StringLiterals.java

package sk.stuba.fiit.perconik.core.java.dom;

import javax.annotation.Nonnull;

import com.google.common.base.Function;

import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.StringLiteral;

public final class StringLiterals {
  private StringLiterals() {}

  private enum ToEscapedValue implements Function<StringLiteral, String> {
    INSTANCE;

    public String apply(@Nonnull final StringLiteral literal) {
      return literal.getEscapedValue();
    }
  }

  private enum ToLiteralValue implements Function<StringLiteral, String> {
    INSTANCE;

    public String apply(@Nonnull final StringLiteral literal) {
      return literal.getLiteralValue();
    }
  }

  private static <N extends ASTNode, T> Function<N, T> cast(final Function<?, T> transformer) {
    // only for stateless internal singletons shared across all types
    @SuppressWarnings("unchecked")
    Function<N, T> result = (Function<N, T>) transformer;

    return result;
  }

  public static <N extends StringLiteral> Function<N, String> toEscapedValue() {
    return cast(ToEscapedValue.INSTANCE);
  }

  public static <N extends StringLiteral> Function<N, String> toLiteralValue() {
    return cast(ToLiteralValue.INSTANCE);
  }
}