public final class PromptTemplate

Object
PromptTemplate

Trivial {placeholder} substitution. Designed for the common “build a prompt from a handful of fields” pattern without pulling in a templating library. For anything more sophisticated (loops, conditionals) just compose strings directly.

String prompt = PromptTemplate.of(
    "You are an expert {role}. Reply in {style}."
).put("role", "tax accountant").put("style", "bullet points").build();

Methods

`public static` `PromptTemplate of(String template)`	Starts a template instance.
`public` `PromptTemplate put(String key, String value)`	Binds one placeholder.
`public` `PromptTemplate putAll(Map<String, String> map)`	Adds all supplied placeholder values.
`public` `String build()`	Renders the final string.
`public` `ChatMessage asUser()`	Convenience: render and wrap as a `ChatMessage` with USER role.
`public` `ChatMessage asSystem()`	Convenience: render and wrap as a `ChatMessage` with SYSTEM role.

Inherited methods

From Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait, clone

Method details

of

public static PromptTemplate of(String template)

Starts a template instance.

Parameters

template String: text containing optional {name} placeholders

Returns

mutable template values bound to the supplied text

put

public PromptTemplate put(String key, String value)

Binds one placeholder. A null value renders as an empty string.

Parameters

key String: placeholder name without braces
value String: replacement value

Returns

this template

putAll

public PromptTemplate putAll(Map<String, String> map)

Adds all supplied placeholder values.

Parameters

map Map<String, String>: replacements keyed by placeholder name; null is ignored

Returns

this template

build

public String build()

Renders the final string. Unknown placeholders are left intact ({like_this}) so they’re easy to spot in test output – silently dropping them tends to hide bugs.

Returns

rendered prompt text

asUser

public ChatMessage asUser()

Convenience: render and wrap as a ChatMessage with USER role.

Returns

rendered user message

asSystem

public ChatMessage asSystem()

Convenience: render and wrap as a ChatMessage with SYSTEM role.

Returns

rendered system message