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package graphql.parser;

import graphql.Assert;

import graphql.PublicApi;

/**

* Options that control how the {@link Parser} behaves.

*/

@PublicApi

public class ParserOptions {

private static ParserOptions defaultJvmParserOptions = newParserOptions()

.captureIgnoredChars(false)

.captureSourceLocation(true)

.build();

/**

* By default the Parser will not capture ignored characters. A static holds this default

* value in a JVM wide basis options object.

*

* Significant memory savings can be made if we do NOT capture ignored characters,

* especially in SDL parsing.

*

* @return the static default value on whether to capture ignored chars

*

* @see graphql.language.IgnoredChar

* @see graphql.language.SourceLocation

*/

public static ParserOptions getDefaultParserOptions() {

return defaultJvmParserOptions;

}

/**

* By default the Parser will not capture ignored characters. A static holds this default

* value in a JVM wide basis options object.

*

* Significant memory savings can be made if we do NOT capture ignored characters,

* especially in SDL parsing. So we have set this to false by default.

*

* This static can be set to true to allow the behavior of version 16.x or before.

*

* @param options - the new default JVM parser options

*

* @see graphql.language.IgnoredChar

* @see graphql.language.SourceLocation

*/

public static void setDefaultParserOptions(ParserOptions options) {

defaultJvmParserOptions = Assert.assertNotNull(options);

}

private final boolean captureIgnoredChars;

private final boolean captureSourceLocation;

private ParserOptions(Builder builder) {

this.captureIgnoredChars = builder.captureIgnoredChars;

this.captureSourceLocation = builder.captureSourceLocation;

}

/**

* Significant memory savings can be made if we do NOT capture ignored characters,

* especially in SDL parsing. So we have set this to false by default.

*

* @return true if ignored chars are captured in AST nodes

*/

public boolean isCaptureIgnoredChars() {

return captureIgnoredChars;

}

/**

* Memory savings can be made if we do NOT set {@link graphql.language.SourceLocation}s

* on AST nodes, especially in SDL parsing.

*

* @return true if {@link graphql.language.SourceLocation}s are captured in AST nodes

*

* @see graphql.language.SourceLocation

*/

public boolean isCaptureSourceLocation() {

return captureSourceLocation;

}

public static Builder newParserOptions() {

return new Builder();

}

public static class Builder {

private boolean captureIgnoredChars = false;

private boolean captureSourceLocation = true;

public Builder captureIgnoredChars(boolean captureIgnoredChars) {

this.captureIgnoredChars = captureIgnoredChars;

return this;

}

public Builder captureSourceLocation(boolean captureSourceLocation) {

this.captureSourceLocation = captureSourceLocation;

return this;

}

public ParserOptions build() {

return new ParserOptions(this);

}

}

}