> <span class="sourceLineNo">119</span> * @return The filter serialized using pb<a name="line.119"></a> <span class="sourceLineNo">120</span> */<a name="line.120"></a> -<span class="sourceLineNo">121</span> public byte [] toByteArray() {<a name="line.121"></a> -<span class="sourceLineNo">122</span> FilterProtos.MultipleColumnPrefixFilter.Builder builder =<a name="line.122"></a> -<span class="sourceLineNo">123</span> FilterProtos.MultipleColumnPrefixFilter.newBuilder();<a name="line.123"></a> -<span class="sourceLineNo">124</span> for (byte [] element : sortedPrefixes) {<a name="line.124"></a> -<span class="sourceLineNo">125</span> if (element != null) builder.addSortedPrefixes(UnsafeByteOperations.unsafeWrap(element));<a name="line.125"></a> -<span class="sourceLineNo">126</span> }<a name="line.126"></a> -<span class="sourceLineNo">127</span> return builder.build().toByteArray();<a name="line.127"></a> -<span class="sourceLineNo">128</span> }<a name="line.128"></a> -<span class="sourceLineNo">129</span><a name="line.129"></a> -<span class="sourceLineNo">130</span> /**<a name="line.130"></a> -<span class="sourceLineNo">131</span> * @param pbBytes A pb serialized {@link MultipleColumnPrefixFilter} instance<a name="line.131"></a> -<span class="sourceLineNo">132</span> * @return An instance of {@link MultipleColumnPrefixFilter} made from <code>bytes</code><a name="line.132"></a> -<span class="sourceLineNo">133</span> * @throws DeserializationException<a name="line.133"></a> -<span class="sourceLineNo">134</span> * @see #toByteArray<a name="line.134"></a> -<span class="sourceLineNo">135</span> */<a name="line.135"></a> -<span class="sourceLineNo">136</span> public static MultipleColumnPrefixFilter parseFrom(final byte [] pbBytes)<a name="line.136"></a> -<span class="sourceLineNo">137</span> throws DeserializationException {<a name="line.137"></a> -<span class="sourceLineNo">138</span> FilterProtos.MultipleColumnPrefixFilter proto;<a name="line.138"></a> -<span class="sourceLineNo">139</span> try {<a name="line.139"></a> -<span class="sourceLineNo">140</span> proto = FilterProtos.MultipleColumnPrefixFilter.parseFrom(pbBytes);<a name="line.140"></a> -<span class="sourceLineNo">141</span> } catch (InvalidProtocolBufferException e) {<a name="line.141"></a> -<span class="sourceLineNo">142</span> throw new DeserializationException(e);<a name="line.142"></a> -<span class="sourceLineNo">143</span> }<a name="line.143"></a> -<span class="sourceLineNo">144</span> int numPrefixes = proto.getSortedPrefixesCount();<a name="line.144"></a> -<span class="sourceLineNo">145</span> byte [][] prefixes = new byte[numPrefixes][];<a name="line.145"></a> -<span class="sourceLineNo">146</span> for (int i = 0; i < numPrefixes; ++i) {<a name="line.146"></a> -<span class="sourceLineNo">147</span> prefixes[i] = proto.getSortedPrefixes(i).toByteArray();<a name="line.147"></a> -<span class="sourceLineNo">148</span> }<a name="line.148"></a> -<span class="sourceLineNo">149</span><a name="line.149"></a> -<span class="sourceLineNo">150</span> return new MultipleColumnPrefixFilter(prefixes);<a name="line.150"></a> -<span class="sourceLineNo">151</span> }<a name="line.151"></a> -<span class="sourceLineNo">152</span><a name="line.152"></a> -<span class="sourceLineNo">153</span> /**<a name="line.153"></a> -<span class="sourceLineNo">154</span> * @param o the other filter to compare with<a name="line.154"></a> -<span class="sourceLineNo">155</span> * @return true if and only if the fields of the filter that are serialized<a name="line.155"></a> -<span class="sourceLineNo">156</span> * are equal to the corresponding fields in other. 