Dave Jarvis' Repositories
git clone https://repo.autonoma.ca/repo/rxm.git
source/java/com/whitemagicsoftware/rxm/tree/TransformationTree.java
| /** | ||
| - * Wrap the given payload in the class responsible for transforming it. | ||
| + * Recursively traverses this tree and generates a string that is the | ||
| + * transformed version of an input AST. | ||
| * | ||
| - * @param payload The data to wrap in a corresponding transformation | ||
| - * instance. | ||
| + * @return A non-null string, possibly empty. | ||
| */ | ||
| - @Override | ||
| - protected void setPayload( T payload ) { | ||
| - super.setPayload( transform( payload ) ); | ||
| + public String toString() { | ||
| + return toString( this, 0 ); | ||
| + } | ||
| + | ||
| + /** | ||
| + * Depth-first traversal. | ||
| + */ | ||
| + protected String toString( Tree<T> tree, int depth ) { | ||
| + StringBuilder sb = new StringBuilder( indent( depth ) ); | ||
| + T payload = tree.getPayload(); | ||
| + | ||
| + sb.append( start( payload ) ); | ||
| + | ||
| + for( Tree<T> branch : tree.getLeaves() ) { | ||
| + sb.append( System.lineSeparator() ); | ||
| + | ||
| + // Recurse for all the branches at this level of the tree. | ||
| + sb.append( toString( branch, depth + getIndent() ) ); | ||
| + } | ||
| + | ||
| + sb.append( System.lineSeparator() ).append( indent( depth ) ); | ||
| + | ||
| + return sb.append( stop( payload ) ).toString(); | ||
| } | ||
| + | ||
| + /** | ||
| + * Called when entering a new hierarchy in the transformation tree. | ||
| + * | ||
| + * @param payload The data to transform into its opening text. | ||
| + */ | ||
| + protected abstract String start( T payload ); | ||
| + | ||
| + /** | ||
| + * Called when exiting a new hierarchy in the transformation tree. | ||
| + * | ||
| + * @param payload The data to transform into its closing text. | ||
| + */ | ||
| + protected abstract String stop( T payload ); | ||
| /** | ||
 |
||
| /** | ||
| - * Recursively traverses this tree and generates a string that is the | ||
| - * transformed version of an input AST. | ||
| + * Wrap the given payload in the class responsible for transforming it. | ||
| * | ||
| - * @return A non-null string, possibly empty. | ||
| - */ | ||
| - public String toString() { | ||
| - return toString( this, 0 ); | ||
| - } | ||
| - | ||
| - /** | ||
| - * Depth-first traversal. | ||
| + * @param payload The data to wrap in a corresponding transformation | ||
| + * instance. | ||
| */ | ||
| - protected String toString( Tree<T> tree, int depth ) { | ||
| - StringBuilder sb = new StringBuilder( indent( depth ) ); | ||
| - sb.append( tree.getPayload().toString() ); | ||
| - | ||
| - for( Tree<T> branch : tree.getLeaves() ) { | ||
| - sb.append( System.lineSeparator() ); | ||
| - | ||
| - // Recurse for all the branches at this level of the tree. | ||
| - sb.append( toString( branch, depth + getIndent() ) ); | ||
| - } | ||
| - | ||
| - return sb.toString(); | ||
| + @Override | ||
| + protected void setPayload( T payload ) { | ||
| + super.setPayload( transform( payload ) ); | ||
| } | ||
source/java/com/whitemagicsoftware/rxm/tree/xml/ASTParserRuleContext.java
| package com.whitemagicsoftware.rxm.tree.xml; | ||
| +import com.whitemagicsoftware.rxm.grammar.QueryParser; | ||
| + | ||
| import org.antlr.v4.runtime.ParserRuleContext; | ||
|
||
| /** | ||
| - * Subclasses override this method to create the correctly transformed | ||
| - * string. | ||
| + * Allows subclasses to retrieve the payload. | ||
| + * | ||
| + * @return The original (unwrapped) payload. | ||
| */ | ||
| - public String toString() { | ||
| - return getParserRuleContext().getText(); | ||
| - } | ||
| - | ||
| protected ParserRuleContext getParserRuleContext() { | ||
| return this.ctx; | ||
| } | ||
| + /** | ||
| + * Sets the payload. | ||
| + * | ||
| + * @param ctx The original (unwrapped) payload. | ||
| + */ | ||
| private void setParserRuleContext( ParserRuleContext ctx ) { | ||
| this.ctx = ctx; | ||
| + } | ||
| + | ||
| + /** | ||
| + * | ||
| + * @param name The name assigned to the element. | ||
| + */ | ||
| + protected String startElement( String name ) { | ||
| + return String.format( "XMLELEMENT( NAME \"%s\"", name ); | ||
| + } | ||
| + | ||
| + /** | ||
| + * @param name The name assigned to the attribute. | ||
| + */ | ||
| + protected String startAttributes( String name ) { | ||
| + return String.format( "XMLATTRIBUTES( %s AS ", name ); | ||
| + } | ||
| + | ||
| + /** | ||
| + * Casts the payload into the proper context, then extracts the element. | ||
