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feat: create customMetadata() mutable map in BaseTool #532

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Merged
copybara-service merged 1 commit into from
Oct 21, 2025
Merged

feat: create customMetadata() mutable map in BaseTool #532

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13 changes: 13 additions & 0 deletions core/src/main/java/com/google/adk/tools/BaseTool.java
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,7 @@
import com.google.adk.agents.ConfigAgentUtils.ConfigurationException;
import com.google.adk.models.LlmRequest;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import com.google.errorprone.annotations.DoNotCall;
import com.google.genai.types.FunctionDeclaration;
Expand All @@ -44,6 +45,7 @@ public abstract class BaseTool {
private final String name;
private final String description;
private final boolean isLongRunning;
private final HashMap<String, Object> customMetadata;

protected BaseTool(@Nonnull String name, @Nonnull String description) {
this(name, description, /* isLongRunning= */ false);
Expand All @@ -53,6 +55,7 @@ protected BaseTool(@Nonnull String name, @Nonnull String description, boolean is
this.name = name;
this.description = description;
this.isLongRunning = isLongRunning;
customMetadata = new HashMap<>();
}

public String name() {
Expand All @@ -72,6 +75,16 @@ public Optional<FunctionDeclaration> declaration() {
return Optional.empty();
}

/** Returns a read-only view of the tool metadata. */
public ImmutableMap<String, Object> customMetadata() {
return ImmutableMap.copyOf(customMetadata);
}

/** Sets custom metadata to the tool associated with a key. */
public void setCustomMetadata(String key, Object value) {
customMetadata.put(key, value);
}

/** Calls a tool. */
public Single<Map<String, Object>> runAsync(Map<String, Object> args, ToolContext toolContext) {
throw new UnsupportedOperationException("This method is not implemented.");
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