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http://git-wip-us.apache.org/repos/asf/hbase-site/blob/c4c0cfa5/apidocs/src-html/org/apache/hadoop/hbase/filter/NullComparator.html ---------------------------------------------------------------------- diff --git a/apidocs/src-html/org/apache/hadoop/hbase/filter/NullComparator.html b/apidocs/src-html/org/apache/hadoop/hbase/filter/NullComparator.html index 1d2e328..2188cec 100644 --- a/apidocs/src-html/org/apache/hadoop/hbase/filter/NullComparator.html +++ b/apidocs/src-html/org/apache/hadoop/hbase/filter/NullComparator.html @@ -75,41 +75,43 @@ <span class="sourceLineNo">067</span> /**<a name="line.67"></a> <span class="sourceLineNo">068</span> * @return The comparator serialized using pb<a name="line.68"></a> <span class="sourceLineNo">069</span> */<a name="line.69"></a> -<span class="sourceLineNo">070</span> public byte [] toByteArray() {<a name="line.70"></a> -<span class="sourceLineNo">071</span> ComparatorProtos.NullComparator.Builder builder =<a name="line.71"></a> -<span class="sourceLineNo">072</span> ComparatorProtos.NullComparator.newBuilder();<a name="line.72"></a> -<span class="sourceLineNo">073</span> return builder.build().toByteArray();<a name="line.73"></a> -<span class="sourceLineNo">074</span> }<a name="line.74"></a> -<span class="sourceLineNo">075</span><a name="line.75"></a> -<span class="sourceLineNo">076</span> /**<a name="line.76"></a> -<span class="sourceLineNo">077</span> * @param pbBytes A pb serialized {@link NullComparator} instance<a name="line.77"></a> -<span class="sourceLineNo">078</span> * @return An instance of {@link NullComparator} made from <code>bytes</code><a name="line.78"></a> -<span class="sourceLineNo">079</span> * @throws DeserializationException<a name="line.79"></a> -<span class="sourceLineNo">080</span> * @see #toByteArray<a name="line.80"></a> -<span class="sourceLineNo">081</span> */<a name="line.81"></a> -<span class="sourceLineNo">082</span> public static NullComparator parseFrom(final byte [] pbBytes)<a name="line.82"></a> -<span class="sourceLineNo">083</span> throws DeserializationException {<a name="line.83"></a> -<span class="sourceLineNo">084</span> try {<a name="line.84"></a> -<span class="sourceLineNo">085</span> // Just parse. 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Used for testing.<a name="line.96"></a> -<span class="sourceLineNo">097</span> */<a name="line.97"></a> -<span class="sourceLineNo">098</span> boolean areSerializedFieldsEqual(ByteArrayComparable other) {<a name="line.98"></a> -<span class="sourceLineNo">099</span> if (other == this) return true;<a name="line.99"></a> -<span class="sourceLineNo">100</span> if (!(other instanceof NullComparator)) return false;<a name="line.100"></a> -<span class="sourceLineNo">101</span><a name="line.101"></a> -<span class="sourceLineNo">102</span> return super.areSerializedFieldsEqual(other);<a name="line.102"></a> -<span class="sourceLineNo">103</span> }<a name="line.103"></a> -<span class="sourceLineNo">104</span>}<a name="line.104"></a> +<span class="sourceLineNo">070</span> @Override<a name="line.70"></a> +<span class="sourceLineNo">071</span> public byte [] toByteArray() {<a name="line.71"></a> +<span class="sourceLineNo">072</span> ComparatorProtos.NullComparator.Builder builder =<a name="line.72"></a> +<span class="sourceLineNo">073</span> ComparatorProtos.NullComparator.newBuilder();<a name="line.73"></a> +<span class="sourceLineNo">074</span> return builder.build().toByteArray();<a name="line.74"></a> +<span class="sourceLineNo">075</span> }<a name="line.75"></a> +<span class="sourceLineNo">076</span><a name="line.76"></a> +<span class="sourceLineNo">077</span> /**<a name="line.77"></a> +<span class="sourceLineNo">078</span> * @param pbBytes A pb serialized {@link NullComparator} instance<a name="line.78"></a> +<span class="sourceLineNo">079</span> * @return An instance of {@link NullComparator} made from <code>bytes</code><a name="line.79"></a> +<span class="sourceLineNo">080</span> * @throws DeserializationException<a name="line.80"></a> +<span class="sourceLineNo">081</span> * @see #toByteArray<a name="line.81"></a> +<span class="sourceLineNo">082</span> */<a name="line.82"></a> +<span class="sourceLineNo">083</span> public static NullComparator parseFrom(final byte [] pbBytes)<a name="line.83"></a> +<span class="sourceLineNo">084</span> throws DeserializationException {<a name="line.84"></a> +<span class="sourceLineNo">085</span> try {<a name="line.85"></a> +<span class="sourceLineNo">086</span> // Just parse. Don't use what we parse since on end we are returning new NullComparator.