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Remove problem and guava dependencies
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| package org.zalando.fahrschein; | ||
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| import javax.annotation.Nullable; | ||
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| import static java.lang.String.format; | ||
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| public final class Preconditions { | ||
| private Preconditions() { | ||
| } | ||
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| public static void checkArgument(boolean expression) { | ||
| if (!expression) { | ||
| throw new IllegalArgumentException(); | ||
| } | ||
| } | ||
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| public static void checkArgument(boolean expression, Object errorMessage) { | ||
| if (!expression) { | ||
| throw new IllegalArgumentException(String.valueOf(errorMessage)); | ||
| } | ||
| } | ||
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| public static void checkArgument(boolean expression, String errorMessageTemplate, Object... errorMessageArgs) { | ||
| if (!expression) { | ||
| throw new IllegalArgumentException(format(errorMessageTemplate, errorMessageArgs)); | ||
| } | ||
| } | ||
|
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| public static void checkState(boolean expression) { | ||
| if (!expression) { | ||
| throw new IllegalStateException(); | ||
| } | ||
| } | ||
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| public static void checkState(boolean expression, Object errorMessage) { | ||
| if (!expression) { | ||
| throw new IllegalStateException(String.valueOf(errorMessage)); | ||
| } | ||
| } | ||
|
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| public static void checkState(boolean expression, String errorMessageTemplate, Object... errorMessageArgs) { | ||
| if (!expression) { | ||
| throw new IllegalStateException(format(errorMessageTemplate, errorMessageArgs)); | ||
| } | ||
| } | ||
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| public static <T> T checkNotNull(@Nullable T reference) { | ||
| if (reference == null) { | ||
| throw new NullPointerException(); | ||
| } | ||
| return reference; | ||
| } | ||
|
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| public static <T> T checkNotNull(@Nullable T reference, Object errorMessage) { | ||
| if (reference == null) { | ||
| throw new NullPointerException(String.valueOf(errorMessage)); | ||
| } | ||
| return reference; | ||
| } | ||
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| public static <T> T checkNotNull(@Nullable T reference, String errorMessageTemplate, Object... errorMessageArgs) { | ||
| if (reference == null) { | ||
| throw new NullPointerException(format(errorMessageTemplate, errorMessageArgs)); | ||
| } | ||
| return reference; | ||
| } | ||
| } |
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