author | František Kučera <franta-hg@frantovo.cz> |
Mon, 23 Dec 2013 16:14:03 +0100 | |
branch | v_0 |
changeset 40 | a9db7fb3ce65 |
parent 39 | be8db46a38c3 |
child 41 | 514df5061f59 |
permissions | -rw-r--r-- |
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/** |
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* SQL-DK |
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* Copyright © 2013 František Kučera (frantovo.cz) |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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package info.globalcode.sql.dk.formatting; |
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import info.globalcode.sql.dk.Parameter; |
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import info.globalcode.sql.dk.configuration.DatabaseDefinition; |
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import java.util.EmptyStackException; |
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import java.util.EnumSet; |
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import java.util.List; |
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import java.util.Stack; |
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/** |
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* |
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* @author Ing. František Kučera (frantovo.cz) |
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*/ |
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public abstract class AbstractFormatter implements Formatter { |
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private Stack<State> state = new Stack<>(); |
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private FormatterContext formatterContext; |
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private ColumnsHeader currentColumnsHeader; |
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private String currentQuery; |
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private int currentColumnsCount; |
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private int currentRowCount; |
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public AbstractFormatter(FormatterContext formatterContext) { |
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this.formatterContext = formatterContext; |
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state.push(State.ROOT); |
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} |
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/* |
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* root |
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* .database |
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* ..resultSet |
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* ...@query |
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* ...@parameters |
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* ...@columnsHeader |
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* ...row |
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* ....@columnValue |
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* ..updatesResult |
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* ...@query |
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* ...@parameters |
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* ...@updatedRowsCount |
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* ...generatedKeys |
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* ....resultSet (see above) |
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*/ |
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protected enum State { |
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ROOT, |
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DATABASE, |
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RESULT_SET, |
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ROW, |
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UPDATES_RESULT, |
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GENERATED_KEYS |
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} |
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/** |
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* Go down in hierarchy. |
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* Pushes new state and verifies the old one. |
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* |
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* @param current the new state – currently entering |
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* @param expected expected previous states (any of them is valid) |
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* @return previous state |
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* @throws IllegalStateException if previous state was not one from expected |
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*/ |
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private State pushState(State current, EnumSet expected) { |
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State previous = state.peek(); |
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if (expected.contains(previous)) { |
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state.push(current); |
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return previous; |
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} else { |
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throw new IllegalStateException("Formatter was in wrong state: " + previous + " when it should be in one of: " + expected); |
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} |
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} |
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protected State peekState(EnumSet expected) { |
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State current = state.peek(); |
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if (expected.contains(current)) { |
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return current; |
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} else { |
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throw new IllegalStateException("Formatter is in wrong state: " + current + " when it should be in one of: " + expected); |
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} |
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} |
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/** |
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* Go up in hierarchy. |
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* Pops the superior state/branch. |
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* |
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* @param expected expected superior state |
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* @return the superior state |
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* @throws IllegalStateException if superior state was not one from expected or if there is no |
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* more superior state (we are at root level) |
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*/ |
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private State popState(EnumSet expected) { |
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try { |
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state.pop(); |
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State superior = state.peek(); |
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if (expected.contains(superior)) { |
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return superior; |
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} else { |
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throw new IllegalStateException("Formatter had wrong superior state: " + superior + " when it should be in one of: " + expected); |
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} |
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} catch (EmptyStackException e) { |
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throw new IllegalStateException("Formatter was already at root level – there is nothing above that.", e); |
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} |
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} |
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@Override |
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public void writeStartDatabase(DatabaseDefinition databaseDefinition) { |
22
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pushState(State.DATABASE, EnumSet.of(State.ROOT)); |
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128 |
} |
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129 |
|
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130 |
@Override |
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131 |
public void writeEndDatabase() { |
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popState(EnumSet.of(State.ROOT)); |
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133 |
} |
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134 |
|
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135 |
@Override |
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136 |
public void writeStartResultSet() { |
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pushState(State.RESULT_SET, EnumSet.of(State.DATABASE, State.GENERATED_KEYS)); |
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138 |
currentRowCount = 0; |
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139 |
} |
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140 |
|
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141 |
@Override |
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142 |
public void writeEndResultSet() { |
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143 |
popState(EnumSet.of(State.DATABASE, State.GENERATED_KEYS)); |
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144 |
currentColumnsHeader = null; |
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145 |
} |
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146 |
|
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147 |
@Override |
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public void writeQuery(String sql) { |
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peekState(EnumSet.of(State.RESULT_SET, State.UPDATES_RESULT)); |
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150 |
|
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151 |
if (currentColumnsHeader == null) { |
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currentQuery = sql; |
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153 |
} else { |
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throw new IllegalStateException("Query string '" + sql + "' must be set before columns header – was already set: " + currentColumnsHeader); |