<a name="line.86"></a> +<span class="sourceLineNo">087</span> ComparatorProtos.NullComparator.parseFrom(pbBytes);<a name="line.87"></a> +<span class="sourceLineNo">088</span> } catch (InvalidProtocolBufferException e) {<a name="line.88"></a> +<span class="sourceLineNo">089</span> throw new DeserializationException(e);<a name="line.89"></a> +<span class="sourceLineNo">090</span> }<a name="line.90"></a> +<span class="sourceLineNo">091</span> return new NullComparator();<a name="line.91"></a> +<span class="sourceLineNo">092</span> }<a name="line.92"></a> +<span class="sourceLineNo">093</span><a name="line.93"></a> +<span class="sourceLineNo">094</span> /**<a name="line.94"></a> +<span class="sourceLineNo">095</span> * @param other<a name="line.95"></a> +<span class="sourceLineNo">096</span> * @return true if and only if the fields of the comparator that are serialized<a name="line.96"></a> +<span class="sourceLineNo">097</span> * are equal to the corresponding fields in other. Used for testing.<a name="line.97"></a> +<span class="sourceLineNo">098</span> */<a name="line.98"></a> +<span class="sourceLineNo">099</span> @Override<a name="line.99"></a> +<span class="sourceLineNo">100</span> boolean areSerializedFieldsEqual(ByteArrayComparable other) {<a name="line.100"></a> +<span class="sourceLineNo">101</span> if (other == this) return true;<a name="line.101"></a> +<span class="sourceLineNo">102</span> if (!(other instanceof NullComparator)) return false;<a name="line.102"></a> +<span class="sourceLineNo">103</span><a name="line.103"></a> +<span class="sourceLineNo">104</span> return super.areSerializedFieldsEqual(other);<a name="line.104"></a> +<span class="sourceLineNo">105</span> }<a name="line.105"></a> +<span class="sourceLineNo">106</span>}<a name="line.106"></a> http://git-wip-us.apache.org/repos/asf/hbase-site/blob/c4c0cfa5/apidocs/src-html/org/apache/hadoop/hbase/filter/PageFilter.html ---------------------------------------------------------------------- diff --git a/apidocs/src-html/org/apache/hadoop/hbase/filter/PageFilter.html b/apidocs/src-html/org/apache/hadoop/hbase/filter/PageFilter.html index 00b536e..b46efbf 100644 --- a/apidocs/src-html/org/apache/hadoop/hbase/filter/PageFilter.html +++ b/apidocs/src-html/org/apache/hadoop/hbase/filter/PageFilter.html @@ -30,125 +30,135 @@ <span class="sourceLineNo">022</span>import java.util.ArrayList;<a name="line.22"></a> <span class="sourceLineNo">023</span><a name="line.23"></a> <span class="sourceLineNo">024</span>import org.apache.hadoop.hbase.Cell;<a name="line.24"></a> -<span class="sourceLineNo">025</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.25"></a> -<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.exceptions.DeserializationException;<a name="line.26"></a> -<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.FilterProtos;<a name="line.27"></a> -<span class="sourceLineNo">028</span><a name="line.28"></a> -<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.shaded.com.google.common.base.Preconditions;<a name="line.29"></a> -<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.shaded.com.google.protobuf.InvalidProtocolBufferException;<a name="line.30"></a> -<span class="sourceLineNo">031</span>/**<a name="line.31"></a> -<span class="sourceLineNo">032</span> * Implementation of Filter interface that limits results to a specific page<a name="line.32"></a> -<span class="sourceLineNo">033</span> * size. It terminates scanning once the number of filter-passed rows is &gt;<a name="line.33"></a> -<span class="sourceLineNo">034</span> * the given page size.<a name="line.34"></a> -<span class="sourceLineNo">035</span> * <p><a name="line.35"></a> -<span class="sourceLineNo">036</span> * Note that this filter cannot guarantee that the number of results returned<a name="line.36"></a> -<span class="sourceLineNo">037</span> * to a client are &lt;= page size. This is because the filter is applied<a name="line.37"></a> -<span class="sourceLineNo">038</span> * separately on different region servers. It does however optimize the scan of<a name="line.38"></a> -<span class="sourceLineNo">039</span> * individual HRegions by making sure that the page size is never exceeded<a name="line.39"></a> -<span class="sourceLineNo">040</span> * locally.