Example usage for org.springframework.messaging.support MessageBuilder copyHeaders

Introduction

In this page you can find the example usage for org.springframework.messaging.support MessageBuilder copyHeaders.

Prototype

public MessageBuilder<T> copyHeaders(@Nullable Map<String, ?> headersToCopy) 

Source Link

Document

Copy the name-value pairs from the provided Map.

Usage

From source file:org.springframework.messaging.converter.AbstractMessageConverter.java

@Override
@Nullable//from w w w.  j av a  2s .co m
public final Message<?> toMessage(Object payload, @Nullable MessageHeaders headers,
        @Nullable Object conversionHint) {
    if (!canConvertTo(payload, headers)) {
        return null;
    }

    Object payloadToUse = convertToInternal(payload, headers, conversionHint);
    if (payloadToUse == null) {
        return null;
    }

    MimeType mimeType = getDefaultContentType(payloadToUse);
    if (headers != null) {
        MessageHeaderAccessor accessor = MessageHeaderAccessor.getAccessor(headers,
                MessageHeaderAccessor.class);
        if (accessor != null && accessor.isMutable()) {
            if (mimeType != null) {
                accessor.setHeaderIfAbsent(MessageHeaders.CONTENT_TYPE, mimeType);
            }
            return MessageBuilder.createMessage(payloadToUse, accessor.getMessageHeaders());
        }
    }

    MessageBuilder<?> builder = MessageBuilder.withPayload(payloadToUse);
    if (headers != null) {
        builder.copyHeaders(headers);
    }
    if (mimeType != null) {
        builder.setHeaderIfAbsent(MessageHeaders.CONTENT_TYPE, mimeType);
    }
    return builder.build();
}

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From source file:org.springframework.messaging.support.converter.AbstractMessageConverter.java

@Override
public final Message<?> toMessage(Object payload, MessageHeaders headers) {
    if (!canConvertTo(payload, headers)) {
        return null;
    }// ww w.ja  va  2  s .  c om
    payload = convertToInternal(payload, headers);
    MessageBuilder<?> builder = MessageBuilder.withPayload(payload);
    if (headers != null) {
        builder.copyHeaders(headers);
    }
    MimeType mimeType = getDefaultContentType(payload);
    if (mimeType != null) {
        builder.setHeaderIfAbsent(MessageHeaders.CONTENT_TYPE, mimeType);
    }
    return builder.build();
}

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