| + * This should not be called if the wrapped payload does not have an | ||
| + * element. | ||
| + * | ||
| + * @return The element associated with the root parser rule. | ||
| + */ | ||
| + protected QueryParser.ElementContext getElementContext() { | ||
| + return ((QueryParser.RootContext)getParserRuleContext()).element(); | ||
| + } | ||
| + | ||
| + /** | ||
| + * Subclass override this to change the content returned by the parser | ||
| + * rule. This is called during transformation. | ||
| + */ | ||
| + @Override | ||
| + public abstract Token getStart(); | ||
| + | ||
| + /** | ||
| + * Subclass override this to change the content returned by the parser | ||
| + * rule. This is called during transformation. | ||
| + */ | ||
| + @Override | ||
| + public abstract Token getStop(); | ||
| + | ||
| + /** | ||
| + * Convenience method. | ||
| + * | ||
| + * @return The payload's text. | ||
| + */ | ||
| + @Override | ||
| + public String toString() { | ||
| + return getParserRuleContext().getText(); | ||
| } | ||
| } | ||
source/java/com/whitemagicsoftware/rxm/tree/xml/ColumnMapContext.java
| } | ||
| - public String toString() { | ||
| - return "COLUMN MAP:" + getParserRuleContext().getText(); | ||
| + @Override | ||
| + public Token getStart() { | ||
| + return new Token( "COLUMN MAP:" + toString() ); | ||
| + } | ||
| + | ||
| + @Override | ||
| + public Token getStop() { | ||
| + return new Token( ")" ); | ||
| } | ||
| } |
source/java/com/whitemagicsoftware/rxm/tree/xml/QueryTree.java
| super( payload ); | ||
| } | ||
| + | ||
| + /** | ||
| + * Returns the transformed syntax for beginning the payload item. | ||
| + * | ||
| + * @return A non-null string, possibly empty. | ||
| + */ | ||
| + protected String start( T payload ) { | ||
| + return payload.getStart().toString(); | ||
| + } | ||
| + | ||
| + /** | ||
| + * Returns the transformed syntax for ending the payload item. | ||
| + * | ||
| + * @return A non-null string, possibly empty. | ||
| + */ | ||
| + protected String stop( T payload ) { | ||
| + return payload.getStop().toString(); | ||
| + } | ||
| } | ||
source/java/com/whitemagicsoftware/rxm/tree/xml/RootContext.java
| package com.whitemagicsoftware.rxm.tree.xml; | ||
| +import com.whitemagicsoftware.rxm.grammar.QueryParser; | ||
| + | ||
| import org.antlr.v4.runtime.ParserRuleContext; | ||
| +/** | ||
| + * Transforms <code>root > element</code>. | ||
| + */ | ||
| public class RootContext extends ASTParserRuleContext { | ||
| public RootContext( ParserRuleContext ctx ) { | ||
| super( ctx ); | ||
| } | ||
| - public String toString() { | ||
| - return "ROOT:" + getParserRuleContext().getText(); | ||
| + /** | ||
| + * Transforms into SELECT, XMLROOT, and XMLELEMENT. | ||
| + */ | ||
| + @Override | ||
| + public Token getStart() { | ||
| + QueryParser.ElementContext element = getElementContext(); | ||
| + String e = element.getText(); | ||
| + | ||
| + String s = String.format( "SELECT%nXMLROOT( %s", startElement( e ) ); | ||
| + return new Token( s ); | ||
| + } | ||
| + | ||
| + /** | ||
| + * Closes the XMLROOT and XMLELEMENT. | ||
| + */ | ||
| + @Override | ||
| + public Token getStop() { | ||
| + return new Token( String.format( ")%s )", getDeclaration() ) ); | ||
| + } | ||
| + | ||
| + protected String getDeclaration() { | ||
| + return String.format( ", VERSION '%.1f', STANDALONE %s", | ||
| + getVersion(), isStandalone() ? "YES" : "NO" ); | ||
| + } | ||
| + | ||
| + protected float getVersion() { | ||
| + return 1.0f; | ||
| + } | ||
| + | ||
| + protected boolean isStandalone() { | ||
| + return true; | ||
| } | ||
| } |
source/java/com/whitemagicsoftware/rxm/tree/xml/TableMapContext.java
| import org.antlr.v4.runtime.ParserRuleContext; | ||
| +/** | ||
| + * Transforms <code>element > element</code>. | ||
| + */ | ||
| public class TableMapContext extends ASTParserRuleContext { | ||
| public TableMapContext( ParserRuleContext ctx ) { | ||
| super( ctx ); | ||
| } | ||
| - public String toString() { | ||
| - return "TABLE MAP:" + getParserRuleContext().getText(); | ||
| + @Override | ||
| + public Token getStart() { | ||
| + return new Token( "TABLE MAP:" + getParserRuleContext().getText() ); | ||
| + } | ||
| + | ||
| + @Override | ||
| + public Token getStop() { | ||
| + return new Token( ")" ); | ||
| } | ||
| } |
Open root, root element, and close them.
| Author | Dave Jarvis <email> |
|---|---|
| Date | 2015-03-07 19:04:47 GMT-0800 |
| Commit | 8e416edbdcf5fe44ef46255bee8c987d604826c3 |
| Parent | 35140a8 |
| Delta | 179 lines added, 40 lines removed, 139-line increase |