<a name="line.40"></a> -<span class="sourceLineNo">041</span> */<a name="line.41"></a> -<span class="sourceLineNo">042</span>@InterfaceAudience.Public<a name="line.42"></a> -<span class="sourceLineNo">043</span>public class PageFilter extends FilterBase {<a name="line.43"></a> -<span class="sourceLineNo">044</span> private long pageSize = Long.MAX_VALUE;<a name="line.44"></a> -<span class="sourceLineNo">045</span> private int rowsAccepted = 0;<a name="line.45"></a> -<span class="sourceLineNo">046</span><a name="line.46"></a> -<span class="sourceLineNo">047</span> /**<a name="line.47"></a> -<span class="sourceLineNo">048</span> * Constructor that takes a maximum page size.<a name="line.48"></a> -<span class="sourceLineNo">049</span> *<a name="line.49"></a> -<span class="sourceLineNo">050</span> * @param pageSize Maximum result size.<a name="line.50"></a> -<span class="sourceLineNo">051</span> */<a name="line.51"></a> -<span class="sourceLineNo">052</span> public PageFilter(final long pageSize) {<a name="line.52"></a> -<span class="sourceLineNo">053</span> Preconditions.checkArgument(pageSize >= 0, "must be positive %s", pageSize);<a name="line.53"></a> -<span class="sourceLineNo">054</span> this.pageSize = pageSize;<a name="line.54"></a> -<span class="sourceLineNo">055</span> }<a name="line.55"></a> -<span class="sourceLineNo">056</span><a name="line.56"></a> -<span class="sourceLineNo">057</span> public long getPageSize() {<a name="line.57"></a> -<span class="sourceLineNo">058</span> return pageSize;<a name="line.58"></a> -<span class="sourceLineNo">059</span> }<a name="line.59"></a> -<span class="sourceLineNo">060</span><a name="line.60"></a> -<span class="sourceLineNo">061</span> @Override<a name="line.61"></a> -<span class="sourceLineNo">062</span> public boolean filterRowKey(Cell cell) throws IOException {<a name="line.62"></a> -<span class="sourceLineNo">063</span> // Impl in FilterBase might do unnecessary copy for Off heap backed Cells.<a name="line.63"></a> -<span class="sourceLineNo">064</span> if (filterAllRemaining()) return true;<a name="line.64"></a> -<span class="sourceLineNo">065</span> return false;<a name="line.65"></a> -<span class="sourceLineNo">066</span> }<a name="line.66"></a> -<span class="sourceLineNo">067</span><a name="line.67"></a> -<span class="sourceLineNo">068</span> @Deprecated<a name="line.68"></a> -<span class="sourceLineNo">069</span> @Override<a name="line.69"></a> -<span class="sourceLineNo">070</span> public ReturnCode filterKeyValue(final Cell c) throws IOException {<a name="line.70"></a> -<span class="sourceLineNo">071</span> return filterCell(c);<a name="line.71"></a> -<span class="sourceLineNo">072</span> }<a name="line.72"></a> -<span class="sourceLineNo">073</span><a name="line.73"></a> -<span class="sourceLineNo">074</span> @Override<a name="line.74"></a> -<span class="sourceLineNo">075</span> public ReturnCode filterCell(final Cell ignored) throws IOException {<a name="line.75"></a> -<span class="sourceLineNo">076</span> return ReturnCode.INCLUDE;<a name="line.76"></a> -<span class="sourceLineNo">077</span> }<a name="line.77"></a> -<span class="sourceLineNo">078</span> <a name="line.78"></a> -<span class="sourceLineNo">079</span> public boolean filterAllRemaining() {<a name="line.79"></a> -<span class="sourceLineNo">080</span> return this.rowsAccepted >= this.pageSize;<a name="line.80"></a> -<span class="sourceLineNo">081</span> }<a name="line.81"></a> -<span class="sourceLineNo">082</span><a name="line.82"></a> -<span class="sourceLineNo">083</span> public boolean filterRow() {<a name="line.83"></a> -<span class="sourceLineNo">084</span> this.rowsAccepted++;<a name="line.84"></a> -<span class="sourceLineNo">085</span> return this.rowsAccepted > this.pageSize;<a name="line.85"></a> -<span class="sourceLineNo">086</span> }<a name="line.86"></a> -<span