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155 |
} |
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156 |
} |
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157 |
|
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158 |
@Override |
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first working version
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159 |
public void writeParameters(List<? extends Parameter> parameters) { |
22
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peekState(EnumSet.of(State.RESULT_SET, State.UPDATES_RESULT)); |
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161 |
|
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162 |
if (currentColumnsHeader != null) { |
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163 |
throw new IllegalStateException("Parameters '" + parameters + "' must be set before columns header – was already set: " + currentColumnsHeader); |
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164 |
} |
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165 |
|
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166 |
if (currentQuery == null) { |
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167 |
throw new IllegalStateException("Parameters '" + parameters + "' must be set after query – was not yet set."); |
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168 |
} |
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169 |
} |
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|
170 |
|
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171 |
@Override |
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172 |
public void writeColumnsHeader(ColumnsHeader header) { |
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František Kučera <franta-hg@frantovo.cz>
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|
173 |
peekState(EnumSet.of(State.RESULT_SET, State.GENERATED_KEYS)); |
22
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|
174 |
|
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175 |
if (currentColumnsHeader == null) { |
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|
176 |
currentColumnsHeader = header; |
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177 |
} else { |
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178 |
throw new IllegalStateException("Columns header can be set only once per result set – was already set: " + currentColumnsHeader); |
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179 |
} |
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180 |
} |
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|
181 |
|
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182 |
@Override |
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183 |
public void writeStartRow() { |
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|
184 |
pushState(State.ROW, EnumSet.of(State.RESULT_SET)); |
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|
185 |
currentColumnsCount = 0; |
25
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|
186 |
currentRowCount++; |
22
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|
187 |
} |
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|
188 |
|
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189 |
@Override |
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190 |
public void writeEndRow() { |
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|
191 |
popState(EnumSet.of(State.RESULT_SET)); |
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|
192 |
} |
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|
193 |
|
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|
194 |
@Override |
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195 |
public void writeColumnValue(Object value) { |
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|
196 |
peekState(EnumSet.of(State.ROW)); |
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|
197 |
currentColumnsCount++; |
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|
198 |
|
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199 |
int declaredCount = currentColumnsHeader.getColumnCount(); |
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200 |
if (currentColumnsCount > declaredCount) { |
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201 |
throw new IllegalStateException("Current columns count is " + currentColumnsCount + " which is more than declared " + declaredCount + " in header."); |
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202 |
} |
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203 |
} |
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204 |
|
39
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TabularFormatter: basic column padding
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|
205 |
/** |
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|
206 |
* @param value from ResultSet |
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|
207 |
* @return String representation of given value |
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|
208 |
*/ |
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TabularFormatter: basic column padding
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|
209 |
protected String toString(Object value) { |
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TabularFormatter: basic column padding
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|
210 |
/** |
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|
211 |
* TODO: basic formatting: boolean, null, date, numbers… |
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|
212 |
*/ |
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TabularFormatter: basic column padding
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|
213 |
return String.valueOf(value); |
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TabularFormatter: basic column padding
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|
214 |
} |
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TabularFormatter: basic column padding
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|
215 |
|
22
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|
216 |
@Override |
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|
217 |
public void writeStartUpdatesResult() { |
37
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support SQL commands returning more ResultSets + remove COMMAND_TYPE (type is now derived from result returned from SQL – it is not needed to specify the type on CLI)
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|
218 |
pushState(State.UPDATES_RESULT, EnumSet.of(State.DATABASE)); |
22
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|
219 |
} |
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220 |
|
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|
221 |
@Override |
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|
222 |
public void writeEndUpdatesResult() { |
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|
223 |
popState(EnumSet.of(State.DATABASE)); |
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|
224 |
currentColumnsHeader = null; |
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|
225 |
} |
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|
226 |
|
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227 |
@Override |
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228 |
public void writeUpdatedRowsCount(int updatedRowsCount) { |
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|
229 |
peekState(EnumSet.of(State.UPDATES_RESULT)); |
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|
230 |
} |
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|
231 |
|
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232 |
@Override |
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233 |
public void writeStartGeneratedKeys() { |
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|
234 |
pushState(State.GENERATED_KEYS, EnumSet.of(State.UPDATES_RESULT)); |
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235 |
} |
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236 |
|
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237 |
@Override |
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238 |
public void writeEndGeneratedKeys() { |
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|
239 |
popState(EnumSet.of(State.UPDATES_RESULT)); |
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|
240 |
} |
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|
241 |
|
24
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|
242 |
public FormatterContext getFormatterContext() { |
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|
243 |
return formatterContext; |
22
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244 |
} |
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|
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246 |
protected ColumnsHeader getCurrentColumnsHeader() { |
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|
247 |
return currentColumnsHeader; |
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248 |
} |
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/** |
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* @return column number, 1 = first |
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*/ |
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protected int getCurrentColumnsCount() { |
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return currentColumnsCount; |
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} |
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protected boolean isCurrentColumnFirst() { |
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return currentColumnsCount == 1; |
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} |
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protected boolean isCurrentColumnLast() { |
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return currentColumnsCount == currentColumnsHeader.getColumnCount(); |
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} |
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/** |
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* @return row number, 1 = first |
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*/ |
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protected int getCurrentRowCount() { |
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return currentRowCount; |
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} |
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/** |
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* TODO: write SQLWarning |
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*/ |
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} |