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Implement pretty printer #2894

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Merged
andimarek merged 5 commits into from
Aug 16, 2022
Merged

Implement pretty printer #2894

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6030b3a
Implement pretty printer
felipe-gdr Jul 13, 2022
c6bb935
Merge branch 'master' into pretty-printer
felipe-gdr Aug 1, 2022
05c229d
Expose default pretty options and rename capture rule context method
felipe-gdr Aug 3, 2022
923a034
Rename to PrettyAstPrinter; improve tests; add javadoc
felipe-gdr Aug 10, 2022
6ab2c9d
restrict access more and declare it experimental
andimarek Aug 15, 2022
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19 changes: 14 additions & 5 deletions src/main/java/graphql/language/AstPrinter.java
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Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,7 @@ public class AstPrinter {

private final boolean compactMode;

private AstPrinter(boolean compactMode) {
AstPrinter(boolean compactMode) {
this.compactMode = compactMode;
printers.put(Argument.class, argument());
printers.put(ArrayValue.class, value());
Expand Down Expand Up @@ -463,11 +463,11 @@ private String node(Node node, Class startClass) {
}

@SuppressWarnings("unchecked")
private <T extends Node> NodePrinter<T> _findPrinter(Node node) {
<T extends Node> NodePrinter<T> _findPrinter(Node node) {
return _findPrinter(node, null);
}

private <T extends Node> NodePrinter<T> _findPrinter(Node node, Class startClass) {
<T extends Node> NodePrinter<T> _findPrinter(Node node, Class startClass) {
if (node == null) {
return (out, type) -> {
};
Expand Down Expand Up @@ -689,7 +689,7 @@ public static void printAst(Writer writer, Node node) {

/**
* This will print the Ast node in graphql language format in a compact manner, with no new lines
* and comments stripped out of the text.
* and descriptions stripped out of the text.
*
* @param node the AST node to print
*
Expand All @@ -712,7 +712,16 @@ private static void printImpl(StringBuilder writer, Node node, boolean compactMo
*
* @param <T> the type of node
*/
private interface NodePrinter<T extends Node> {
interface NodePrinter<T extends Node> {
void print(StringBuilder out, T node);
}

/**
* Allow subclasses to replace a printer for a specific {@link Node}
* @param nodeClass the class of the {@link Node}
* @param nodePrinter the custom {@link NodePrinter}
*/
void replacePrinter(Class<? extends Node> nodeClass, NodePrinter<? extends Node> nodePrinter) {
this.printers.put(nodeClass, nodePrinter);
}
}
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