class="sourceLineNo">087</span> <a name="line.87"></a> -<span class="sourceLineNo">088</span> public boolean hasFilterRow() {<a name="line.88"></a> -<span class="sourceLineNo">089</span> return true;<a name="line.89"></a> -<span class="sourceLineNo">090</span> }<a name="line.90"></a> -<span class="sourceLineNo">091</span><a name="line.91"></a> -<span class="sourceLineNo">092</span> public static Filter createFilterFromArguments(ArrayList<byte []> filterArguments) {<a name="line.92"></a> -<span class="sourceLineNo">093</span> Preconditions.checkArgument(filterArguments.size() == 1,<a name="line.93"></a> -<span class="sourceLineNo">094</span> "Expected 1 but got: %s", filterArguments.size());<a name="line.94"></a> -<span class="sourceLineNo">095</span> long pageSize = ParseFilter.convertByteArrayToLong(filterArguments.get(0));<a name="line.95"></a> -<span class="sourceLineNo">096</span> return new PageFilter(pageSize);<a name="line.96"></a> -<span class="sourceLineNo">097</span> }<a name="line.97"></a> -<span class="sourceLineNo">098</span><a name="line.98"></a> -<span class="sourceLineNo">099</span> /**<a name="line.99"></a> -<span class="sourceLineNo">100</span> * @return The filter serialized using pb<a name="line.100"></a> -<span class="sourceLineNo">101</span> */<a name="line.101"></a> -<span class="sourceLineNo">102</span> public byte [] toByteArray() {<a name="line.102"></a> -<span class="sourceLineNo">103</span> FilterProtos.PageFilter.Builder builder =<a name="line.103"></a> -<span class="sourceLineNo">104</span> FilterProtos.PageFilter.newBuilder();<a name="line.104"></a> -<span class="sourceLineNo">105</span> builder.setPageSize(this.pageSize);<a name="line.105"></a> -<span class="sourceLineNo">106</span> return builder.build().toByteArray();<a name="line.106"></a> -<span class="sourceLineNo">107</span> }<a name="line.107"></a> -<span class="sourceLineNo">108</span><a name="line.108"></a> -<span class="sourceLineNo">109</span> /**<a name="line.109"></a> -<span class="sourceLineNo">110</span> * @param pbBytes A pb serialized {@link PageFilter} instance<a name="line.110"></a> -<span class="sourceLineNo">111</span> * @return An instance of {@link PageFilter} made from <code>bytes</code><a name="line.111"></a> -<span class="sourceLineNo">112</span> * @throws DeserializationException<a name="line.112"></a> -<span class="sourceLineNo">113</span> * @see #toByteArray<a name="line.113"></a> -<span class="sourceLineNo">114</span> */<a name="line.114"></a> -<span class="sourceLineNo">115</span> public static PageFilter parseFrom(final byte [] pbBytes)<a name="line.115"></a> -<span class="sourceLineNo">116</span> throws DeserializationException {<a name="line.116"></a> -<span class="sourceLineNo">117</span> FilterProtos.PageFilter proto;<a name="line.117"></a> -<span class="sourceLineNo">118</span> try {<a name="line.118"></a> -<span class="sourceLineNo">119</span> proto = FilterProtos.PageFilter.parseFrom(pbBytes);<a name="line.119"></a> -<span class="sourceLineNo">120</span> } catch (InvalidProtocolBufferException e) {<a name="line.120"></a> -<span class="sourceLineNo">121</span> throw new DeserializationException(e);<a name="line.121"></a> -<span class="sourceLineNo">122</span> }<a name="line.122"></a> -<span class="sourceLineNo">123</span> return new PageFilter(proto.getPageSize());<a name="line.123"></a> -<span class="sourceLineNo">124</span> }<a name="line.124"></a> -<span class="sourceLineNo">125</span><a name="line.125"></a> -<span class="sourceLineNo">126</span> /**<a name="line.126"></a> -<span class="sourceLineNo">127</span> * @param other<a name="line.127"></a> -<span class="sourceLineNo">128</span> * @return true if and only if the fields of the filter that are serialized<a name="line.128"></a> -<span class="sourceLineNo">129</span> * are equal to the corresponding fields in other. Used for testing.<a name="line.129"></a> -<span class="sourceLineNo">130</span> */<a name="line.130"></a> -<span class="sourceLineNo">131</span> boolean areSerializedFieldsEqual(Filter o) {<a name="line.131"></a> -<span class="sourceLineNo">132</span> if (o == this) return true;<a name="line.132"></a> -<span class="sourceLineNo">133</span> if (!(o instanceof PageFilter)) return false;<a name="line.133"></a> -<span class="sourceLineNo">134</span><a name="line.134"></a> -<span class="sourceLineNo">135</span> PageFilter other = (PageFilter)o;<a name="line.135"></a> -<span class="sourceLineNo">136</span> return this.getPageSize() == other.getPageSize();<a name="line.136"></a> -<span class="sourceLineNo">137</span> }<a name="line.137"></a> -<span class="sourceLineNo">138</span><a name="line.138"></a> -<span class="sourceLineNo">139</span> @Override<a name="line.139"></a> -<span class="sourceLineNo">140</span> public String toString() {<a name="line.140"></a> -<span class="sourceLineNo">141</span> return this.getClass().getSimpleName() + " " + this.pageSize;<a name="line.141"></a> -<span class="sourceLineNo">142</span> }<a name="line.142"></a> -<span class="sourceLineNo">143</span>}<a name="line.143"></a> +<span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.exceptions.DeserializationException;<a name="line.25"></a> +<span class="sourceLineNo">026</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.26"></a> +<span class="sourceLineNo">027</span><a name="line.27"></a> +<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.shaded.com.google.common.base.Preconditions;<a name="line.28"></a> +<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.shaded.com.google.protobuf.InvalidProtocolBufferException;<a name="line.29"></a> +<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.FilterProtos;<a name="line.30"></a> +<span class="sourceLineNo">031</span><a name="line.31"></a> +<span class="sourceLineNo">032</span>/**<a name="line.32"></a> +<span class="sourceLineNo">033</span> * Implementation of Filter interface that limits results to a specific page<a name="line.33"></a> +<span class="sourceLineNo">034</span> * size. It terminates scanning once the number of filter-passed rows is &gt;<a name="line.34"></a> +<span class="sourceLineNo">035</span> * the given page size.<a name="line.35"></a> +<span class="sourceLineNo">036</span> * <p><a name="line.36"></a> +<span class="sourceLineNo">037</span> * Note that this filter cannot guarantee that the number of results returned<a name="line.37"></a> +<span class="sourceLineNo">038</span> * to a client are &lt;= page size. This is because the filter is applied<a name="line.38"></a> +<span class="sourceLineNo">039</span> * separately on different region servers. It does however optimize the scan of<a name="line.39"></a> +<span class="sourceLineNo">040</span> * individual HRegions by making sure that the page size is never exceeded<a name="line.40"></a> +<span class="sourceLineNo">041</span> * locally.<a name="line.41"></a> +<span class="sourceLineNo">042</span> */<a name="line.42"></a> +<span class="sourceLineNo">043</span>@InterfaceAudience.Public<a name="line.43"></a> +<span class="sourceLineNo">044</span>public class PageFilter extends FilterBase {<a name="line.44"></a> +<span class="sourceLineNo">045</span> private long pageSize = Long.MAX_VALUE;<a name="line.45"></a> +<span class="sourceLineNo">046</span> private int rowsAccepted = 0;<a name="line.46"></a> +<span class="sourceLineNo">047</span><a name="line.47"></a> +<span class="sourceLineNo">048</span> /**<a name="line.48"></a> +<span class="sourceLineNo">049</span> * Constructor that takes a maximum page size.<a name="line.49"></a> +<span class="sourceLineNo">050</span> *<a name="line.50"></a> +<span class="sourceLineNo">051</span> * @param pageSize Maximum result size.<a name="line.51"></a> +<span class="sourceLineNo">052</span> */<a name="line.52"></a> +<span class="sourceLineNo">053</span> public PageFilter(final long pageSize) {<a name="line.53"></a> +<span class="sourceLineNo">054</span> Preconditions.checkArgument(pageSize >= 0, "must be positive %s", pageSize);<a name="line.54"></a> +<span class="sourceLineNo">055</span> this.pageSize = pageSize;<a name="line.55"></a> +<span class="sourceLineNo">056</span> }<a name="line.56"></a> +<span class="sourceLineNo">057</span><a name="line.57"></a> +<span class="sourceLineNo">058</span> public long getPageSize() {<a name="line.58"></a> +<span class="sourceLineNo">059</span> return pageSize;<a name="line.59"></a> +<span class="sourceLineNo">060</span> }<a name="line.60"></a> +<span class="sourceLineNo">061</span><a name="line.61"></a> +<span class="sourceLineNo">062</span> @Override<a name="line.62"></a> +<span class="sourceLineNo">063</span> public boolean filterRowKey(Cell cell) throws IOException {<a name="line.63"></a> +<span class="sourceLineNo">064</span> // Impl in FilterBase might do unnecessary copy for Off heap backed Cells.<a name="line.64"></a> +<span class="sourceLineNo">065</span> if (filterAllRemaining()) return true;<a name="line.65"></a> +<span class="sourceLineNo">066</span> return false;<a name="line.66"></a> +<span class="sourceLineNo">067</span> }<a name="line.67"></a> +<span class="sourceLineNo">068</span><a name="line.68"></a> +<span class="sourceLineNo">069</span> @Deprecated<a name="line.69"></a> +<span class="sourceLineNo">070</span> @Override<a name="line.70"></a> +<span class="sourceLineNo">071</span> public ReturnCode filterKeyValue(final Cell c) throws IOException {<a name="line.71"></a> +<span class="sourceLineNo">072</span> return filterCell(c);<a name="line.72"></a> +<span class="sourceLineNo">073</span> }<a name="line.73"></a> +<span class="sourceLineNo">074</span><a name="line.74"></a> +<span class="sourceLineNo">075</span> @Override<a name="line.75"></a> +<span class="sourceLineNo">076</span> public ReturnCode filterCell(final Cell ignored) throws IOException {<a name="line.76"></a> +<span class="sourceLineNo">077</span> return ReturnCode.INCLUDE;<a name="line.77"></a> +<span class="sourceLineNo">078</span> }<a name="line.78"></a> +<span class="sourceLineNo">079</span><a name="line.79"></a> +<span class="sourceLineNo">080</span> @Override<a name="line.80"></a> +<span class="sourceLineNo">081</span> public boolean filterAllRemaining() {<a name="line.81"></a> +<span class="sourceLineNo">082</span> return this.rowsAccepted >= this.pageSize;<a name="line.82"></a> +<span class="sourceLineNo">083</span> }<a name="line.83"></a> +<span class="sourceLineNo">084</span><a name="line.84"></a> +<span class="sourceLineNo">085</span> @Override<a name="line.85"></a> +<span class="sourceLineNo">086</span> public boolean filterRow() {<a name="line.86"></a> +<span class="sourceLineNo">087</span> this.rowsAccepted++;<a name="line.87"></a> +<span class="sourceLineNo">088</span> return this.rowsAccepted > this.pageSize;<a name="line.88"></a> +<span class="sourceLineNo">089</span> }<a name="line.89"></a> +<span class="sourceLineNo">090</span> <a name="line.90"></a> +<span class="sourceLineNo">091</span> @Override<a name="line.91"></a> +<span class="sourceLineNo">092</span> public boolean hasFilterRow() {<a name="line.92"></a> +<span class="sourceLineNo">093</span> return true;<a name="line.93"></a> +<span class="sourceLineNo">094</span> }<a name="line.94"></a> +<span class="sourceLineNo">095</span><a name="line.95"></a> +<span class="sourceLineNo">096</span> public static Filter createFilterFromArguments(ArrayList<byte []> filterArguments) {<a name="line.96"></a> +<span class="sourceLineNo">097</span> Preconditions.checkArgument(filterArguments.size() == 1,<a name="line.97"></a> +<span class="sourceLineNo">098</span> "Expected 1 but got: %s", filterArguments.size());<a name="line.98"></a> +<span class="sourceLineNo">099</span> long pageSize = ParseFilter.convertByteArrayToLong(filterArguments.get(0));<a name="line.99"></a> +<span class="sourceLineNo">100</span> return new PageFilter(pageSize);<a name="line.100"></a> +<span class="sourceLineNo">101</span> }<a name="line.101"></a> +<span class="sourceLineNo">102</span><a name="line.102"></a> +<span class="sourceLineNo">103</span> /**<a name="line.103"></a> +<span class="sourceLineNo">104</span> * @return The filter serialized using pb<a name="line.104"></a> +<span class="sourceLineNo">105</span> */<a name="line.105"></a> +<span class="sourceLineNo">106</span> @Override<a name="line.106"></a> +<span class="sourceLineNo">107</span> public byte [] toByteArray() {<a name="line.107"></a> +<span class="sourceLineNo">108</span> FilterProtos.PageFilter.Builder builder =<a name="line.108"></a> +<span class="sourceLineNo">109</span> FilterProtos.PageFilter.newBuilder();<a name="line.109"></a> +<span class="sourceLineNo">110</span> builder.setPageSize(this.pageSize);<a name="line.110"></a> +<span class="sourceLineNo">111</span> return builder.build().toByteArray();<a name="line.111"></a> +<span class="sourceLineNo">112</span> }<a name="line.112"></a> +<span class="sourceLineNo">113</span><a name="line.113"></a> +<span class="sourceLineNo">114</span> /**<a name="line.114"></a> +<span class="sourceLineNo">115</span> * @param pbBytes A pb serialized {@link PageFilter} instance<a name="line.115"></a> +<span class="sourceLineNo">116</span> * @return An instance of {@link PageFilter} made from <code>bytes</code><a name="line.116"></a> +<span class="sourceLineNo">117</span> * @throws DeserializationException<a name="line.117"></a> +<span class="sourceLineNo">118</span> * @see #toByteArray<a name="line.118"></a> +<span class="sourceLineNo">119</span> */<a name="line.119"></a> +<span class="sourceLineNo">120</span> public static PageFilter parseFrom(final byte [] pbBytes)<a name="line.120"></a> +<span class="sourceLineNo">121</span> throws DeserializationException {<a name="line.121"></a> +<span class="sourceLineNo">122</span> FilterProtos.PageFilter proto;<a name="line.122"></a> +<span class="sourceLineNo">123</span> try {<a name="line.123"></a> +<span class="sourceLineNo">124</span> proto = FilterProtos.PageFilter.parseFrom(pbBytes);<a name="line.124"></a> +<span class="sourceLineNo">125</span> } catch (InvalidProtocolBufferException e) {<a name="line.125"></a> +<span class="sourceLineNo">126</span> throw new DeserializationException(e);<a name="line.126"></a> +<span class="sourceLineNo">127</span> }<a name="line.127"></a> +<span class="sourceLineNo">128</span> return new PageFilter(proto.getPageSize());<a name="line.128"></a> +<span class="sourceLineNo">129</span> }<a name="line.129"></a> +<span class="sourceLineNo">130</span><a name="line.130"></a> +<span class="sourceLineNo">131</span> /**<a name="line.131"></a> +<span class="sourceLineNo">132</span> * @param o other Filter to compare with<a name="line.132"></a> +<span class="sourceLineNo">133</span> * @return true if and only if the fields of the filter that are serialized are equal to the<a name="line.133"></a> +<span class="sourceLineNo">134</span> * corresponding fields in other. Used for testing.<a name="line.134"></a> +<span class="sourceLineNo">135</span> */<a name="line.135"></a> +<span class="sourceLineNo">136</span> @Override<a name="line.136"></a> +<span class="sourceLineNo">137</span> boolean areSerializedFieldsEqual(Filter o) {<a name="line.137"></a> +<span class="sourceLineNo">138</span> if (o == this) {<a name="line.138"></a> +<span class="sourceLineNo">139</span> return true;<a name="line.139"></a> +<span class="sourceLineNo">140</span> }<a name="line.140"></a> +<span class="sourceLineNo">141</span> if (!(o instanceof PageFilter)) {<a name="line.141"></a> +<span class="sourceLineNo">142</span> return false;<a name="line.142"></a> +<span class="sourceLineNo">143</span> }<a name="line.143"></a> +<span class="sourceLineNo">144</span><a name="line.144"></a> +<span class="sourceLineNo">145</span> PageFilter other = (PageFilter)o;<a name="line.145"></a> +<span class="sourceLineNo">146</span> return this.getPageSize() == other.getPageSize();<a name="line.146"></a> +<span class="sourceLineNo">147</span> }<a name="line.147"></a> +<span class="sourceLineNo">148</span><a name="line.148"></a> +<span class="sourceLineNo">149</span> @Override<a name="line.149"></a> +<span class="sourceLineNo">150</span> public String toString() {<a name="line.150"></a> +<span class="sourceLineNo">151</span> return this.getClass().getSimpleName() + " " + this.pageSize;<a name="line.151"></a> +<span class="sourceLineNo">152</span> }<a name="line.152"></a> +<span class="sourceLineNo">153</span>}<a name="line.153"></a>
